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- W2157011266 abstract "Besides pre-launch and on-board calibration, the method of vicariously calibrating space sensors became a reliable tool for sensor calibration. One possibility of vicarious calibration is to inter-calibrate sensors aboard different satellite platforms directly. This leads to a better understanding of differences in global data sets, which are produced directly as products by these sensors. In the following, the capability of inter-satellite calibration is demonstrated using a snow target near Barrow, Alaska. It is shown, that at a polar sites the TOA radiance of different sensors, such as SeaWiFS, AHVRR and MERIS can be compared vicariously. Because of overlapping swaths the space sensors view the same target on the same day with small differences in the local crossing times. In the scope of this case study, SeaWiFS, AHVRR and MERIS datasets were selected for the following day: 28/29 March 2002 between 21:28 and 00:23 GMT. Additionally to the satellite data, ground-truth data were taken into account, assumptions about the atmosphere were made and differences in the sunground-satellite viewing geometry were accounted by means of radiative transfer code (RTC) calculations. This case study was carried out in the framework of AO-1107. The goal of this project is to compare, ENVISAT’s MERIS/AATSR and ADEOS-2’s GLI’s sensor output (e.g., TOA radiance). Since ADEOS-2 was launched just recently (14 Dec. 2002) the capability of this vicarious calibration approach was demonstrated using space sensor data from different satellites, i.e. SeaWiFS and AVHRR." @default.
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- W2157011266 date "2002-01-01" @default.
- W2157011266 modified "2023-09-23" @default.
- W2157011266 title "Satellite sensor inter-calibration - A case study for 28 March 2002 -" @default.
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