AbstractIn order to obtain the individual directions of the paths to the satellite, the ray bundle defined by the corrected photo co-ordinates and the focal length of the camera must be converted by a space transform into the“passpoint”system of the fixed stars given by the right ascension/declination system. This problem of the spatial rotation of a ray bundle has been much examined in photogrammetry in recent years. We refer the reader to the comprehensive index of literature contained in [49].