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  • Northern Hemisphere
  • Masthead platform instrument info ILRS Network Stations
  • Masthead date range October 2017

ILRS Network (Northern Hemisphere Stations)

Icons on this map show Satellite Laser Ranging (SLR) sites in the International Laser Ranging Service (ILRS) Network. Over 120 ILRS participants met in Riga, Latvia, in October to discuss SLR requirements, mission support, network performance improvements, and system automation developments.

About SLR

Satellite laser ranging (SLR) stations use short-pulse lasers, optical receivers, and timing electronics to measure the two-way time of flight from ground stations to retroreflector arrays on Earth-orbiting satellites and the Moon. NASA’s CDDIS archives and distributes SLR data and derived products.


NASA's data policy ensures that all NASA data are available fully, openly, and without restrictions. Here's what this means to you.


The Earth Observing System Data and Information System is a key core capability in NASA’s Earth Science Data Systems Program. It provides end-to-end capabilities for managing NASA’s Earth science data from various sources—satellites, aircraft, field measurements, and various other programs.

Dust Storm off southern Alaska

Image captured on 18 November 2017, by the MODIS instrument, on board the Aqua satellite.

User Profile: Brian Knosp

Who uses NASA Earth science data? Brian Knosp, to improve Earth observing data products and systems.

AppEEARS 2.0: New Features and Data to Further Improve User Workflow Efficiency

The latest enhancements to the AppEEARS program provide access to more datasets along with greater flexibility for working with Earth observing data from NASA and other federal data archives.

The EOSDIS Quarterly Update- Fall 2017 Newsletter is now online!

The EOSDIS Newsletter features data set and data tool news, and highlights our top stories, featured data images, webinars, data recipes, and data user profiles.

Tracking the itinerant

Geodesists seek crazy precision in measuring sea level.

The Global Change Master Directory: Data, Services, and Tools Serving the International Science Community

Over more than a quarter-century, the GCMD has evolved into the primary international resource for discovering Earth science and environmental data collections.

MOPITT Data now Available in LANCE

Global carbon monoxide data from the MOPITT instrument aboard NASA’s Terra satellite are the newest near real-time products available through the Land, Atmosphere Near real-time Capability for EOS (LANCE) system.

Getting Ready for NISAR—and for Managing Big Data using the Commercial Cloud

The upcoming NISAR satellite mission is expected to add as much as 85 TB of data each day to the EOSDIS archive. The commercial cloud is being explored as a way to archive and disseminate this extremely high volume of data efficiently.

Earth Science Data in the Cloud: The EOSDIS Cumulus Project

As part of the ongoing evolution of EOSDIS data and services, testing and prototyping are underway to see how DAAC data collections can be archived and disseminated using the commercial cloud.

News & Events

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EOSDIS has several channels that allow collaboration with the scientific community, EOSDIS data holdings and directly with NASA.

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