CDDIS

The International Association of Geodesy (IAG)

The International Association of Geodesy (IAG) is a scientific organization in the field of geodesy. The mission of the IAG is the advancement of geodesy and thus the association promotes scientific cooperation and research in geodesy on a global scale and contributes to it through its various research bodies. It is an active member of the International Association of Geodesy and Geophysics (IUGG) which itself is a member of the International Council for Science (ICSU). Key components of the IAG are its Services. In particular, the geometric services are dedicated to providing data and products relevant for geodesy and broader scientific applications:

• International GNSS Service (IGS)
• International Laser Ranging Service (ILRS)
• International VLBI Service for Geodesy and Astrometry (IVS)
• International DORIS Service (IDS)

Services function as cooperating federations dedicated to a particular type of data. They provide data and products on an operational basis to geodesy analysts as well as a broader scientific community. The services are examples of a successful model of community management where they develop standards, are self-regulating, monitor performance, and define and deliver products using pre-determined schedules. The IAG services are a excellent example of successful operation through cooperation of many international organizations who leverage their respective limited resources to all levels of service functionality.

The CDDIS is the principle data center supporting four geometric services created under the IAG and make up the primary user community for CDDIS archive.

Space Geodesy Project (SGP)

NASA's Space Geodesy Project (SGP) is an initiative that started in the fall of 2011. SGP is part of the Earth Science Decadal and the National Research Council study "Precise Geodetic Infrastructure." It is a Goddard/JPL partnership with participation from the Smithsonian Astrophysical Observatory and the University of Maryland.

The long-range goal of the Space Geodesy Project is to build, deploy and operate a next generation NASA Space Geodetic Network (NSGN) of integrated, multi-technique next generation space geodetic observing systems, along with a system that provides for accurate vector ties between them. This new NSGN will serve as NASA’s core contribution to a global network designed to produce the higher quality observational data required to maintain the Terrestrial Reference Frame and provide other data necessary for fully realizing the measurement potential of the current and coming generation of Earth Observing spacecraft.

The primary goals of the SGP are to:

• Contribute to the maintenance and improvement of a stable Terrestrial Reference Frame (TRF) that meets the needs of NASA's Earth orbiting missions, Earth Surface and Interior Focus Area, and deep space navigation
• Contribute to measurements of Earth orientation parameters (EOP) that meet the needs of NASA's Earth orbiting missions, Earth Surface and Interior Focus Area, and deep space navigation
• Contribute to determining accurate precision orbits to meet the needs of NASA's geodetic, Earth observation, navigation and space science missions

From: SGP website

International Earth Rotation and Reference Systems Service (IERS)

The International Earth Rotation and Reference Systems Service (IERS) was created in 1988 by the International Union of Geodesy and Geophysics (IUGG) and the International Astronomical Union (IAU). It replaced the Earth rotation section of the Bureau International de l'Heure (BIH), and the International Polar Motion Service (IPMS). It is a member of the Federation of Astronomical and Geophysical Data Analysis Services.

According to its Terms of Reference, the mission of the IERS is to provide timely and accurate data on the Earth's rotation for current use and long-term studies. For this purpose it has established and maintains an international terrestrial reference frame and an international celestial reference frame and it regularly monitors the relative motion of these two frames by analysing observational data from a variety of techniques, including Very Long Baseline Interferometry (VLBI), Lunar Laser Ranging (LLR) and satellite-geodetic techniques such as Global Navigation Satellite Systems (GNSS), Satellite Laser Ranging (SLR), and Doppler Orbitography and Radio-Positioning by Integrated Satellite (DORIS).

The IERS techniques have strengths that are used in a complementary way, keeping enough redundancy for ensuring the permanence of the service over decades and maintaining close operational interaction with other global astronomical and geophysical programs. The maintenance of the consistency and accuracy of IERS products requires a careful organisation and management of the contributions of the major techniques used in space navigation, space geodesy and astrometry.

The IERS is an interdisciplinary service that maintains key connections between astronomy, geodesy and geophysics.

From: IERS web site

Global Geodetic Observing System (GGOS)

In mid-2003, the IAG established the Global Geodetic Observing System (GGOS) as a project to foster cooperation among the geometric services of the IAG and to promote outreach and education to a broad user community on the importance of the geodetic infrastructure to many Earth science applications. GGOS, a component of the IAG, works to integrate the geodetic techniques to ensure long-term monitoring of Earth processes, including global change research. Distribution of data and products for the generation of GGOS combination products will be accomplished through the data flow paths developed by the IAG services forming the underlying structure of GGOS. Access to data and products generated by these services will continue to be provided through the services, either directly or via a GGOS portal. This portal will facilitate access to GGOS products and provide a way to view the underlying, dedicated information systems developed by the IAG’s contributing services.

The CDDIS supports GGOS as an essential archive for the geometric services and will contribute to the GGOS portal by implementing systems to provide uniform access to a combined set of geodetic services’ information as well as technique-specific information systems.

From: GGOS web site

Earth Observing System Data and Information System (EOSDIS)

In late 2007, funding support for the CDDIS transitioned from the science research area within NASA to the Earth Observing System Data and Information System (EOSDIS). EOSDIS is a key core capability in NASA's Earth Science Data Systems Program. EOSDIS provides end-to-end capabilities for managing NASA’s Earth science data from various sources – satellites, aircraft, field measurements, and other programs. EOSDIS is responsible for the processing, archiving, and distribution of Earth science data sets, providing tools to facilitate use of these data, and ensuring that these data are available to the public to study Earth processes from space in order to meet the needs of the global community. In addition to managing the science systems, EOSDIS supports 12 Distributed Active Archive Centers (DAACs) in the U.S., each of which serves a specific Earth system science discipline. As one of these EOSDIS data centers, the CDDIS cooperates with other groups in support of NASA’s Earth science goals. This activity includes implementation of metadata standards that will eventually permit discovery of CDDIS archive content by researchers outside the existing user base. Thus, the CDDIS will have the opportunity to promote use of its data and products to a broader scientific community.

Solid Earth and Natural Hazards Research and Applications NRA

In 1996, the Solid Earth and Natural Hazards Research and Applications NASA Research Announcement (NRA) presented an opportunity for researchers to participate in the NASA research and development themes of Solid Earth and Natural Hazards Research and Applications. The research themes aim to develop and use NASA space geodetic and remote sensing technology to improve our understanding of the physical dynamics of the solid earth (including the interaction with atmosphere, ocean and fluid core) and to improve and demonstrate the capability of this technology in the assessment and mitigation of natural hazards.

From: Solid Earth and Natural Hazards Research and Applications NRA, August 1996

Crustal Dynamics Project (CDP)

The scientific objectives of the Crustal Dynamics Project (CDP) developed by the science community and NASA in the late 1970's were to improve our knowledge and understanding of:

• Regional deformation and strain accumulation related to earthquakes at the plate boundary in the western United States
• Contemporary relative plate tectonic motions of the North American, Pacific, South American, Eurasian, Australian, Nazca, and Caribbean plates
• Internal deformation of lithospheric plates away from plate boundaries, with particular emphasis on North America
• Polar motion and variations in Earth rotation and their possible correlation with earthquakes and other geophysical phenomena
• Crustal motion and deformation occuring in other regions of high earthquake activity.

These objectives required the development of global geodetic systems that could measure distances with high accuracy. As a consequence, a major goal of NASA and solid Earth science in the 1970s was the development of satellite laser ranging (SLR) and very long baseline interferometry (VLBI) techniques to accuracy levels that would enable the scientific problems to be addressed. By the late 1970s, confidence in the viability of these measurement techniques justified initiation of an international, global program. This led to the formation of the NASA Crustal Dynamics Project (CDP) in 1979.

During the 1980s, the CDP and its international partners have made measurements of crustal motion between numerous sites around the world. One of the primary results of this work was to show that the current day motion of the major plates is close to the million year average motion vectors developed from geology. In addition, our knowledge of the distribution of crustal deformation occurring at both transform and subduction plate boundaries was significantly increased; and a new international effort was spawned to monitor the rotational dynamics of the Earth with unprecedented accuracy.

Through improvements in the tracking of satellites, our models of the Earth's gravity field and the ocean tides were dramatically improved.

From: Contributions of Space Geodesy to Geodynamics: Crustal Dynamics, Introduction, D.E. Smith and M. Baltuck

Dynamics of the Solid Earth (DOSE) Investigation

NASA's Solid Earth Sciences Branch identified broad scientific research objectives which required:

• the improvement of our understanding of the interactions of the solid Earth with the oceans, ground water and atmosphere on time scales of hours to millions of years
• the local changes in sea level resulting from changes in the Earth's climatic, hydrologic, and tectonic systems
• the response of the lithosphere to local regional strain and loading and unloading phenomena such as post-seismic and glacial rebound; the evolving landscape as a record of tectonics, volcanism, and climate change during the last two million years
• the motions and deformations of the lithosphere within the plates and across plate boundaries; the evolution of continents and the structure of the lithosphere
• the dynamics of the mantle including the driving mechanisms of plate motion ; the dynamics of the core and the origin of the magnetic field
• the origins and variability of the Earth's gravity field, and
• the rotational dynamics and reference frames of the planet.

A major emphasis in Dynamics of the Solid Earth (DOSE) for the 1990s was NASA's contribution to the implementation and operation of an international global geophysical network for integrated, comprehensive measurements of many geophysical parameters. This fiducial network incorporates VLBI, SLR, and GPS (GNSS) systems which are operated on a permanent, continuous basis, and which will provide reference geodetic data to which regional studies occupying many sites on a short-term, temporary basis can anchor. Two or more different systems are co-located at many sites to provide strong reference frame ties, strengthen fiducial control, and allow intercomparison of the techniques. The two components of the system can be briefly characterized:

• Fiducial Laboratories for an International Natural Science Network (FLINN) - a global permanent network of space geodetic stations with approximately 1000 km spacing which integrate GPS (GNSS), VLBI, SLR, and LLR technology to monitor plate motion and deformation, to monitor Earth rotation, and to define and maintain a terrestrial reference frame.
• Densely Spaced Geodetic Systems (DSGS) - temporary or permanent regional and local monitoring networks deployed across tectonically active regions to measure and analyze motion and deformation over a broad range of spatial and temporal scales.

A total of 54 investigations were selected in response to the DOSE NRA.

From: DOSE NRA, December 1990

2018

• 2018 ESIP Winter Meeting, Bethesda, MD, USA, January 9-11
• ION Precise Time and Time Interval Meeting (PTTI), Reston, VA, USA, January 29 - February 01
• IGNSS2018, Sydney, Australia, February 07-09
• European Geosciences Union General Assembly 2018, Vienna, Austria, April 08-13
• FIG XXVI Congress and General Assembly, Istanbul, Turkey, May 06-11
• European Navigation Conference, Gothenburg, Sweden, May 14-17
• AOGS 15th Annual Meeting, Hawaii, USA, June 03-08
• 0th IVS General Assembly, Longyearbyen, Spitsbergen, Norway, June 03-09
• IDS AWG meeting, Toulouse, France, June 11
• Sentinel-3A POD Quality Working Group, Toulouse, France, June 12
• IDS Governing Board meeting, Toulouse, France, June 13
• 42nd COSPAR Scientific Assembly, Pasadena, CA, USA, July 14-22
• 2018 ESIP Summer Meeting, Scripps, Tucson, AZ, USA, July 17-July 20
• IX International Symposium: "Metrology of Time and Space", September 12-14
• "25 years of Progress in Radar Altimetry" Symposium, Ponta Delgada, São Miguel Island, Azores Archipelago (Portugal), September 24-29
  • IDS workshop 2018, September 26-28
• GGOS Days 2018 - Tsukuba, Japan, October 02-04
• IGS 2018 Workshop, Wuhan, China, October 29 - November 02
• 21st International Workshop on Laser Ranging, Canberra, Australia, November 04-09
• AGU 2018 Fall Meeting, Washington, D.C., USA, December 10-14

2016

• ION Precise Time and Time Interval Meeting (PTTI), Monterey, CA, USA, January 25-27
• IGS Workshop "GNSS Futures", Sydney, NSW, Australia, February 08–12
• Munich Satellite Navigation Summit 2016, Munich, Germany, March 01-03
• 2nd IVS Training School for the Next Generation Geodetic and Astrometric VLBI, Hartebeesthoek Radio Observatory, South Africa, March 09-12
• 9th International VLBI Service for Geodesy and Astrometry (IVS) General Meeting, Ekudeni in Muldersdrift (near Johannesburg), South Africa, March 13-19
• European Geosciences Union General Assembly 2016, Vienna, Austria, April 17–22
• Living Planet Symposium 2016, Prague, Czech Republic, May 09-13
• Celebrating 40 Years of LAGEOS, NASA Goddard Space Flight Center, Greenbelt, MD, USA, May 11
• EUREF Symposium 2016, San Sebastian, Spain, May 25-27
• IDS Analysis Working Group meeting, Delft, The Netherlands, May 26-27
• 2016 European Navigation Conference, Helsinki, Finland, May 30 - June 02
• European Space Solutions, The Hague, The Netherlands, May 30 - June 03
• The Science of Time: Time in Astronomy & Astronomy, Past, Present, and Future, Cambridge, MA, USA, June 05-09
• 18th International Symposium on Geodynamics and Earth Tides, Trieste, Italy, June 05-09
• 3rd IEEE International Workshop on Metrology for Aerospace (MetroAeroSpace 2016), Florence, Italy, June 22-23
• On the Threshold of 1st Gaia Data - the Gaia Research for European Astronomy Training (GREAT) Network Science Symposium, Athens, Greece, July 04-06
• Geodesy, Astronomy and Geophysics in Earth Rotation (GAGER2016) - A Joint IAU/IAG/IERS Symposium, Wuhan, Hubei, China, July 18-23
• International Symposium on Geodesy and Geodynamics (ISGG 2016), Tianjin, China, July 22-26
• IAG/CPGPS 1st International Conference on GNSS+ (ICG+2016), Shanghai, China, July 27-30
• AOGS 13th Annual Meeting, Beijing, China, July 31 - August 05
• 6th Session of UN-GGIM, New York, NY, USA, August 01-05
• CODATA-RDA School of Research Data Science, Trieste, Italy, August 01-12
• IAG Commission 4 "Positioning and Applications" Symposium, Wroclaw, Poland, September 04-07
• WDS Members' Forum, Denver, Colorado, USA, September 11
• 18th General Assembly of WEGENER, Ponta Delgada, Portugal, September 12-15
• IAG Workshop: "Understanding the Earth core and nutation.", Brussels, Belgium, September 19-21
• International Symposium on Gravity, Geoid and Height Systems 2016 (GGHS2016), Thessaloniki, Greece September 19-23
• 13th European VLBI Network (EVN) Symposium and Users' Meeting, St. Petersburg, Russia, September 20-23
• 3rd UN-GGIM Europe Plenary meeting, Budapest, Hungary, October 05
• First International Workshop on VLBI Observations of Near-field Targets, Bonn, Germany, October 05-06
• GRACE Science Team Meeting, Potsdam Germany, October 05-07
• 20th International Workshop on Laser Ranging, Potsdam Germany, October 09-14
• 5th International VLBI Technology Workshop, Haystack Observatory, Westford, MA, USA, October 12-14
• Fifth UN-GGIM Asia and the Pacific Plenary Meeting, Kuala Lumpur, Malaysia, October 16-20
• GGOS Days 2016, Cambridge MA, USA, October 24-28
• 10th DiFX Users and Developers Meeting, Shanghai, China, October 30 - November 3
• Ocean Surface Topography Science Team (OSTST) Meeting, La Rochelle, France, October 31 - November 04
• Gaia 2016 Data Release #1 Workshop, Madrid, Spain, November 02-04
• 11th Meeting of the International Committee on Global Navigation Satellite Systems (ICG), Sochi, Russia, November 06-11
• International Navigation Conference (INC2016), Glasgow, United Kingdom, November 08-10
• SIRGAS Symposium 2016, Quito, Ecuador, November 16-18
• Gaia Data Workshop, Heidelberg, Germany, November 21-24
• ISGNSS 2016: International Symposium on GNSS, Tainan, Taiwan, December 05-07
• International Global Navigation Satellite Systems (IGNSS) 2016, Sydney, Australia, December 06-08
• 7th Gaia Science Alerts Workshop 2016, Utrecht, The Netherlands, December 07-09
• 2016 American Geophysical Union Fall meeting, San Francisco, CA, USA, December 12-16

2015

• 2015 EGU General Assembly, Vienna, Austria, April 12-17
• GNSS+R 2015 Workshop, Potsdam, Germany, May 11-13
• European Lunar Symposium, Frascati, Italy, May 12-14
• 22nd Meeting of the European VLBI Group for Geodesy and Astrometry (EVGA), Sao Miguel, Azores, May 17-21
• IDS AWG, Toulouse, France, May 28-29, 2015
• The Third International LARES Science Workshop, Rome, Italy, June 15-17
• 26th IUGG General Assembly, Prague, Czech Republic, June 22 to July 2
  • IAG Symposium on Reference Frames
• 1st DEMETRA Workshop, Prague, Czech Republic, July 17, 2015.
• Fifth Session of the United Nations Committee of Experts on Global Geospatial Information Management (UN-GGIM), New York, NY, USA, August 03-07
• ESA/JRC International Summer School on GNSS, Barcelona, Spain, August 31 - September 10
• Sixth 2015 European Radio Interferometry School (ERIS2015), Garching, Germany on September 06-10
• VI International Time Scale Algorithms Symposium and Tutorials, Sevres, France, September 09-11
• GRACE Science Team Meeting, Austin, Texas, USA, September 21-23
• IDS DORIS Analysis Working Group meeting, Greenbelt, Maryland, October 15-16
• OSTST (Jason2-3 Ocean Surface Topography Science Team Meeting), Reston, VA, October 18-23
• 2015 ILRS Technical Workshop, Matera Italy, October 24-30
• COSPAR Capacity Building Workshop, Planetary data mission analysis, Guaratinguetá, Brazil, October 26 - November 06
• 5th International Colloquium on Scientific and Fundamental Aspects of the Galileo Programme, Braunschweig, Germany, October 27 - 29
• 10th Meeting of the International Committee on Global Navigation Satellite Systems (ICG-10), Boulder, CO, USA, November 01-06
• 6th Gaia Science Alerts Workshop, November 10-13, Liverpool, UK
• International Symposium on GNSS (IS-GNSS), Kyoto Japan, November 16-19
• Simposio SIRGA 2015 y VII Escuela SIRGAS es Sistemas de Referencia, November 16-20, Santo Domingo, Dominican Republic
• 4th International VLBI Technology Workshop, Auckland, New Zealand, November 23-25
• International Committee on Global Navigation Satellite Systems, Experts Meeting: Global Navigation Satellite Systems Services, Vienna, Austria, December 15-18
• 2015 American Geophysical Union Fall Meeting, San Francisco, CA, USA, December 14-18,

2014

• 8th IVS General Meeting "VGOS: The New VLBI Network", Shanghai, China, March 02-07
• IDS AWG meeting, CNES HQ, Paris France, March 26-27
• EGU General Assembly, Vienna Austria, April 28 - May 02
  • IAG Service Review, Technical University of Vienna, April 25
  • GGOS Coordinating Board Meeting, Technical University of Vienna, April 26
  • IGS Governing Board Business Meeting, Technical University of Vienna, April 27
  • ILRS Analysis Working Group Meeting, Technical University of Vienna, April 28
  • ILRS LARGE Study Group Meeting, Technical University of Vienna, April 28
  • GGOS Networks and Communications Bureau Meeting, Technical University of Vienna, April 30
  • GGOS PLATO Working Group Meeting, EGU Splinter Meeting R9, May 01 at GIAC Meeting, Technical University of Vienna, May 01
• XXV FIG Congress and General Assembly, Kuala Lumpur, Malaysia, June 16-21
• IGS 20th Anniversary Workshop, Pasadena CA, USA, June 23 - 27
• International Symposium on Geodesy for Earthquake and Natural Hazards, Matsushima, Japan, July 22-26
• 40th COSPAR Scientific Assembly, Moscow, Russia, August 02-10
• European VLBI Network (EVN) Symposium, Cagliari, Sardinia (Italy), October 07-10, 2014
• IAG Commission 1 Symposium 2014 on Reference Frames for Applications in Geosciences (REFAG2014), Luxembourg, October 13-17
• SARAL/AltiKa Workshop, Lake Constance, Germany, October 27
• IDS workshop 2014, Lake Constance, Germany, October 27-28
• 2014 Ocean Surface Topography Science Team (OSTST) meeting, Lake Constance, Germany, October 28-31
• 19th International Workshop on Laser Ranging "Celebrating 50 Years of SLR: Looking Back and Planning Forward", Greenbelt, MD, USA, October 27-31
• Third International VLBI Technology Workshop, Groningen, the Netherlands, November 10-13.
• Precise Time and Time Interval Conference, Boston , MA, USA, December 01-04
• AGU Fall Meeting, San Francisco CA, December 15-19
  • GGOS Consortium, December 13, 08:00-12:00
  • GGOS Coordinating Board, December 13, 13:00-18:00
  • IGS Governing Board, December 14, 13:00-18:00
  • IERS, December 14, 08:00-13:00
  • GIAC, December 14, 08:00-12:00
  • GGOS Bureau of Networks and Observations, December 17, 13:00-16:00

2013

• IVS EGU Training School for VLBI in Geodesy and Astrometry, Helsinki, Finland, March 02-05
• 21st EVGA Meeting, Helsinki, Finland, March 06-08
• EGU General Assembly Vienna, Austria, April 07-12
  • ILRS Analysis Working Group Meeting, April 07
• AGU Meeting of the Americas, Cancun, Mexico, May 14-17
• Geoscience Union (JpGU) Meeting, Chiba-city, Japan, May 19-24
• IERS Workshop on Local Surveys and Co-locations, Paris France, May 21-22
• AOGS 10th Annual Meeting, Brisbane, Australia, June 24-28
• 2013 Beacon Satellite Symposium, Assembly Rooms, Bath, UK, July 8-12
• IAG Scientific Assembly, Potsdam, Germany, September 01-06
  • ILRS Analysis Working Group Meeting, September 01
• ITU/BIPM Workshop on the Future of the International Time Scale, Geneva, September 19-20
• 2nd International VLBI Technology Workshop, Seogwipo, Jeju Island of South Korea, October 10-12
• 18th International Workshop on Laser Ranging, Fujiyoshida, Japan, November 11-15
• AGU Fall Meeting, San Francisco CA, December 09-13

EGM96 is a geopotential model of Earth consisting of spherical harmonic coefficients complete to degree and order 360. It is a composite solution, consisting of: a combination solution to degree and order 70; a block diagonal solution from degree 71 to 359; and the quadrature solution at degree 360. The EGM96 model is the result of a collaboration between the National Geospatial Intelligence Agency (NGA, formerly known as the National Imagery and Mapping Agency/NIMA), NASA's Goddard Space Flight Center, and the Ohio State University.

The major reference for this model is NASA/TP-1998-206861.

How to Cite EGM96

Please use the following citation when referencing EGM96:

The Development of the Joint NASA GSFC and NIMA Geopotential Model EGM96, F. G. Lemoine, S. C. Kenyon, J. K. Factor, R.G. Trimmer, N. K. Pavlis, D. S. Chinn, C. M. Cox, S. M. Klosko, S. B. Luthcke, M. H. Torrence, Y. M. Wang, R. G. Williamson, E. C. Pavlis, R. H. Rapp and T. R. Olson, NASA Goddard Space Flight Center, Greenbelt, Maryland, 20771 USA, July 1998.

The following proceedings paper can also be used as a citation:

Lemoine, F.G., D.E. Smith, L. Kunz, N.K. Pavlis, S.M. Klosko, D.S. Chinn, M.H. Torrence, R.G. Williamson, C.M. Cox, K.E. Rachlin, Y.M. Wang, S.C. Kenyon, R. Salman, R. Trimmer, R. H. Rapp, and R.S. Nerem (1997), “The development of the NASA GSFC and NIMA Joint Geopotential Model,” in Gravity Geoid and Marine Geodesy, International Association of Geodesy Symposia, vol. 117, edited by J. Segawa, H. Fujimoto and S. Okubo, Springer-Verlag, Berlin, Germany, 1997, pp. 461–469, doi:10.1007/978-3-662-03482-8.

2024

• IDS Workshop 2024, Montpellier, France, September 4-5, 2024
  • The Crustal Dynamics Data Information System (CDDIS) – 2024 Status Update (poster), T. Yates, J. Woo, N. Pollack, C. McLaughlin, presented at the IDS Workshop 2024, Montpellier, France, September 4-5, 2024
• Earth Science Information Partners Conference, Asheville, North Carolina, July 22-26, 2024
  • An Overview of the CDDIS Archive and Commitment to FAIR Data (poster), C. McLaughlin, J. Woo, N. Pollack, T. Yates, R. Bagwell, presented at the Earth Science Information Partners Conference, Asheville, North Carolina, USA, July 22-26, 2024
• European Geophysical Union (EGU) General Assembly 2024, Vienna, Austria , April 14-19, 2024
  • The Crustal Dynamics Data Information System (CDDIS) – Updates and Future Developments (poster), J. Woo, T. Yates, N. Pollack, presented at the European Geophysical Union (EGU) General Assembly 2024, Vienna, Austria , April 14-19, 2024
• 13^th IVS General Meeting and 25^th Anniversary, Tsukuba, Japan, March 4-9, 2024
  • CDDIS Data Ingest Updates and Future Developments, T. Yates, J. Woo, N. Pollack, R. Limbacher, M. Finch, P. Michael, presented at the 13^th IVS General Meeting and 25^th Anniversary, Tsukuba, Japan, March 4-9, 2024

2023

• AGU Fall Meeting 2023, San Francisco, CA, USA, December 11-15, 2023
  • The Crustal Dynamics Data Information System (CDDIS) – Updates and Future Developments, (poster), J. Woo, T. Yates, B. P. Michael, presented at the AGU Fall Meeting 2023, San Francisco, CA, USA, December 11-15, 2023
• 28th IUGG General Assembly, Berlin, Germany, July 11-20, 2023
  • CDDIS FAIR Commitment and NASA's Year of Open Science, (poster), J. Woo, N. Pollack, T. Yates, B. P. Michael, presented at the 28th IUGG General Assembly, Berlin, Germany, July 11-20, 2023

2022

• AGU Fall Meeting 2022, Chicago, IL, USA, December 12-16, 2022
  • GNSS Real-Time Data and Product Streams at NASA's CDDIS: User Applications and Caster Performance Improvements, (poster), S. M. Blevins, T. A. Yates, N. Pollack, J. Ash, J. H. Roark, and B. P. Michael, presented at the AGU Fall Meeting 2022, Chicago, IL, USA, December 12-16, 2022
  • Detecting Satellite Laser Ranging Station Data and Operational Anomalies with Machine Learning Isolation Forests at NASA's CDDIS, (poster), J. Woo, S. Blevins, B. P. Michael, presented at the AGU Fall Meeting 2022, Chicago, IL, USA, December 12-16, 2022
• 22nd International Workshop on Laser Ranging, Guadalajara, Spain and Online (Hybrid), November 7-11, 2022
  • CDDIS Services to the ILRS, (poster), J. Woo, B. P. Michael, S. Blevins, presented at the 22nd International Workshop on Laser Ranging, Guadalajara, Spain and Online (Hybrid), November 7-11, 2022
  • ILRS Data Centers: Overview, Current Status, and Future Work, (poster), J. Woo, C. Schwatke, S. Blevins, B. P. Michael, presented at the 22nd International Workshop on Laser Ranging, Guadalajara, Spain and Online (Hybrid), November 7-11, 2022
  • Detecting Satellite Laser Ranging Station Data and Operational Anomalies with Machine Learning Isolation Forests at NASA's CDDIS, (poster), J. Woo, S. Blevins, B. P. Michael, presented at the 22nd International Workshop on Laser Ranging, Guadalajara, Spain and Online (Hybrid), November 7-11, 2022
• IDS Workshop, Hybrid, October 31-November 02, 2022
  • DORIS Data Ingest Improvements at NASA CDDIS, T. Yates, J. Woo, S. Blevins, B. Michael, (poster), presented virtually at the IDS Workshop, October 31-November 02, 2022
• 12th IVS General Meeting (GM2022), virtual, March 28-April 01, 2022
  • VLBI Data Ingest Improvements at NASA CDDIS, T. Yates, J. Woo, N. Pollack, J. Ash, J. Roarke, S. Blevins, B. Michael, (poster), presented virtually at the 12th IVS General Meeting (GM2022), March 28-April 01, 2022

2021

• 2021 Fall AGU meeting, Virtual, December 06-17, 2021
  • Error Tracking at the CDDIS and Communication with the User Community, J. Woo, S. Blevins, B. Michael, R. Limbacher, T. Yates, (poster), presented virtually at the 2021 Fall AGU meeting, December 06-17, 2021

2020

• 2020 Fall AGU meeting, Virtual, December 01-17, 2020
  • DOIs for Geodetic Data and Derived Product Collections at the NASA GSFC CDDIS, S. Blevins, L. Tyahla, B. P. Michael, C. Noll, (poster), presented virtually at the 2020 Fall AGU meeting, December 01-17, 2020
  • Technology Changes and User Community Reaction - An Example from CDDIS, B.P. Michael, C. Noll, (poster), presented virtually at the 2020 Fall AGU meeting, December 01-17, 2020
  • Improving Archive Completeness and Timeliness of Data Product Availability at Crustal Dynamics Data Information System (CDDIS), J. Woo, B. P. Michael, (poster), presented virtually at the 2020 Fall AGU meeting, December 01-17, 2020
• EGU2020: Sharing Geoscience Online, May 04-08, 2020
  • GGOS: Current Activities and Plans of the Bureau of Networks and Observations, M. Pearlman et al., presented at EGU2020: Sharing Geoscience Online, May 04-08, 2020
    • Poster
    • Abstract
  • Recent Progress and Plans for Improvement of ILRS Infrastructure and Data Product Delivery, M. Pearlman et al., presented at EGU2020: Sharing Geoscience Online, May 04-08, 2020
    • Presentation
    • Abstract

2019

• 2019 Fall AGU meeting, San Francisco, CA, USA, December 09-13, 2019
  • NASA CDDIS: Supporting Global Geodetic and Geophysical Research and Applications, P. Michael, C. Noll, (poster) presented at the 2019 Fall AGU meeting, San Francisco, CA, USA, December 09-13, 2019
  • Enhancements to the GNSS Real-time System at CDDIS, S. Blevins, N. Pollack, P. Michael, C. Noll, (poster) presented at the 2019 Fall AGU meeting, San Francisco, CA, USA, December 09-13, 2019
• 2019 ILRS Technical Workshop, Stuttgart, Germany, October 21-25, 2019
  • ILRS: Recent Developments, Noll, C., Pearlman, M., presented at the 2019 ILRS Technical Workshop, Stuttgart, Germany, October 21-25, 2019
• First SLR School, Stuttgart, Germany, October 20, 2019
  • Role and function of the SLR Data Centers, Noll, C., presented at the First SLR School, Stuttgart, Germany, October 20, 2019
• The Tenth Symposium on Polar Science, Tokyo, Japan, December 03-05, 2019
  • The Final Frontier for Satellite Laser Ranging: Antarctica, T. Otsubo, Y. Aoyama, A. Hattori, K. Doi, M. R. Pearlman, C. E. Noll, presented at theThe Tenth Symposium on Polar Science, Tokyo, Japan, December 03-05, 2019.
• 27th IUGG General Assembly, Montreal Canada, July 08-18, 2019
  • The Crustal Dynamics Data Information System: NASA's Active Archive of Geodetic Observations Supporting Research in Understanding our Dynamic Earth, C. Noll, P. Michael, (poster), presented at the 27th IUGG General Assembly, Montreal Canada, July 08-18, 2019.
• EGU General Assembly, Vienna, Austria, April 07-12, 2019
  • GGOS: Current Activities and Plans of the Bureau of Networks and Observations (poster), M. Pearlman et al., presented at the EGU General Assembly, Vienna, Austria, April 07-12, 2019

2018

• AGU 2018 Fall meeting, Washington, DC, December 10-14, 2018
  • Important Changes to User Access at the NASA CDDIS (poster), C. Noll, P. Michael, presented at the AGU 2018 Fall meeting, Washington, DC, December 10-14, 2018
  • Real-time GNSS data and product streams at NASA GSFC CDDIS (poster), S. M. Blevins, C. E. Noll, N. Pollack R. Limbacher, J. Woo, J. Ash, J. Roark, P. Michael, presented at the AGU 2018 Fall meeting, Washington, DC, December 10-14, 2018
  • Recent Progress and Plans for the ILRS (poster), M. R. Pearlman, C. Noll, E. Pavlis, F. Lemoine, J. Mueller, V. Shargorodsky, Z. Zhongping, G. Kirchner, U. Schreiber, G. Appleby, presented at the AGU 2018 Fall meeting, Washington, DC, December 10-14, 2018
  • Software Best Practices at Crustal Dynamics Data Information System (CDDIS): Steps to Consider (poster), J. Woo, P. Michael, C. Noll, R. Limbacher, presented at the AGU 2018 Fall meeting, Washington, DC, December 10-14, 2018
• 21st International Workshop on Laser Ranging, Canberra, Australia, November 04-09, 2018
  • NASA CDDIS: Important Changes to User Access (poster), C. Noll, P. Michael, presented at the 21st International Workshop on Laser Ranging, Canberra, Australia, November 04-09, 2018
  • Station Assessment Software – Initial Results (poster), J. Woo, E. Hoffman, M. Torrence, presented at the 21st International Workshop on Laser Ranging, Canberra, Australia, November 04-09, 2018
  • Software Best Practices at Crustal Dynamics Data Information System (CDDIS): Steps to Consider (poster), J. Woo, P. Michael, C. Noll, R. Limbacher, presented at the 21st International Workshop on Laser Ranging, Canberra, Australia, November 04-09, 2018
• IGS 2018 Workshop, Wuhan, China, October 29 - November 02, 2018
  • NASA CDDIS: Important Changes to User Access (poster), C. Noll and P. Michael, presented at the IGS 2018 Workshop, Wuhan, China, October 29 - November 02, 2018
  • Progress and Improvements in Real-time Services at NASA GSFC CDDIS (poster), S.M. Blevins, C.E. Noll, N. Pollack, R. Limbacher, J. Woo, J. Ash, J. Roark, B.P. Michael, presented at the IGS 2018 Workshop, Wuhan, China, October 29 - November 02, 2018
  • Survey of Solar Flare Signatures in the Upper Ionosphere with GNSS and GOES Observations: A Case Study (poster), S.M. Blevins, L.A. Hayes, Y.M. Collado-Vega, B.P. Michael, C.E. Noll, presented at the IGS 2018 Workshop, Wuhan, China, October 29 - November 02, 2018
• IDS workshop 2018, Ponta Delgada, São Miguel Island, Azores Archipelago (Portugal), September 26-28, 2018
  • NASA CDDIS: Important Changes to User Access (poster), C. Noll and P. Michael, presented at the IDS workshop 2018, Ponta Delgada, São Miguel Island, Azores Archipelago (Portugal), September 26-28, 2018
• European Geosciences Union General Assembly 2018, Vienna, Austria, April 08-13, 2018
  • GGOS: Bureau of Networks and Observations (poster), M.R. Pearlman, J.M. Gipson, G. Johnston, C.E. Noll, E.C. Pavlis, J. Saunier, A. Matthews, R. Barzaghi, D. Thaller, S. Bergstrand, J. Müller, presented at the European Geosciences Union General Assembly 2018, Vienna, Austria, April 08-13, 2018

2017

• Fall American Geophysical Union meeting 2017, New Orleans, LA, USA, December 11-15, 2017
  • NASA CDDIS: Next generation system (poster), C. Noll, P. Michael, J. Woo, R. Limbacher, presented at the Fall American Geophysical Union meeting 2017, New Orleans, LA, USA, December 11-15, 2017
  • Survey of localized solar flare signatures in the ionosphere with GNSS, VLF, and GOES observations (poster), S. Blevins, L. Hayes, Y. Collado-Vega, P. Michael, C. Noll, presented at the Fall American Geophysical Union meeting 2017, New Orleans, LA, USA, December 11-15, 2017
• IAG and IASPEI Joint Scientific Assembly, Kobe, Japan, July 30 - August 04, 2017
  • The GGOS Bureau of Networks and Observations (poster), M. Pearlman and C. Noll, presented at the IAG and IASPEI Joint Scientific Assembly, Kobe, Japan, July 30 - August 04, 2017
• NASA Earthdata Webinar Series
  • J. Weiss, GNSS Radio Occultation Science and Applications" Webinar, July 19, 2017.
• IGS Workshop 2017, Paris, France, July 03-07, 2017
  • An Update on the CDDIS IGS Global Data Center (poster), C. Noll and P. Michael, presented at IGS Workshop 2017, Paris, France, July 03-07, 2017.
  • Real-time data and product performance metrics at NASA GSFC CDDIS (poster), S. Blevins, P. Michael, and C. Noll, presented at IGS Workshop 2017, Paris, France, July 03-07, 2017.
  • GNSS Quality Control Improvements and Provider Performance Tracking at the Crustal Dynamics Data Information System (CDDIS) (poster), J. Woo, R. Limbacher, C. Noll, and P. Michael, presented at IGS Workshop 2017, Paris, France, July 03-07, 2017.
• European Geosciences Union General Assembly 2017, Vienna, Austria, April 24-28, 2017
  • Supporting GGOS Through NASA’s Archive of Space Geodesy Data and Products (poster), P. Michael and C. Noll, presented at European Geosciences Union General Assembly 2017, Vienna, Austria, April 24-28, 2017, Abstract No. EGU2017-10698
  • The GGOS Bureau of Networks & Observations: An Update on the Space Geodesy Network & the New Implementation Plan for 2017-2018 (poster), M. Pearlman, C. Noll, C. Ma, E. Pavlis, R. Neilan, J. Saunier, T. Schoene, R. Barzaghi, D. Thaller, S. Bergstrand, J. Mueller, presented at European Geosciences Union General Assembly 2017, Vienna, Austria, April 24-28, 2017, Abstract No. EGU2017-10698

2016

• Fall American Geophysical Union meeting, San Francisco, CA, USA
  • ILRS: Current Status and Future Challenges, M. Pearlman, G. Bianco, S. Merkowitz, C. Noll, E. Pavlis, V. Shargorodsky, Z. Zhongping, presented at the Fall American Geophysical Union meeting, San Francisco, CA, USA, December 06-12, 2016
  • CDDIS: NASA’s Archive of Space Geodesy Data and Products Supporting GGOS (poster), C. Noll, P. Michael, presented at the Fall American Geophysical Union meeting, San Francisco, CA, USA, December 06-12, 2016
  • Next Generation Global Navigation Satellite System (GNSS) Processing at NASA CDDIS (poster), P. Michael, C. Noll, J. Woo, R. Limbacher, presented at the Fall American Geophysical Union meeting, San Francisco, CA, USA, December 06-12, 2016
• 20th International Workshop on Laser Ranging
  • CDDIS Data Center: An Update (poster), C. Noll, P. Michael, presented at the 20th International Workshop on Laser Ranging, Potsdam Germany, October 10-14, 2016
• 2016 WDS Members' Forum
  • GGOS: Global Geodetic Observing System, C. Noll, presented at IGS Workshop "GNSS Futures", Denver, Colorado, September 11, 2016
  • GGOS: The Global Geodetic Observing System (poster), G. Stangl, C. Noll, presented at 2016 WDS Members' Forum, Denver, Colorado, September 11, 2016
  • Crustal Dynamics Data Information System: NASA’s Active Archive of Space Geodesy Data and Derived Products (poster), C. Noll, P. Michael, presented at 2016 WDS Members' Forum, Denver, Colorado, September 11, 2016
  • International Laser Ranging Service: Supporting geodetic and geophysical research and applications through Satellite Laser Ranging (poster), C. Noll, M. Pearlman, presented at 2016 WDS Members' Forum, Denver, Colorado, September 11, 2016
• NASA Earthdata Webinar Series
  • F. Lemoine, NASA Space Geodesy Data for Precise Orbit Determination of Altimeter Satellites, June 29, 2016.
    • Presentation slides
    • Recorded webinar
• European Geosciences Union General Assembly 2016, Vienna, Austria, April 17–22, 2016
  • Update on the Activities of the GGOS Bureau of Networks and Observations, M. Pearlman, E. Pavlis, C. Ma, C. Noll, D. Thaller, B. Richter, R. Gross, R. Neilan, M. Mueller, R. Barzaghi, S. Bergstrand, J. Saunie, M. Tamisiea, presented at European Geosciences Union General Assembly, April, 2016, Abstract No. 10095. (poster)
• IGS Workshop "GNSS Futures", Sydney, NSW, Australia, February 08–12, 2016
  • C. Noll, P. Michael, Developments at CDDIS to Support Real-Time and RINEX V3 (poster)
  • P. Michael, C. Noll, Important Upcoming Architecture and User Changes at the CDDIS (poster)

2015

• 2015 Fall AGU meeting, San Francisco, CA USA, December 14-18, 2015
  • C. Noll, P. Michael, N. Pollack, Recent Developments at the CDDIS in Support of GGOS, presented at Fall 2015 AGU meeting, December, 2015, Abstract No, G43A-1023. (poster)
• 2015 ILRS Technical Workshop, Matera Italy, October 26-30, 2015
  • C. Noll, M. Pearlman, M. Torrence, Summary of Results from ILRS GNSS Tracking Campaigns (2014-2015) (poster)
  • M. Pearlman, C. Noll, M. Torrence, Results from ILRS GNSS Tracking Campaigns (presentation)
• NASA Earthdata Webinar Series
  • C. Noll, P. Michael, L. Tyahla, Distributing Real-Time GNSS Data and Derived Products at the CDDIS, July 22, 2015.
    • Presentation slides
    • Recorded webinar
• EGU 2015, April 13-17, 2015, Vienna, Austria, April 12-17, 2105
  • M. Pearlman, C. Ma, C. Noll, E. Pavlis, H. Schuh, T. Schoene, R. Barzaghi, S. Kenyon, "The GGOS Bureau of Networks and Observations and an Update on the Space Geodesy Networks", Abstract EGU2015-7420.

2014

• 2014 AGU Fall Meeting, San Francisco CA, December 15-19
  • C. Noll, B. Michael, N. Pollack, Recent Developments in Space Geodesy Data Discovery at the CDDIS, Abstract IN11C-3623.
  • P. Michael, C. Noll, J. Roark, CDDIS Near Real Time Data for Geodesy Based Applications, Abstract IN43C-3709.
• Fifth Symposium on Polar Science, December 02-05, 2014
  • M. Pearlman, A. Ipatov, F. Lemoine, J. Long, C. Ma, S. Merkowitz, R. Neilan, C. Noll, E. Pavlis, H. Schuh, V. Shargorodsky, D. Stowers, S. Wetzel, The Expanding Core and Co-location Space Geodesy Network and the Importance of High Latitude Sites
• 19^th International Laser Ranging Workshop, Annapolis, MD, USA, October 27-31, 2014
  • C. Noll, Satellite Laser Ranging Tracking Through the Years, Abstract 3046.
  • C. Noll, SLR, GNSS, VLBI, and DORIS Networks: ILRS+IGS+IVS+IDS, Abstract 3048.
  • C. Noll, P. Michael, Recent CDDIS Developments, Abstract 3043.
  • C. Noll, N. Pollack, The ILRS Website's Site Log Viewer Application, Abstract 3045.
• IGS 20th Anniversary Workshop, Pasadena, CA June 23-27, 2014
  • C. Noll, P. Michael, Recent Developments at the CDDIS
  • P. Michael, C. Noll, J. Roark, CDDIS Real-Time Developments
  • C. Noll, IGS Data Centers: Status and Progress
• NASA Earthdata Webinar Series
  • C. Noll, L. Tyahla, Discover NASA's Archive for Space Geodesy Data, CDDIS, June 6, 2014.
    • Presentation slides
    • Recorded webinar
• EGU General Assembly, Vienna, Austria, April 28 - May 02, 2014
  • M. Pearlman, A. Ipatov, J. Long, C. Ma, S. Merkowitz, R. Neilan, C. Noll, E. Pavlis, V. Shargorodsky, D. Stowers, S. Wetzel, "The Global Space Geodesy Network: Activities Underway", Abstract EGU2014-3140.
  • C. Abbondanza, Z. Altamimi, .TM. Chin , X. Collilieux, R. Dach, R.S. Gross, M.B. Heflin, R. König, F.G. Lemoine, D.S. Macmillan, J.W. Parker, T. van Dam, X. Wu, "Assessing the Impact of non-Tidal Atmospheric Loading on a Kalman Filter-based Terrestrial Reference Frame,"
  • C. Noll, P. Michael, N. Pollack, L. Tyahla, "Supporting GGOS through the Crustal Dynamics Data Information System,"
  • R. S. Gross, C. Abbondanza, T. M. Chin, M. Heflin, J. Parker, X. Wu, D. Angermann and M. Seitz, "Intercomparing EOPs from ITRF2008, DTRF2008, and JTRF2008"

2013

• 2013 Fall Meeting, AGU, San Francisco, Calif., Dec. 09-13
  • C. Noll, M. Dube, N. Pollack, L. Tyahla, B. Michael, Improvements in Space Geodesy Data Discovery at the CDDIS, Abstract IN31C-1520.
  • 18th International Workshop on Laser Ranging, Fujiyoshida, Japan, Nov 11-15, 2013
    • C. Noll, M. Torrence, N. Pollack, L. Tyahla, "ILRS Website Update".
    • C. Noll, M. Pearlman, M. Torrence, "ILRS Station Reporting".

2012

• 2012 Fall Meeting, AGU, San Francisco, Calif., Dec. 03-07
  • C. Noll, M. Dube, P. Michael, N. Pollack, L. Tyahla, "Improvements to the Crustal Dynamics Data Information System", Abstract IN43B-1515.
• 2012 IGS Analysis Workshop, Olsztyn, Poland, July 2012
  • C. Noll, P. Michael, M. Dube, N. Pollack, "An Update on the CDDIS".
  • S. Desai, R. Gross, L. Hilliard, F. Lemoine, J. Long, C. Ma, J. McGarry, S. Merkowitz, D. Murphy, C. Noll, E. Pavlis, M. Pearlman, D. Stowers, F. Webb, "NASA's Next Generation Space Geodesy Network".

2011

• 2011 Fall Meeting, AGU, San Francisco, Calif., Dec. 05-09
  • C. Noll, N. Pollack, P. Michael, "Improvements in Space Geodesy Data Discovery at the CDDIS", Abstract IN41B-1410.
• European Geosciences Union (EGU) General Assembl, Vienna Austria, April 04-08
  • M. Pearlman, E. Pavlis, C. Ma, Z. Altamimi, C. Noll, D. Stowers, "Space Geodesy Networks to Improve the ITRF".

2010

• 2010 Fall Meeting, AGU, San Francisco, Calif, Dec 13-17
  • C. Noll, M. Schmidt, P. Michael, Y. Lu (2010), "Updates to the IGS Data Center Infrastructure;" Abstract G11B-0642.
  • G. Appleby, G. Kirchner, J. McGarry, T. Murphy, C. Noll, E. Pavlis, M. Pearlman, F., Pierron, "Current Trends in Satellite Laser Ranging", Abstract G14B-05.
• Space Conference of the Americas 2010, Pachuca Mexico, November 15-19, 2010.
  • M. Pearlman, E. Pavlis, C. Noll, "The Need for A Precise Space Geodesy Infrastructure" (Spanish)
• NASA GSFC IS&T Colloquium, September 15, 2010
  • C. Noll, "The CDDIS: Supporting Scientific Analysis for 25+ Years Using Space Geodesy Data and Products"
• INPE, Sao Paulo Brazil, August 13, 2010
  • M. Pearlman, "Modern Ground Networks for Space Geodesy Applications"
• The Meeting of the Americas, Foz do Iguaçu, Brazil, August 8-12
  • M. Pearlman, E. Pavlis, Z. Altamimi, Z., C. Noll, "Establishing a Modern Ground Network for Space Geodesy Applications", Eos Trans. AGU, 91(26), Meet. Am. Suppl., Abstract G12A-04, 2010.
  • M. Pearlman, G. Appleby, G. Kirchner, J. McGarry, T. Murphy, C. Noll, E. Pavlis, F. Pierron, "Current Trends in Satellite Laser Ranging", Eos Trans. AGU, 91(26), Meet. Am. Suppl., Abstract G13C-07, 2010.
• IGS Analysis Workshop, Newcastle, UK, June 2010
  • C. Noll, M. Schmidt, H. Habrich, B. Garayt, "The Evolution of the IGS Flow of Data (and Products and Information) and Steps Ahead"
  • C. Noll, M. Dube, P. Michael, "Recent Developments at the CDDIS".
• M. Pearlman, "The Need for Space Geodesy Networks", November 2010.

2009

• Science Exploration Directorate Director's Seminar, July 24, 2009
  • C. Noll, "The CDDIS: Supporting Scientific Analysis for 25+ Years Using Space Geodesy Data and Products"
• IEEE International Geosciences Meeting, Cape Town SA, July 2009
  • M. Pearlman, "The International Laser Ranging Service (ILRS) and Its Impact on GEOSS"
• CDDIS Focus Group Meeting, January, 2009
  • C. Noll, "CDDIS Data Discovery"
• GCMD Workshop, March, 2009
  • C. Noll, "CDDIS Overview"
• EOS User Services Working Group Meeting, September, 2009
  • C. Noll, "CDDIS Update for EOS USWG"
• GGOS Networks and Communications Bureau Meeting, April 2009
  • C. Noll, "IAG Service Networks in GoogleEarth"
• Holy Trinity Episcopal Day School 7th Grade Science Class, October, 2009
  • C. Noll, "SLR and GPS (and Plate Tectonics and Earthquakes)"
• Unified Analysis Working Group Meeting, December 2009
  • B. Richter and C. Noll, "GGOS Portal and Metadata"

2008

• 2008 Fall Meeting, AGU, San Francisco, Calif, Dec., 2008
  • C. Noll, The Global GNSS, SLR, VLBI, and DORIS Networks and their Support of GGOS: IGS+ ILRS+IVS+IDS, Eos Trans. AGU, 89(53), Fall Meet. Suppl., Abstract G33A-066.
• 16th International Workshop on Laser Ranging, Poznan, Poland, October 2008
  • C. Noll, "SLR, GNSS, VLBI and DORIS Networks: ILRS+IGS+IVS+IDS"
  • C. Noll, "Satellite Laser Ranging Tracking through the Years"
  • C. Noll, M. Torrence, "ILRS Web Site Update"
• User Services Working Group Fall 2008 Meeting, ORNL, September 2008
  • C. Noll, "CDDIS Overview"
• IGS Analysis Center Workshop, Miami Beach, FL, June 2008
  • C. Noll, "IGS Data Center operations & issues: Overview"
  • C. Noll, M. Dube, "NASA's Crustal Dynamics Data Information System (CDDIS) and its support of the IGS, ILRS, IVS, and IDS"

2007

• M. Pearlman, "Space Geodesy and Satellite Laser Ranging", Lima Peru, February 13, 2007.

2006

• 15th International Workshop on Laser Ranging, Canberra, Australia, October 2006
  • C. Noll, M. Torrence, W. Seemueller, "Laser Ranging Archiving and Infrastructure Support through the ILRS Data Centers and Web Site"

2005

• Dynamic Planet 2005, Cairns Australia, August 2005
  • M. Pearlman, C. Noll, W. Gurtner, R. Noomen, "The International Laser Ranging Service and its Support for GGOS"
  • M. Pearlman, et al, "GGOS Working Group on Ground Networks and Communication"

2004

• Fall AGU, San Francisco, CA, December 2004
  • C. Noll, M. Dube, "Archiving Space Geodesy Data for 20+ Years at the CDDIS"
• Meeting with South Korean Visitors, GSFC, Greenbelt, MD, June 2004
  • C. Noll, "CDDIS Overview"
• 14th International Workshop on Laser Ranging, San Fernando, Spain, June 2004
  • C. Noll, M. Dube, "CDDIS Archive Structure Supporting Laser Ranging Data and Products"
• 2004 IDS Plenary Meeting, Paris, France, May 2004
  • C. Noll, E. Gaulué, "IDS Data Center Update"
• IGS 2004 Workshop and Symposium, Berne, Switzerland, March 2004
  • C. Noll, M. Dube, "The IGS Global Data Center at the CDDIS - An Update"

2003

• International DORIS Service and DORIS Network Workshop, Marne la vallée, France, February 2003
  • "Archive and Distribution of DORIS Data and Products in Support of the IDS"

2002

• International DORIS Service and DORIS Network Workshop, Biarritz, France June 2002
  • C. Noll, P. Willis, "IDS Data Center Update"
• Spring AGU, Washington, D.C., May 2002
  • C. Noll, M. Dube, "The CDDIS Data Center – NASA’s Space Geodesy Data Archive"
• IGS Network, Data, and Analysis Center Workshop Ottawa, Canada, April 2002
  • C. Noll, "Current Status of IGS Data Centers"
  • C. Noll, "The IGS Global Data Center at the CDDIS – an Update "

2001

• Science Data Centers Symposium, Pasadena, CA, March 2001
  • C. Noll, M. Dube, "The Crustal Dynamics Data Information System CDDIS -- NASA's Space Geodesy Data Archive"
• IGS LEO Pilot Project Planning Meeting, Potsdam, Germany, February 2001
  • C. Noll, "CDDIS Support of the LEO Pilot Project"

2000

• IGS Network Workshop, Oslo, Norway, July 2000
  • C. Noll, "Current Status of and Backup Plans for Flow of IGS Data and Products"
  • C. Noll, M. Dube, "The IGS Global Data Center at the CDDIS -- An Update"
• DORIS Days 2000, Toulouse, France, May 2000
  • C. Noll, M. Dube, "DORIS Data Center at the CDDIS"

1999

• International Symposium on GPS (GPS-99) in Tsukuba, Japan, October 1999
  • C. Noll, "IGS Data Centers"
• IGEX-98 Workshop, Nashville, TN, September, 1999
  • C. Noll, "IGEX-98 Data Flow"
  • C. Noll, M. Dube, "The IGEX Data Center at the CDDIS"

1998

• Fall 1998 AGU, San Francisco, CA, USA
  • C. Noll, M. Dube, "The Space Geodesy Data Archive and Distribution Facility of the CDDIS"
• IGS Network Systems Workshop
  • C. Noll, "Recent Enhancements of the CDDIS"
• Science Data Centers Symposium, November, 1998
  • C. Noll, M. Dube, "Overview of the Crustal Dynamics Data Information System CDDIS"

Journal Articles

2019

• Pearlman, M., Noll C., Pavlis E., Lemoine F., Combrink L., Degnan J., Kirchner G., Schreiber U., The ILRS: approaching twenty years and planning for the future, Journal of Geodesy, 2019, DOI: https://doi.org/10.1007/s00190-019-01241-1
• Noll, C.E., Ricklefs, R., Horvath, J. et al., Information Resources Supporting Scientific Research for the International Laser Ranging Service, J Geod (2018). https://doi.org/10.1007/s00190-018-1207-2

2018

• McGarry, J.F., Hoffman, E.D., Degnan, J.J. et al., NASA’s satellite laser ranging systems for the twenty-first century, J Geod (2018). doi: https://doi.org/10.1007/s00190-018-1191-6
• Merkowitz, S.M., Bolotin, S., Elosegui, P. et al., Modernizing and expanding the NASA Space Geodesy Network to meet future geodetic requirements, J Geod (2018), doi: https://doi.org/10.1007/s00190-018-1204-5
• Noll, C., Ricklefs, R., Horvath, J., Mueller, H., Schwatke, C., Torrence, M., Information resources supporting scientific research for the international laser ranging service, Journal of Geodesy, 2018, DOI: https://doi.org/10.1007/s00190-018-1207-2

2017

• O. Montenbruck, P. Steigenberger, L. Prange, Z. Deng, Q. Zhao, F. Perosanz, I. Romero, C. Noll, A. Stürze, G. Weber, R. Schmid, K. MacLeod, S. Schaer, The Multi-GNSS Experiment (MGEX) of the International GNSS Service (IGS) – Achievements, Prospects and Challenges, Advances in Space Research, Available online 17 January 2017, DOI: 10.1016/j.asr.2017.01.011

2010

• C. Noll, The Crustal Dynamics Data Information System: A resource to support scientific analysis using space geodesy, Advances in Space Research, Volume 45, Issue 12, 15 June 2010, Pages 1421-1440, ISSN 0273-1177, DOI: 10.1016/j.asr.2010.01.018.

2009

• C. Noll, Y. Bock, H. Habrich and A. Moore, "Development of data infrastructure to support scientific analysis for the International GNSS Service", Journal of Geodesy, Feb 2009, pages 309-325, DOI 10.1007/s00190-008-0245-6.

2007

• M. Pearlman, C. Noll, J. McGarry, W. Gurtner, E. Pavlis, The International Laser Ranging Service, AOGS 2007, Adv. Geosciences, 2007.

2006

• Z. Altamimi, M. Pearlman, N. Beck, R. Forsberg, W Gurtner, S. Kenyon, D. Behrend, F.G. Lemoine, C. Ma, C.E. Noll, E.C. Pavlis, Z. Malkin, A.W. Moore, F.H. Webb, R.E. Neilan, J.C. Ries, M. Rothacher and P. Willis. Global Geodetic Observing System -- Considerations for the Geodetic Network Infrastructure. Geomatica, 60(2)193-204.
• C. Noll, L. Soudarin, "On-line Resources Supporting the Data, Products, and Information Infrastructure for the International DORIS Service", Journal of Geodesy, Jan 2006, Pages 1 - 9, DOI 10.1007/s00190-006-0051-y.

Technical Papers

2016

• IAG 150 Years, Proceedings of the 2013 IAG Scientific Assembly, Postdam, Germany, 1–6 September, 2013, Rizos, C., Willis, P. (Eds.), IAG Symposia 143, ISBN: 978-3-319-24603-1 (Print) 978-3-319-30895-1 (Online), 2016.
• P. Willis , F. G. Lemoine, G. Moreaux, L. Soudarin, P. Ferrage, J. Ries, M. Otten, J. Saunier, C. Noll, R. Biancale, B. Luzum, The International DORIS Service (IDS): Recent Developments in Preparation for ITRF2013, IAG 150 Years, Proceedings of the 2013 IAG Scientific Assembly, Postdam, Germany, 1–6 September, 2013, Rizos, C., Willis, P. (Eds.), IAG Symposia 143, ISBN: 978-3-319-24603-1 (Print) 978-3-319-30895-1 (Online), 2016.

2015

• A. Nothnagel, International VLBI Service for Geodesy and Astrometry (IVS); 2015: The IVS data input to ITRF2014. International VLBI Service for Geodesy and Astrometry, GFZ Data Services. http://doi.org/10.5880/GFZ.1.1.2015.002

2014

• C. Noll, Satellite Laser Ranging Tracking Through the Years, 19^th International Laser Ranging Workshop, Annapolis, MD., 2014.
• C. Noll, SLR, GNSS, VLBI, and DORIS Networks: ILRS+IGS+IVS+IDS, 19^th International Laser Ranging Workshop, Annapolis, MD., 2014.
• C. Noll, P. Michael, Recent CDDIS Developments, 19^th International Laser Ranging Workshop, Annapolis, MD., 2014.
• C. Noll, N. Pollack, The ILRS Website's Site Log Viewer Application, 19^th International Laser Ranging Workshop, Annapolis, MD., 2014.

2007

• C. Noll, Pearlman, M. (Eds.). International Laser Ranging Service 2005-2006 Report. NASA Technical Paper NASA/TP-2007-214153. Washington, D.C : National Aeronautics and Space Administration, 2007.
• M. Pearlman, C. Noll, W. Gurtner, and R. Noomen, The International Laser Ranging Service and its Support for GGOS, Dynamic Planet - Monitoring and Understanding a Dynamic Planet with Geodetic and Oceanographic Tools. Rizos, C., Tregoning, P. (Eds.), IAG Symposia 130, ISBN: 978-3-540-49349-5, 2007.
• M. Pearlman, Z. Altamimi, N. Beck, R. Forsberg, W. Gurtner, S. Kenyon, D. Behrend, F.G. Lemoine, C. Ma, C.E. Noll, E.C. Pavlis, Z. Malkin, A.W. Moore, F.H. Webb, R.E. Neilan, J.C. Ries, M. Rothacher, and P. Willis, GGOS Working Group on Networks, Communication, and Infrastructure, Dynamic Planet - Monitoring and Understanding a Dynamic Planet with Geodetic and Oceanographic Tools. Rizos, C., Tregoning, P. (Eds.) , IAG Symposia 130, ISBN: 978-3-540-49349-5, 2007.

2006

• C. Noll, CDDIS Brochure, 2006.
• A. Moore, C. Bruyninx, C. Noll, M. Scharber, "IGS Network & Data Center Position Paper, Darmstadt Workshop – May 2006" (PDF paper | .3 MB), at IGS 2006 Workshop, Darmstadt, Germany, May, 2006.

2005

• M. Pearlman, C. Noll, W. Gurtner, R. Noomen, "The International Laser Ranging Service and its Support for GGOS" (PDF paper .4 MB), at Dynamic Planet 2005, Cairns Australia, August 2005.
• M. Pearlman, et al, "GGOS Working Group on Ground Networks and Communication" (PDF paper .4 MB), at Dynamic Planet 2005, Cairns Australia, August 2005.

2002

• C. Noll, "Current Status of IGS Data Centers" at IGS Network, Data, and Analysis Center Workshop, Ottawa, Canada, April 2002
• C. Noll, "The IGS Global Data Center at the CDDIS – an Update" at IGS Network, Data, and Analysis Center Workshop, Ottawa, Canada, April 2002

2000

• "Current Status of and Backup Plans for Flow of IGS Data and Products" (PDF paper), at IGS Network Workshop, Oslo, Norway, July 2000.
• "The IGS Global Data Center at the CDDIS -- An Update" (PDF paper), at IGS Network Workshop, Oslo, Norway, July 2000.
• "DORIS Data Center at the CDDIS" (PDFpaper), in DORIS Days 2000, Toulouse, France, May 2000.

1999

• "IGEX-98 Data Flow" (PDF paper) in Proceedings from IGEX-98 Workshop, Nashville, TN, September, 1999.
• "The IGEX Data Center at the CDDIS" (PDF paper) in Proceedings from IGEX-98 Workshop, Nashville, TN, September, 1999.

1998

• "Data Center Issues", (PDF) position paper in Proceedings from IGS Network Systems Workshop
• "Recent Enhancements of the CDDIS" (PDF summary) in Proceedings from IGS Network Systems Workshop

1997

• "Flow of GPS Data and Products for the IGS, (PDF) presented at the IGS-PSMSL Workshop on Methods for Monitoring Sea Level, March 1997.

1996

• "Flow, Archiving, and Distribution of Global GPS Data and Products for the IGS and the Role of the Crustal Dynamics Data Information System (CDDIS)" (PDF paper), presented at the Workshop on Improving the DGPS Infrastructure for Earth and Atmospheric Science Applications, March 1996.

1995

• "Flow of Global GPS Data and Products from Station to User" (PDF paper), presented at Science Information Systems Interoperability Conference (SISIC), November 1995
  

Technical Reports/Other

2018

• "CDDIS Global Data Center Technical Report 2019" (PDF) in 2019 IGS Technical Report

2018

• "IDS Data Flow Coordination and CDDIS Data Center Report" (PDF) in 2018 IDS Annual Report
• "CDDIS Global Data Center Technical Report 2018" (PDF) in 2018 IGS Technical Report
• "CDDIS Data Center Summary" (PDF) in the IVS 2017–2018 Biennial Report
• IERS Annual Report 2018

2017

• "Warnings from the ionosphere", N. Vizcarra, in Sensing Our Planet: NASA Earth Science Research Features 2017, NASA, 2017
• "IDS Data Flow Coordination and CDDIS Data Center Report" (PDF) in 2017 IDS Annual Report
• "CDDIS Global Data Center Technical Report 2017" (PDF) in 2017 IGS Technical Report
• IERS Annual Report 2017

2016

• "Tracking the itinerant: Geodesists seek crazy precision in measuring sea level", A. Gautier, in Sensing Our Planet: NASA Earth Science Research Features 2016, NASA, 2016
• "IDS Data Flow Coordination and CDDIS Data Center Report" (PDF) in 2016 IDS Annual Report
• "CDDIS Global Data Center Technical Report 2016" (PDF) in 2016 IGS Technical Report
• "CDDIS Data Center Summary for the IVS 2015—2016 Biennial Report" (PDF), in IVS 2015—2016 Biennial Report
• IERS Annual Report 2016

2015

• "Rubble trouble: Laser tracking hones in on dangerous space debris", A. Gautier, in Sensing Our Planet: NASA Earth Science Research Features 2015, NASA, 2015
• "IDS Data Flow Coordination and CDDIS Data Center Report" (PDF) in 2015 IDS Annual Report
• "CDDIS Global Data Center Report" (PDF), in 2015 IGS Technical Report
• "IGS Data Center Working Group Report" (PDF), in 2015 IGS Technical Report
• IERS Annual Report 2015

2014

• "A speed bump in space-time: Can atomic clocks tell more than time?", J. Beitler, in Sensing Our Planet: NASA Earth Science Research Features 2014, NASA, 2014
• "IDS Data Flow Coordination and CDDIS Data Center Report" (PDF) in 2014 IDS Annual Report
• "CDDIS Global Data Center Report" (PDF), in 2014 IGS Technical Report
• "IGS Data Center Working Group Report" (PDF), in 2014 IGS Technical Report
• "CDDIS Data Center Summary for the IVS 2014 Annual Report" (PDF), in 2014 IVS Annual Report
• IERS Annual Report 2014

2013

• "Sizing a tsunami: GPS helps scientists quickly forecast massive waves", L. Naranjo, in Sensing Our Planet: NASA Earth Science Research Features 2013, NASA, 2013
• "IDS Data Flow Coordination and CDDIS Data Center Report" (PDF) in 2013 IDS Annual Report
• "CDDIS Global Data Center Report" (PDF), in 2013 IGS Technical Report
• "IGS Data Center Working Group Report" (PDF), in 2013 IGS Technical Report
• "CDDIS Data Center Summary for the IVS 2013 Annual Report" (PDF), in 2013 IVS Annual Report
• IERS Annual Report 2013

2012

• "Where on Earth?: Knowing exactly where you are isn't good enough for science", J. Beitler, in Sensing Our Planet: NASA Earth Science Research Features 2012, NASA, 2012
• "IDS Data Flow Coordination and CDDIS Data Center Report" (PDF) in 2012 IDS Annual Report
• "CDDIS Global Data Center Report" (PDF), in 2012 IGS Technical Report
• "IGS Data Center Working Group Report" (PDF), in 2012 IGS Technical Report
• "CDDIS Data Center Summary for the IVS 2012 Annual Report" (PDF), in 2012 IVS Annual Report
• IERS Annual Report 2012

2011

• "Looking for mud: Scientists stumble on a weird way to measure the moisture in soil", N. Vizcarra, in Sensing Our Planet: NASA Earth Science Research Features 2011, NASA, 2011
• "IDS Data Flow Coordination and CDDIS Data Center Report" (PDF) in 2011 IDS Annual Report
• "CDDIS Global Data Center Report" (PDF), in 2011 IGS Technical Report
• "IGS Data Center Working Group Report" (PDF), in 2011 IGS Technical Report
• "CDDIS Data Center Summary for the IVS 2011 Annual Report" (PDF), in 2011 IVS Annual Report
• IERS Annual Report 2011

2010

• "When a day is not a day", J. Beitler, in Sensing Our Planet: NASA Earth Science Research Features 2010, NASA, 2010
• "IDS Data Flow Coordination and CDDIS Data Center Report" (PDF) in 2010 IDS Annual Report
• "CDDIS Data Center Summary for the IVS 2010 Annual Report" (PDF), in 2010 IVS Annual Report
• IERS Annual Report 2010

2009

• "A snag in space-time", S. Renfrow, in Sensing Our Planet: NASA Earth Science Research Features 2009, NASA, 2009
• "IDS Data Flow Coordination and CDDIS Data Center Report" (PDF) in 2009 IDS Annual Report
• "CDDIS Data Center Summary for the IVS 2009 Annual Report" (PDF), in 2009 IVS Annual Report

2008

• "Earth’s crust in action", J. Beitler, in Sensing Our Planet: NASA Earth Science Research Features 2008, NASA, 2008
• "IDS Data Flow Coordination and CDDIS Data Center Report" (PDF) in 2008 IDS Annual Report
• "CDDIS Data Center Summary for the IVS 2008 Annual Report" (PDF), in 2008 IVS Annual Report

2007

• "CDDIS Data Center Summary for the IVS 2007 Annual Report" (PDF), in 2007 IVS Annual Report

2006

• "CDDIS Data Center Summary for the IVS 2006 Annual Report" (PDF), in 2006 IVS Annual Report

2005

• "IDS Data Flow Coordination and CDDIS Data Center Report" (PDF) in 2005 IDS Annual Report
• "CDDIS Data Center Summary for the 2005 IVS Annual Report" (PDF), in 2005 IVS Annual Report.

2004

• "CDDIS Data Center Summary for the 2004 IVS Annual Report" (PDF), in 2004 IVS Annual Report

2003

• "CDDIS Data Center Summary for the 2003 IVS Annual Report" (PDF), in 2003 IVS Annual Report
• "CDDIS Summary for the 2003 LTP Annual Report" (PDF), in 2003 LTP Annual Report

2002

• "CDDIS Data Center Summary for the 2002 IVS Annual Report" (PDF), in 2002 IVS Annual Report
• "CDDIS Global Data Center Report" (PDF), submitted to 2002 IGS Technical Report
• "IGS Data Center Report" (PDF), in 2002 IGS Annual Report
• "CDDIS Summary for the 2002 LTP Annual Report" (PDF), in 2002 LTP Annual Report

2001

• "CDDIS Data Center Summary for the 2001 IVS Annual Report" (PDF), in 2001 IVS Annual Report
• "CDDIS ILRS 2001 Global Data Center Report" (PDF), in 2001 ILRS Annual Report
• "CDDIS Global Data Center Report" (PDF), submitted to 2001 IGS Technical Report
• "IGS Data Center Report" (PDF), in 2001 IGS Annual Report
• "CDDIS Summary for the 2001 LTP Annual Report" (PDF), in 2001 LTP Annual Report

2000

• "CDDIS Global Data Center Report" (PDF), submitted to 2000 IGS Technical Report
• "IGS Data Center Report" (PDF), in 2000 IGS Annual Report
• "CDDIS Data Center Summary for the 2000 IVS Annual Report" (PDF), in 2000 IVS Annual Report
• "CDDIS ILRS 2000 Global Data Center Report" (PDF), in 2000 ILRS Annual Report

1999

• "CDDIS Data Center Summary for the 1999 IVS Annual Report" (PDF), in 1999 IVS Annual Report
• "CDDIS ILRS 1999 Global Data Center Report" (PDF), in 1999 ILRS Annual Report
• "IGS Data Center Report" (PDF), in 1999 IGS Annual Report
• "CDDIS Global Data Center Report" (PDF), submitted to 1999 IGS Technical Report

1998

• "IGS Data Center Report" (PDF), in 1998 IGS Annual Report
• "CDDIS Global Data Center Report" (PDF), in 1998 IGS Technical Report

1997

• "IGS Data Center Report" (PDF), in 1997 IGS Annual Report
• "CDDIS Global Data Center Report" (PDF), in 1997 IGS Technical Reports

1996

• "CDDIS Global Data Center Report" (PDF), in 1996 IGS Technical Reports