DocumentCode :
2105316
Title :
SMOS performance simulation analysis
Author :
Camps, A. ; Zapata, M. ; Corbella, I.
Author_Institution :
Dept. Signal Theor. & Commun., Univ. Politecnica de Catalunya, Barcelona, Spain
Volume :
2
fYear :
2002
fDate :
24-28 June 2002
Firstpage :
841
Abstract :
In May 1999 the SMOS Earth Explorer mission was selected by ESA to provide global soil moisture and sea salinity maps. SMOS payload is MIRAS: an L-band 2D aperture synthesis interferometric radiometer, that generates brightness temperature images by processing the cross-correlations measured between the pairs of signals collected by each array element. In this paper we compare the results of the error budget used in previous SMOS studies to those obtained from a simulation campaign for different scenarios (brightness temperature input scenes). The total radiometric error, which includes the radiometric sensitivity term mainly due to the finite integration time, and the radiometric accuracy due to instrumental imperfections as well as residual calibration error, is computed from a series of 20 Monte Carlo simulations for each instrument configuration and scenario for both the brightness temperatures retrieved in the antenna reference frame (X- and Y-polarizations) and the Earth reference frame (V- and H- polarizations at each pixel). Finally, intercalibration instrumental drifts due to in-orbit temperature variations are analyzed using a standard configuration.
Keywords :
aerospace instrumentation; error analysis; hydrological equipment; moisture measurement; oceanographic equipment; radiometers; radiowave interferometers; remote sensing; soil; L-band 2D aperture synthesis interferometric radiometer; MIRAS; Monte Carlo simulations; SMOS Earth Explorer mission; SMOS performance simulation analysis; brightness temperature images; cross-correlations; error budget; global soil moisture maps; instrumental imperfections; integration time; radiometric accuracy; radiometric sensitivity term; residual calibration error; sea salinity maps; total radiometric error; Analytical models; Brightness temperature; Earth; Instruments; L-band; Payloads; Performance analysis; Radiometry; Signal synthesis; Soil moisture;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Geoscience and Remote Sensing Symposium, 2002. IGARSS '02. 2002 IEEE International
Print_ISBN :
0-7803-7536-X
Type :
conf
DOI :
10.1109/IGARSS.2002.1025703
Filename :
1025703
Link To Document :
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