ADC - Eine digitale Zeilenkamera für Photogrammetrie und Fernerkundung

Abstract

LH Systems’ new ADS40 Airborne Digital Sensor was introduced at the XIXth ISPRS Congress in Amsterdam in July 2000. The ADS40 project is a joint one with Deutsches Zentrum für Luft- und Raumfahrt (German Aerospace Centre – DLR). The ADS40 is designed to combine the geometric accuracy of photogrammetry with the spectral information required in remote sensing. The new system is based on the three-line-scanner principle, whereby panchromatic linear arrays capture high resolution views of the terrain looking forwards, nadir and backwards from the aircraft. These are comple-mented by four further arrays acquiring color and near infrared data. The performance of the carefully selected filters for these multispectral bands is optimized by a novel, spe-cially designed, telecentric lens. The ADS40 includes a Position and Orientation System from Applanix Corporation, which uses GPS and inertial sub-systems to record the posi-tion and attitude of the sensor during flight. Data are recorded in-flight on a rugged, high capacity Mass Memory System. Extensive software has been prepared to process the raw data to enable all photogrammetric and remote sensing processes to be carried out. The processing includes an initial rectification of the raw data using data from the Position and Orientation System, followed by aerotriangulation. Thereafter photogram-metric and remote sensing processing continues in the normal way, except that the avail-ability of three panchromatic views is expected to increase the robustness and accuracy of image matching operations.