Der Erdbeobachtungssensor MOMS-02. Semantische Systemvalidation und Kalibration

The second generation of the Modular Optoelectronic Multispectral/Stereo Scanner (MOMS-02) was flown within the frame of the German D2 mission aboard Space Shuttle flight STS-55. During the 9 days experiment (April to May 1993) approximately 8 mio. km"2 of data have been recorded in different modes. The newly designed sensor provides multispectral coverage in 4 bands within the VIS/NIR range. The objective of this investigations was to analyze MOMS-02 data for qualitative and quantitative parameters to assess the performance of the system. Results are discussed in relation to complimentary data from the operational sensors LANDSAT TM and SPOT HRV. Visual inspection and frequency analysis of the raw data indicated a number of distortions. Due to the different read-out of odd and even CCD's elements, a two line striping occurs parallel to the flight direction. A three line striping effect parallel to the scan direction is caused by a malfunction of the multiplexer. Most image distortions could be corrected by separating the striping pattern and applying a histogram matching algorithm. Since ideal Fourier filters using sharply defined cut-off frequencies produce interferences and spatial filters (low-pass) results in a loss of information, the remaining striping was accepted for further investigations. Corrected data were used for assessing the radiometric dynamic, entropy, spatial resolving power (line-spread-functions) and signal to noise ratios. Atmospheric correction was applied for quantification purposes of the spectral and spatial image information content. Transfer coefficients were calculated to estimate the radiometric dynamic using complimentary LANDSAT TM data. The radimetric dynamic indicates that the gain setting for band 3 and 4 have not been optimized. (orig./HK)SIGLEAvailable from TIB Hannover: RR 6134(97/01) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman