Experiments on the measurement precision of asynchronous respond laser ranging

Compared with the traditional reflective laser ranging, the asynchronous respond laser ranging can greatly enhance the functional distance of the satellite laser ranging, and realize the measurement of satellite- ground clock offset, in which the receiving laser power of asynchronous respond laser ranging is inversely proportional to the square of distance. This new method, looked as an important study direction since being put forward, has not been used in satellite laser ranging wildly yet. For validating the new way's feasibility on engineering and controlling the measurement precision, the ground verifying experiment was designed and proceeded. In the experiment, two lasers on the ground were used to simulate the terminals of earth station and the spacecraft respectively and analog satellite-ground asynchronous respond laser ranging in real condition. The experimental result shows that the asynchronous respond laser ranging system is feasible. It can be used to accurately measure the distance and the clock offset between two terminals. The accuracy of the new method locates between the accuracy of reflective ranging of both terminals.