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  • Amazon River, South America
  • Masthead platform instrument info SMAP/Radiometer
  • Masthead date range 26 August 2017

Amazon River Freshwater Discharge

This image shows derived sea surface salinity created from Soil Moisture Active Passive (SMAP) data. The black/blue ribbon stretching left to right across the center of the image is fresh water flowing from the Amazon River into the higher salinity (yellow/red) water of the Atlantic Ocean.

More about SMAP

Launched on January 31, 2015, NASA’s SMAP mission measures global soil moisture and freeze/thaw state in the top 5 cm (2 in) of soil. SMAP data also are used to produce derived sea surface salinity (SSS) observations for the world’s oceans.


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

Fires in the Okavango Delta, Botswana

Image captured on 17 June 2018, by the VIIRS instrument, on board the joint NOAA/NASA Suomi-NPP satellite.

A rising problem

Tackling Denver's ozone requires looking high and low.

NASA’s EOSDIS and the International Council for Science (ICSU) World Data System (WDS)

Through a shared objective of ensuring the free and open availability of Earth science data, NASA and the WDS are working together to improve international data stewardship, archiving, and use.

Nearly 20 Years of Change at Your Fingertips

Interactively explore your world your way with nearly 20 years of MODIS global imagery and the EOSDIS Worldview data visualization application.

User Profile: Dr. Pinki Mondal

Who uses NASA Earth science data? Dr. Pinki Mondal, to study the effects of climate change on agricultural systems and communities.

The EOSDIS Quarterly Update- Spring 2018 Newsletter is now online!

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

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 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.

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