13 November 1996 Calibration of the Modular Optoelectronic Scanner (MOS) flight models
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Since March 1996 the Modular Optoelectronic Scanner (MOS) provides remote data from a 820 km sun synchroneous polar orbit. It measures the spectral radiance of the atmosphere- surface system in 18 spectral channels and up to 420 pixels in a 200 km swath. MOS consists of two imaging spectrometers A and B with gratings and a camera C with an interference filter. MOS-AA has 4 channels with a spectral halfwidth (Delta) (lambda) approximately equals 1.4 nm in the absorption band of atmospheric oxygen near 760 nm, MOS-B has 13 channels between 400 and 1010 nm with (Delta) (lambda) approximately equals 10 nm and the MOS-C channel is at 1.6 micrometers with (Delta) (lambda) approximately equals 100 nm. Beside the on ground laboratory calibration as the basis of calculating the spectral radiance of the earth objects, the long time mission requires a periodic recalibration or at least a stability check of instrument properties in orbit to support the reliability of the remote data. Internal lamps and the extraterrestric sun radiation provide actual data sets to derive corrections on remote data if any changes in the performance data arises.
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Karl-Heinz Suemnich, Karl-Heinz Suemnich, Andreas Neumann, Andreas Neumann, Horst H. Schwarzer, Horst H. Schwarzer, Gerhard Zimmermann, Gerhard Zimmermann, } "Calibration of the Modular Optoelectronic Scanner (MOS) flight models", Proc. SPIE 2819, Imaging Spectrometry II, (13 November 1996); doi: 10.1117/12.258083; https://doi.org/10.1117/12.258083

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