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Soil Moisture Active Passive


Designation 40376 / 15003A
Launch date 31 Jan 2015
Country of origin United States
Mission Remote sensing
Perigee/Apogee 685 km sun-synchronous
Period 98.5 min (8-day repeat)
Launch vehicle Delta 2 #370

Managed by NASA's JPL. Continues work started by SMOS.

Data from SMAP will be used to enhance understanding of processes that link the water, energy and carbon cycles, and to extend the capabilities of weather and climate prediction models including improved flood prediction and drought monitoring capabilities.

Will study the Earth's top 5 cm. It also will detect and map whether the ground is frozen or thawed. This data will be used to enhance scientists' understanding of the processes that link Earth's water, energy and carbon cycles.

SMAP radar failed on 7 July 2015, not recoverable.

External resources


sat-index articles

n2yo.com tracking

Technical data


Prime contractor JPL
Mass at launch 944 kg
Dry mass  
Solar array  
DC power  
Design lifetime 3 years

SAR L-band antenna is 6m diameter.

Carries 2 main instruments: active radar and a passive radiometer.
1000km swath width

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