3D spatial data extract with extended DLT sensor model in pushbroom satellite imagery

In recent years, Satellite Photogrammetry is facing with the take-off stage by the operation of commercial high resolution satellite. Leading satellite, IKONOS, has produced a lot of remote sensing data since September in 1999. But Linear CCD image processing of IKONOS has difficult problems. IKONOS Satellite ancillary data are not offered, so we cannot establish rigorous sensor model based on physical condition. In addition, IKONOS level I image is inaccessible to the people at large, therefore we rely upon RPC (Rational Polynomial Coefficients) data and it is difficult for us to develop various sensor models for IKONOS. Abstract sensor model extended linear CCD DLT sensor model is introduced in this paper. This sensor model is developed to avoid existing problem of IKONOS image.