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Evaluation of the AMSR-E Data Calibration Over LandLand observations by the Advanced Microwave Scanning Radiometer for the Earth Observing System (AMSR-E), particularly of soil and vegetation moisture changes, have numerous applications in hydrology, ecology and climate. Quantitative retrieval of soil and vegetation parameters relies on accurate calibration of the brightness temperature measurements. Analyses of the spectral and polarization characteristics of early versions of the AMSR-E data revealed significant calibration biases over land at 6.9 GHz. The biases were estimated and removed in the current archived version of the data Radiofrequency interference (RFI) observed at 6.9 GHz is more difficult to quanti@ however. A calibration analysis of AMSR-E data over land is presented in this paper for a complete annual cycle from June 2002 through September 2003. The analysis indicates the general high quality of the data for land applications (except for RFI), and illustrates seasonal trends of the data for different land surface types and regions.
Document ID
20040121122
Document Type
Preprint (Draft being sent to journal)
Authors
Njoku, E. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Chan, T. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Crosson, W. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Limaye, A. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
August 22, 2013
Publication Date
January 1, 2004
Subject Category
Earth Resources and Remote Sensing
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.