REFINED SIMULATION OF SATELLITE LASER ALTIMETER FULL ECHO WAVEFORM
- 1Collage of Engineering and Technology, Northeast Forestry University, China
- 2Satellite Surveying and Mapping Application Center, Beijing, China
- 3Satellite Forestry Application Center, State Forestry Administration, Beijing 100714, China
- 4Beijing SatImage Information Technology Co., Ltd, Beijing 100130, China
Keywords: Satellite laser altimetry, Waveform simulation, ICESat/GLAS, GF-7 satellite, LPA
Abstract. The return waveform of satellite laser altimeter plays vital role in the satellite parameters designation, data processing and application. In this paper, a method of refined full waveform simulation is proposed based on the reflectivity of the ground target, the true emission waveform and the Laser Profile Array (LPA). The ICESat/GLAS data is used as the validation data. Finally, we evaluated the simulation accuracy with the correlation coefficient. It was found that the accuracy of echo simulation could be significantly improved by considering the reflectivity of the ground target and the emission waveform. However, the laser intensity distribution recorded by the LPA has little effect on the echo simulation accuracy when compared with the distribution of the simulated laser energy. At last, we proposed a refinement idea by analyzing the experimental results, in the hope of providing references for the waveform data simulation and processing of GF-7 satellite in the future.