24 September 1999 Three years of successful in-orbit calibration of the modular optoelectronic scanner (MOS) on the Indian IRS-P3 mission
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Abstract
The Modular Optoelectronic Scanner MOS of the German Aerospace Center (DLR) has now been working about three years on board the INdian Remote Sensing Satellite IRS-P3 very successfully. It consists of three instruments: the spectrometer MOS-A, the spectrometer MOS-B and the camera MOS-C. To meet the sophisticated radiometric and spectral requirements especially for ocean purposes, a 16 bit dynamic range and a qualified in-flight calibration concept including sun calibration and internal lamp calibration have been established. All three instruments have shown a remarkably high data stability and quality during the three years mission time. The highest changes of radiometric sensitivity of +7 percent were found in the SWIR- channels of MOS-B and the lowest changes of -1 percent in the MOS-A channels. Spectral shifts of center wavelengths could not be found. Small differences between the result of the two calibration methods are due to the fact that they do not cover the same optimal components exactly. But this enables us to allocate the sensitivity changes to those components of the instruments which cause them. The measured in-orbit calibration values were used to update the calibration coefficients.
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Horst H. Schwarzer, Horst H. Schwarzer, Karl-Heinz Suemnich, Karl-Heinz Suemnich, Andreas Neumann, Andreas Neumann, Thomas Walzel, Thomas Walzel, Gerhard Zimmermann, Gerhard Zimmermann, "Three years of successful in-orbit calibration of the modular optoelectronic scanner (MOS) on the Indian IRS-P3 mission", Proc. SPIE 3750, Earth Observing Systems IV, (24 September 1999); doi: 10.1117/12.363542; https://doi.org/10.1117/12.363542
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