Data Set ID: 

SMAP L1C Radar Half-Orbit High-Resolution σo Data on 1 km Swath Grid, Version 1

This Level-1C (L1C) product provides time-ordered, parsed telemetry data retrieved by the Soil Moisture Active Passive (SMAP) radar during 6:00 a.m. descending and 6:00 p.m. ascending half-orbit passes. The major contents of the product are normalized radar cross section (sigma nought) measurements multilooked into 1 km square instrument swath-based grid cells where the center line of the grid corresponds to the path of the spacecraft nadir on the Earth’s surface.

NSIDC does not archive these data.

Version Summary: 

This version of the data set may not represent the most recent release. Users should visit the ASF DAAC to find the most up-to-date information; access is provided through the “Download Data” tab.

For the full major and minor version history, go to

  • Radar > Radar Backscatter > Sigma Nought
Data Format(s):
  • HDF5
Spatial Coverage:
N: 85.044, 
S: -85.044, 
E: 180, 
W: -180
Platform(s):SMAP Observatory
Spatial Resolution:
  • 1 km to 3 km x 1 km to 3 km
Sensor(s):SMAP L-Band Radar
Temporal Coverage:
  • 13 April 2015 to 7 July 2015
Temporal Resolution49 minuteMetadata XML:View Metadata Record
Data Contributor(s):West, R.

Geographic Coverage

Please contact the data provider for the correct Data Citation for this data set.
A user guide is not available for this data set.

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