Band to Band Registration of MOMS-2P Camera

Abstract

The Modular Optoelectronic Multispectral Scanner MOMS-2P is collecting digital multispectral and threefold along track stereoscopic imagery of the earth´s surface from the PRIRODA module of the Russian space station MIR since September 1996. The paper describes that part of the geometric inflight calibration which deals with the multispectral imaging modes to guarantee band to band registration. The procedure is based on DLR matching software and is restricted to nadir looking channles, which are read out simultaneously. From very many individual point matches between the images of the same area taken by the different CCD arrays the most reliable ones are specially subselected and used to calculate shifts with components in and across flight direction between the CCD arrays. These actual shifts are compared to the nominal shifts, derived from the results of the laboratory calibration, and parameters of the valid camera model are estimated from both data sets by least squares adjustment. A special case of band to band registration are the two optically combined CCD-arrays of the high resolution channels. They are read out simultaneously with a nominal 10 pixel overlap in stereoscopic imaging mode A. The DLR matching software is applied to calculate the displacement vector between the two CCD-arrays.