Data Set ID: 
SPL1BTB

SMAP L1B Radiometer Half-Orbit Time-Ordered Brightness Temperatures, Version 3

This Level-1B (L1B) product provides calibrated estimates of time-ordered geolocated brightness temperatures measured by the Soil Moisture Active Passive (SMAP) passive microwave radiometer. SMAP L-band brightness temperatures are referenced to the Earth's surface with undesired and erroneous radiometric sources removed.

Version Summary: 

Changes to this version include:

  • Updated reflector thermal model
  • Reflector emissivity value back to baseline
  • All calibration coefficients updated back to 3/31/15
  • Direct Galaxy quality flag changed: set when s/c nadir is greater than 5 degrees
  • Reflected Sun quality flag changed: set when specular solar theta is less than 15 degrees
  • Sea ice fraction computation implemented

Geographic Coverage

Parameter(s):
  • Microwave > Antenna Temperature
  • Microwave > Brightness Temperature
Spatial Coverage:
N: 86.4, 
S: -86.4, 
E: 180, 
W: -180
Spatial Resolution:
  • 47 km x 36 km
Temporal Coverage:
  • 31 March 2015
Temporal Resolution: 49 minute
Data Format(s):
  • HDF5
Platform(s) SMAP Observatory
Sensor(s): SMAP L-BAND RADIOMETER
Version: V3
Data Contributor(s): Piepmeier, J. R., P. Mohammed, J. Peng, E. J. Kim, G. De Amici, and C. Ruf.

Data Citation

As a condition of using these data, you must cite the use of this data set using the following citation. For more information, see our Use and Copyright Web page.

Piepmeier, J. R., P. Mohammed, J. Peng, E. J. Kim, G. De Amici, and C. Ruf. 2016. SMAP L1B Radiometer Half-Orbit Time-Ordered Brightness Temperatures, Version 3. [Indicate subset used]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. doi: https://doi.org/10.5067/YV5VOWY5V446. [Date Accessed].
A user guide is not available for this data set.

FAQ

What are the latencies for SMAP radiometer data sets?
The following table describes both the required and actual latencies for the different SMAP radiometer data sets. Latency is defined as the time (# days, hh:mm:ss) from data acquisition to product generation. Short name Title Latency Required Actual (mean1) SPL1AP SMAP L1A... read more

How To

How do I visualize SMAP data in Worldview?
This video tutorial provides step-by-step instructions on how to visualize SMAP data in Worldview (http://worldview.earthdata.nasa.gov/). NASA Worldview is a map-based application... read more
How do I search, order, and customize SMAP data using Earthdata Search?
These video tutorials and attached PDF document provides step-by-step instructions on how to search, order, and customize SMAP data using Earthdata Search (https://search.earthdata.nasa.gov/). NASA Earthdata search provides... read more
How do I programmatically access data using spatial and temporal filters?
The Common Metadata Repository (CMR) is a high-performance metadata system that provides search capabilities for data at NSIDC. A synchronous REST interface was developed which utilizes the CMR API, allowing you to ... read more