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Exploring scaling issues by using NASA Cold Land Processes Experiment(CLPX-1, IOP3) radiometric dataThe NASA Cold-land Processes Field Experiment-1 (CLPX-1) involved several instruments in order to acquire data at different spatial resolutions. Indeed, one of the main tasks of CLPX-1 was to explore scaling issues associated with microwave remote sensing of snowpacks. To achieve this task, microwave brightness temperatures collected at 18.7, 36.5, and 89 GHz at LSOS test site by means of the University of Tokyo s Ground Based Microwave Radiometer-7 (GBMR-7) were compared with brightness temperatures recorded by the NOAA Polarimetric Scanning Radiometer (PSR/A) and by SSM/I and AMSR-E radiometers. Differences between different scales observations were observed and they may be due to the topography of the terrain and to observed footprints. In the case of satellite and airborne data, indeed, it is necessary to consider the heterogeneity of the terrain and the presence of trees inside the observed scene becomes a very important factor. Also when comparing data acquired only by the two satellites, differences were found. Different acquisition times and footprint positions, together with different calibration and validation procedures, can be responsible for the observed differences.
Document ID
20040171650
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Tedesco, Marco (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Kim, Edward J. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Cline, Don (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Graf, Tobias (Tokyo Univ. Japan)
Koike, Toshio (Tokyo Univ. Japan)
Armstrong, Richard (Colorado Univ. Boulder, CO, United States)
Brodzik, Mary (Colorado Univ. Boulder, CO, United States)
Stankov, Boba (National Oceanic and Atmospheric Administraion CO, United States)
Gasiewski, Al (National Oceanic and Atmospheric Administraion CO, United States)
Klein, Marian (National Oceanic and Atmospheric Administraion CO, United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 2004
Subject Category
Instrumentation And Photography
Distribution Limits
Public
Copyright
Public Use Permitted.

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