Multispectral Electro-Optical Stereo Scanner (MEOSS); an experimental CCD camera for remote sensing

The spectral dependence of the modulation transfer function of CCD cameras, angular dependence of spectral channels, channel separation, scanline generation, and image rectification are discussed. A camera to be flown on a Rohini mission is described. Five CCD's are aligned parallel and at equal distances on a plate positioned in the focal plane of a metric quality objective. This plate is connected to a radiation cooler. Small strips of spectral filters are positioned in a common filter plate behind the optics immediately in front of the CCD's. The outer two and the central CCD build up the stereoscopic camera. They have identical spectral filters. The three central CCD's have different spectral channels. Spectral channels are the same as used in LANDSAT-MSS. Orbit height is 400 km; stereo base length = 300 to 400 km; swath width = 200 to 400 km; ground pixel = 70 to 150 m; height resolution = 70 to 200 m.