Data Set ID: 

SMAP L1A Radar Time-Ordered Parsed Telemetry, Version 1

This Level-1A (L1A) product provides all data downlinked from the Soil Moisture Active Passive (SMAP) radar during 6:00 a.m. descending and 6:00 p.m. ascending half-orbit passes. The product also contains information about the spacecraft position and attitude, as well as the antenna azimuth position over the same time period that the radar telemetry covers. The major contents of the product include high resolution synthetic aperture radar data, low resolution real aperture radar data, instrument loopback data, instrument health and status data, and standard operating conditions at antenna rotation granularity.

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.

How To

NSIDC DAAC Data Subscription Requests
Data subscriptions are available for select NSIDC DAAC data collections (found below). Our subscription service automatically sends you new data as they are delivered from active NASA satellite missions. The service cannot be applied to past data already archived at NSIDC. This service is... read more