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Crustal Dynamics Data Information System (CDDIS)

  1. Earth Observing System Data and Information System (EOSDIS)
  2. EOSDIS Distributed Active Archive Centers (DAACs)
  3. Crustal Dynamics Data Information System (CDDIS)
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NASA's Crustal Dynamics Data Information System (CDDIS) is NASA’s data archive and information service supporting the international space geodesy community. CDDIS is part of the Earth Sciences Division at NASA's Goddard Space Flight Center in Greenbelt, MD. CDDIS serves as one of the core components for the geometric services established under the International Association of Geodesy (IAG), an organization that promotes scientific cooperation and research in geodesy on a global scale. CDDIS provides continuous, long term, public access to the data and derived products from a global network of observing stations equipped with one or more of the following measurement techniques:

  • Global Navigation Satellite System (GNSS),
  • Satellite Laser Ranging (SLR),
  • Lunar Laser Ranging (LLR),
  • Very Long Baseline Interferometry (VLBI), and
  • Doppler Orbitography and Radiopositioning Integrated by Satellite (DORIS)

The figure illustrates the global networks of geodetic sites which consist of 440 GNSS receivers, 44 laser ranging sites, 45 VLBI stations, and 58 DORIS sites and provides the means of determining an accurate and global Terrestrial Reference Frame. Courtesy: CDDIS
The figure illustrates the global networks of geodetic sites which consist of 440 GNSS receivers, 44 laser ranging sites, 45 VLBI stations, and 58 DORIS sites and provides the means of determining an accurate and global Terrestrial Reference Frame. Courtesy: CDDIS

Contact Information

Patrick Michael, Ph.D, DAAC Manager
Rebecca Limbacher, DAAC Operations Lead
James Roark, DAAC Systems Engineer
Lori Tyahla, User Services

NASA GSFC
Code 690.1
Greenbelt, MD 20771

https://cddis.nasa.gov/archive/

FTP: ftp://cddis.gsfc.nasa.gov

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Visit the DAAC: https://cddis.nasa.gov

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Geodesy Data

CDDIS also provides products derived from these data required for a variety of science observations, including the determination of a global terrestrial reference frame and geodetic studies in plate tectonics, earthquake displacements, volcano monitoring, Earth orientation, and atmospheric angular momentum, among others.

Users can access the data and products available through CDDIS via anonymous FTP.

Access the Earthdata Forum for questions and answers on geodesy data.


DAAC fact sheet:

CDDIS one pager

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Page Last Updated: May 25, 2021 at 4:04 PM EDT

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