Skip to main content

Description

Each Level-1A (L1A) granule incorporates all radiometer data downlinked from the Soil Moisture Active Passive (SMAP) spacecraft for one specific half orbit. The data are scaled instrument counts consisting of the first four raw moments of the fullband channel (vertical and horizontal polarizations); the complex cross-correlations of the fullband channel; and the 16 subband channels (vertical and horizontal polarizations).

Version Description

Changes to this version include:
  • Transitioned to Validated-Stage 2
  • Calibration parameters were adjusted to reduce calibration jumps and drift previously present in the Beta-release; as a result, calibration now meets its less than 0.4 K/month stability back to 31 March 2015
  • Additional bit-error checking was performed on Level-0 instrument telemetry
For the full major and minor version history, go to https://nsidc.org/data/smap/version-history

Product Summary

Platforms
SMAP
Instruments
SMAP L-BAND RADIOMETER
Spatial Extent

N: 86.4 S: -86.4 E: 180 W: -180

Spatial Resolution
40 Kilometers x 40 Kilometers
Location
GLOBAL LAND
Coordinate System
CARTESIAN
Granule Spatial Representation
GEODETIC
Temporal Extent
2015-03-31 to Present
Temporal Resolution
49 Minute
Concept ID
C2938661641-NSIDC_CPRD
Data State
ACTIVE
Number of Files/Granules
120251
Processing Level
1A
Published
Updated
Science Keywords
Sensor Counts

Documents

No Results

QUESTIONS & SUPPORT

Have a question?

Get help with NASA Earth science data, datasets, tools, services, and metadata on the Earthdata Forum. Experienced staff in the data user community review and answer questions.

Get help on Earthdata Forum
Earthdata
Forum

Publications Citing This Dataset

Filters
Title Authors Year Referenced Datasets
Microwave Radiometer Calibration Using Deep Learning With Reduced Reference Information and 2-D Spectral Features
  • Alam, Ahmed Manavi, Kurum, Mehmet, Ogut, Mehmet, Gurbuz, Ali C.
Characteristics of radio frequency interference in the protected portion of L-band
  • Aksoy, Mustafa, Rajabi, Hamid
You're viewing 2 of 2