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Description

This enhanced Level-1C (L1C) product contains calibrated, geolocated, brightness temperatures acquired by the Soil Moisture Active Passive (SMAP) radiometer during 6:00 a.m. descending and 6:00 p.m. ascending half-orbit passes. This product is derived from SMAP Level-1B (L1B) interpolated antenna temperatures. Backus-Gilbert optimal interpolation techniques are used to extract maximum information from SMAP antenna temperatures and convert them to brightness temperatures, which are posted to a 9 km Equal-Area Scalable Earth Grid, Version 2.0 (EASE-Grid 2.0) in three projections: global cylindrical, Northern Hemisphere azimuthal, and Southern Hemisphere azimuthal.

Version Description

First public data release

Product Summary

Platforms
SMAP
Instruments
SMAP L-BAND RADIOMETER
Spatial Extent

N: 85.044 S: -85.044 E: 180 W: -180

Spatial Resolution
9 Kilometers x 9 Kilometers
Location
GLOBAL LAND
Coordinate System
CARTESIAN
Granule Spatial Representation
GEODETIC
Temporal Extent
2015-03-31 to 2018-06-04
Temporal Resolution
49 Minute
Concept ID
C2830467781-NSIDC_CPRD
Data State
DEPRECATED
Number of Files/Granules
0
Processing Level
1C
Published
Updated
Science Keywords
Brightness Temperature

Citation

Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.

Copy Citation

Chaubell, J., Chan, S., Dunbar, R., Peng, J., & Yueh, S. (2016). SMAP Enhanced L1C Radiometer Half-Orbit 9 km EASE-Grid Brightness Temperatures, Version 1 [Dataset]. NASA National Snow and Ice Data Center Distributed Active Archive Center. https://doi.org/10.5067/2C9O9KT6JAWS Date Accessed: 2026-10-09

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Publications Citing This Dataset

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Title Authors Year Referenced Datasets
Assessment of Surface Fractional Water Impacts on SMAP Soil Moisture Retrieval
  • Du, Jinyang, Kimball, John S., Chan, Steven K., Chaubell, Mario Julian, Bindlish, Rajat, Dunbar, R. Scott, Colliander, Andreas
Observed landscape responsiveness to climate forcing
  • Feldman, Andrew F., Short Gianotti, Daniel J., Trigo, Isabel F., Salvucci, Guido D., Entekhabi, Dara
Error propagation in microwave soil moisture and vegetation optical depth retrievals
  • Feldman, Andrew, Chaparro, David, Entekhabi, Dara
Satellite-Based Assessment of Land Surface Energy Partitioning-Soil
  • Feldman, Andrew F., Short Gianotti, Daniel J., Trigo, Isabel F., Salvucci, Guido D., Entekhabi, Dara
Improving brightness temperature measurements near coastal areas for SMAP
  • Chaubell, Julian, Yueh, Simon H., Peng, Jinzheng, Dunbar, R. Scott, Chan, Steven K., Chen, Fan, Piepmeier, Jeffrey R., Bindlish, Rajat, Entekhabi, Dara, O'Neill, Peggy E.
Smap Microwave Radiometer: Instrument Status and Calibration for the First Three Years of Operation
  • Piepmeier, Jeffrey R., Peng, Jinzheng, Misra, Sidharth, Dinnat, Emmanuel P., Yueh, Simon H., Meissner, Thomas, Vine, David M. Le, Shelton, Kacie E., Freedman, Adam P., Dunbar, R. Scott, Chan, Steven K., Chaubell, Julian, Bindlish, Rajat, De Amici, Giovanni, Mohammed, Priscilla N., Hong, Liang
An assessment of the differences between spatial resolution and grid size for the SMAP enhanced soil moisture product over homogeneous sites
  • Colliander, A., Jackson, T.J., Chan, S.K., O'Neill, P., Bindlish, R., Cosh, M.H., Caldwell, T., Walker, J.P., Berg, A., McNairn, H., Thibeault, M., Martinez-Fernandez, J., Jensen, K.H., Asanuma, J., Seyfried, M.S., Bosch, D.D., Starks, P.J., Holifield Collins, C., Prueger, J.H., Su, Z., Lopez-Baeza, E., Yueh, S.H.
Estimating surface soil moisture from SMAP observations using a Neural Network technique
  • Kolassa, J., Reichle, R.H., Liu, Q., Alemohammad, S.H., Gentine, P., Aida, K., Asanuma, J., Bircher, S., Caldwell, T., Colliander, A., Cosh, M., Holifield Collins, C., Jackson, T.J., Martinez-Fernandez, J., McNairn, H., Pacheco, A., Thibeault, M., Walker, J.P.
Moisture pulse-reserve in the soil-plant continuum observed across biomes
  • Feldman, Andrew F., Short Gianotti, Daniel J., Konings, Alexandra G., McColl, Kaighin A., Akbar, Ruzbeh, Salvucci, Guido D., Entekhabi, Dara
Smap-based retrieval of vegetation opacity and albedo
  • Entekhabi, Dara, Konings, Alexandra, Piles, Maria, Das, Narendra
L-band vegetation optical depth and effective scattering albedo estimation from SMAP
  • Konings, Alexandra G., Piles, Maria, Das, Narendra, Entekhabi, Dara
Backus-Gilbert optimal interpoaltion applied to enhance smap data: Implementation and assessment
  • Chaubell, J., Chan, S., Dunbar, R., Entekhabi, D., Peng, J., Piepmeier, J., Yueh, S.
Blended SMOS-SMAP SSS product in marginal seas
  • Martinez, Justino, Olmedo, Estrella, Gonzalez-Gambau, Veronica, Turiel, Antonio, Yueh, Simon
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