星载激光测高技术的快速发展急需有效的在轨几何定标方法来校正测高数据中的系统误差。探索一种基于曲线匹配的测高仪无场在轨几何定标方法。该方法利用激光足印高程曲线与DEM进行匹配获得激光足印控制点进而实现定标参数求解，无需到野外布设探测器定标场地。采用资源三号02星激光测高数据进行定标方法验证，并对定标结果进行精度评估。实验表明，经本文的定标方法校正后的测高数据的精度得到显著提升，验证了本方法的有效性。
The rapid development of spaceborne laser altimetry technology urgently requires an effective on-orbit geometric calibration method to correct the systematic errors in altimetry data. Based on curve matching, this study explores a method for on-orbit geometric calibration of the altimeter without field. The method uses the laser footprint elevation curve to match the DEM for obtaining the laser footprint control points to calculate the calibration parameter, and it is not necessary to build the detector calibration field. We use the ZY3-02 satellite altimetry data to verify the proposed calibration method and to evaluate accuracy of the calibration. Experiment results show that the accuracy of the altimetry data has been significantly improved after conection using the calibration method, which verifies the effectiveness of the method.
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