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  • Gulf of Mexico
  • Masthead platform instrument info SMAP/Radiometer
  • Masthead date range 28 August 2017

Sensing Sea Surface Salinity

Blue/purple colors along the Texas/Louisiana/Mississippi coast (top of image) are areas of lower sea surface salinity following the passage of Hurricane Harvey. Red/orange colors to the south are areas of higher salinity.

Using SMAP to Sense Sea Surface Salinity

NASA’s Soil Moisture Active Passive (SMAP) mission was designed to sense terrestrial soil moisture. By applying NASA’s salinity retrieval algorithm to SMAP’s radiometer data, it also can be used to sense sea surface salinity. SMAP salinity data are archived and distributed by NASA's PO.DAAC.


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.

Webinar: Learn How to Subset Ozone Monitoring Instrument (OMI) Ozone Data with the GES DISC Level 2 Data Subsetter

Event Date: March 28, 2018

Join us to learn how to use the NASA GES DISC Level 2 Subsetter to subset NO2 and SO2 ozone swath data from the NASA Ozone Monitoring Instrument (OMI)!

The Grand Canyon from space

Image captured on 9 March 2018, by the MODIS instrument, on board the Terra satellite.

Warnings from the ionosphere

GPS may be able to pace tsunamis.

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.

User Profile: Dr. Kristine M. Larson

Who uses NASA Earth science data? Dr. Kristine M. Larson, to explore new ways of using remote sensing technologies.

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.

News & Events

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