Share Email Print

Proceedings Paper

New results of ground-target-based calibration of MOS on IRS
Author(s): Horst H. Schwarzer; Bryan A. Franz; Andreas Neumann; Karl-Heinz Suemnich; Thomas Walzel; Gerhard Zimmermann
Format Member Price Non-Member Price
PDF $17.00 $21.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

The success of the Modular Optoelectronic Scanner MOS on the Indian Remote Sensing Satellite IRS-P3 during the 6 years mission time has been based on its sophisticated in-orbit calibration concept to a large extent. When the internal lamp and the sun calibration failed in September 2000 we tested the possibility of ground target based (or vicarious) calibration of the MOS instruments to continue the high data quality. This is essential for future watching of global changes of the ocean coastal zones (phytoplancton, sediments, pollution, etc.) using spectral measurements of the VIS/NIR MOS spectral channels. The investigations have shown the suitability of a part of the Great Eastern Erg in the Sahara desert for this purpose. The satellite crosses this very homogeneous area every 24 days. Because of the good cloudfree conditions we can use 6 - 8 overflys a year for calibration. The seasonal variability of the surface reflectance is very small so that we obtain relative calibration data of sufficient accuracy even without ground truth measurements for most of the channels. The trend of this "vicarious" calibration corresponds very well with the previous trend of the failed lamp and sun calibration. Dfferences between the three methods will be discussed. In the paper we will also present the results of a comparison between SeaWiFS and MOS data of comparable spectral channels from the Great Eastern Erg area. They confirm the suitability of this area for calibration purposes too.

Paper Details

Date Published: 24 September 2002
PDF: 10 pages
Proc. SPIE 4814, Earth Observing Systems VII, (24 September 2002); doi: 10.1117/12.451501
Show Author Affiliations
Horst H. Schwarzer, DLR (Germany)
Bryan A. Franz, Science Applications International Corp. (United States)
Andreas Neumann, DLR (Germany)
Karl-Heinz Suemnich, DLR (Germany)
Thomas Walzel, DLR (Germany)
Gerhard Zimmermann, DLR (Germany)

Published in SPIE Proceedings Vol. 4814:
Earth Observing Systems VII
William L. Barnes, Editor(s)

© SPIE. Terms of Use
Back to Top