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Description

This data set contains satellite-retrieved geophysical parameter files generated from the Advanced Microwave Scanning Radiometer - Earth Observing System (AMSR-E) instrument on the National Aeronautics and Space Administration (NASA) Aqua satellite and the Advanced Microwave Scanning Radiometer 2 (AMSR2) sensor on the JAXA GCOM-W1 satellite. The geophysical parameters include daily air surface temperature, fractional open water cover estimates, vegetation optical depth, surface volumetric soil moisture, and atmosphere total column precipitable water vapor. The global retrievals were derived over land for non-precipitating, non-snow, and non-ice covered conditions.

Version Description

Temporal coverage extends through 31 December 2023; Precipitable Water Vapor algorithm refined to account for cloud liquid water and surface terrain effects; Precipitable Water Vapor algorithm improved through calibration against similar AIRX2RET version 6 retrievals; Refined estimation of Tmx and Tmn considers terrain and latitude effects; Addition of daily surface atmospheric vapor pressure deficit land parameter derived from AMSR LPDR surface temperature and PWV retrievals. - X-band (10.7 GHz) retrieval improved using weighted averaging and dymanic selection of vegetation scattering albedo effects - Updated Freeze/Thaw frozen QC flag. In this version, QC flag set for a given date and pixel where frozen condition is detected from either afternoon or morning AMSR observations

Product Summary

Platforms
Aqua ,
GCOM-W1
Instruments
AMSR-E ,
AMSR2
Spatial Extent

N: 90 S: -90 E: 180 W: -180

Spatial Resolution
25 Kilometers x 25 Kilometers
Spatial Reference System(s)
NSIDC EASE-Grid Global (EPSG:3410)
Location
GLOBAL ,
GLOBAL LAND
Coordinate System
CARTESIAN
Granule Spatial Representation
GEODETIC
Temporal Extent
2002-06-19 to 2023-12-31
Temporal Resolution
1 Day
Concept ID
C2101849384-NSIDCV0
Data State
COMPLETE
Number of Files/Granules
0
Processing Level
1
Published
Updated
Science Keywords
Air Temperature ,
Soil Moisture/Water Content ,
Surface Water ,
Total Precipitable Water ,
Vegetation Index

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

Du, Jinyang, & Kimball, John. (2021). Daily Global Land Parameters Derived from AMSR-E and AMSR2, Version 3 [Data set]. NASA National Snow and Ice Data Center Distributed Active Archive Center. https://doi.org/10.5067/WPXUQ72A4484 Date Accessed: 2026-11-05

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