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  • Northern Hemisphere
  • Masthead platform instrument info DORIS Network Stations
  • Masthead date range April 2018

Global DORIS Network

Orange symbols show locations of Doppler Orbitography and Radio-positioning Integrated by Satellite (DORIS) sites. DORIS is a dual-frequency Doppler system consisting of a satellite receiver and ground beacons. NASA’s CDDIS supports the International DORIS Service (IDS) as a Global Data Center.

DORIS Data Support Precise Measurements

DORIS stations transmit signals to receivers aboard satellites that measure the Doppler-shifted signals. The measurements are used to support various applications, including precise orbits for altimetry measurements and sea level studies.

ACCESS NASA EARTH SCIENCE DATA

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

Wildfires in western Oklahoma

Image captured on 13 April 2018, by the MODIS instrument, on board the Terra satellite.

In Memoriam: Dr. Roger Barry (1935 - 2018)

The cryosphere expert and University of Colorado Distinguished Professor of Geography was the founding director of the National Snow and Ice Data Center (NSIDC).

User Profile: Dr. Joan Ramage

Who uses NASA Earth science data? Dr. Joan Ramage, to study glaciers and snowmelt.

FLASH - A New Source for Global Lightning Data is Now Available

Provisional data from the Lightning Imaging Sensor (LIS) aboard the International Space Station (ISS) are now available through NASA's GHRC DAAC and LANCE.

EOSDIS High Customer Satisfaction Continues

Results from the annual American Customer Satisfaction Index (ACSI) survey for 2017 indicate continued high levels of satisfaction with EOSDIS products and services.

The EOSDIS Quarterly Update- Winter 2017/2018 Newsletter is now online!

Find data set and data tool news, top stories, featured data images, webinars, data recipes, and data user profiles.

EOSDIS SIPS and their Role Ensuring Consistent Long-Term Global Observations of Atmospheric Ozone

The OMI and OMPS Science Investigator-led Processing Systems (SIPS) ensure that ozone data collected by instruments aboard the Aura and Suomi-NPP satellites reach global users.

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.

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.

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