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  • Masthead platform instrument info GNSS network
  • Masthead date range November 2016

Global Real-Time GNSS Network

NASA’s Crustal Dynamics Data Information System (CDDIS) supports the International GNSS Service (IGS) Real-Time Service. The symbols on this map indicate the current locations of Global Navigation Satellite System (GNSS) sites providing real-time “streams.”

Real-Time GNSS Data and Products

The CDDIS “caster” disseminates both data and derived products, such as corrections for GNSS satellite orbits and clocks in real-time. These data and products enable precise point positioning and related applications such as time synchronization and disaster monitoring.

About EOSDIS

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.

In the Arctic darkness

Beneath a frozen surface, stirrings.

EOSDIS releases new Handbook

EOSDIS releases the EOSDIS Handbook with the purpose of describing EOSDIS’s functions, architecture and information model.

The NASA Booth is Your Home for Earth Science Data and Information at the 49th AGU Fall Meeting

Going to the AGU Fall Meeting? Be sure to stop by the NASA Booth!

Lake Manicouagan, Quebec, Canada

Image captured on 3 December 2016 by the MODIS instrument, on board the Terra satellite.

Earthdata Developer Portal

The newly released Earthdata Developer Portal is for application developers who wish to build applications that search, access, and browse NASA’s Earth science data.

Tracking Ocean Currents from Space: A New Application of GRACE Data

A team of NASA and university scientists has developed a new way to use measurements from NASA's GRACE mission to track changes in Atlantic Ocean currents.

User Profile: Dr. Anne Nolin

Who uses NASA Earth science data? Dr. Anne Nolin, to study mountain ecosystems.

NASA EOSDIS Role in the Big Earth Data Initiative

NASA's EOSDIS plays a key role in coordinating the federal Big Earth Data Initiative (BEDI), which aims to make federal civil Earth observing data more discoverable, usable, and accessible.

Explore Current Natural Hazards with the new NASA Worldview/EONET Events Feature

Imagery and information about current natural hazard events are only a click away thanks to a collaboration between Worldview and the Earth Observatory Natural Event Tracker (EONET).

Collaborate With Us

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

  1. Welcome to Earthdata 3.0

    Enter your search term to search datasets, news, and articles.

  2. Science Disciplines

    Browse by science discipline to see available measurements and supporting DAACs.

  3. News & Events

    Click on one of these filters to see news & events specifically related to your selection.

  4. Collaborate

    Collaborate with us through our API & program access points.

  5. Feedback Module

    Have a question or comment? Send us your feedback and we'll get back to you as soon as we can.

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