| Abstract: | The methods of remote sensing techniques are reviewed with respect to their requirements for position and direction measurement. It is shown that there exist, or will exist in the near future, navigational satellite techniques which can offer extremely valuable performances. In particular the Global Positioning System (GPS) will be used for photogrammetry and remote sensing. Other tracking techniques which are complementary to GPS, such as precise range and range rate equipment (PRARE), will also be used in the future. This could improve GPS performance considerably, if integrated into the GPS satellite as a secondary ranging system. |
