激光站在星载雷达高度计绝对定标中的应用

推导了一般情况下激光站为星载雷达高度计进行绝对定标的数学模型，并进行了仿真验证和误差分析，对高度计定标精度进行了定量评估。利用Corsica定标场区中Grasse激光站对Jason-2卫星定轨的实测数据进行了分析，取得了满意的结果。

Application of Laser Tracking Technology to Absolute Calibration of Space-borne Radar Altimeters

Space-borne radar altimeter can measure a majority of the global sea surface height within an accuracy of few centimeters, but there are various errors in altimetry measurements, so absolute calibration activities must be carried out. Ground laser station has range accuracy better than 1 cm, so it can serve for the independent calibration combined with the space-borne laser reflector array (LRA). In this paper, the general model of the laser calibration for space-borne altimeter was deduced, which was not presented in the relevant publications. Afterwards, simulations and error analysis were executed based on the model, and the calibration precision was estimated quantificationally. In particular, the Grasse laser observations (actual laser echoes from the Jason-2 satellite LRA) in the vicinity of the Corsica calibration site were analyzed, and the results were promising. Finally, the contributions of the laser station in the calibration site were summarized, and the benefits of simultaneously operating laser station and GNSS buoy configuration was emphasized. The construction and performance assessment of China's forthcoming satellite altimeter calibration site would benefit from the study in this paper.