单光子激光测高雷达测距和指向偏差的交叉点标定  

Calibrating the Ranging and Pointing Bias of Spaceborne Laser Altimeter by Dynamic Crossovers

作　　者：宋小勇[1,2] 毛悦 王龙[1,2] 宗文鹏 张奋 SONG Xiaoyong;MAO Yue;WANG Long;ZONG Wenpeng;ZHANG Fen(Xi'an Research Institute of Surveying and Mapping,Xi'an,Shaanxi 710054;State Key Laboratory of Geo-Information Engineering,Xi'an,Shaanxi 710054)

机构地区：[1]西安测绘研究所,陕西西安710054 [2]地理信息工程国家重点实验室,陕西西安710054

出　　处：《航天技术与工程学报》2024年第3期52-59,共8页

基　　金：国家自然科学基金项目(42388102)。

摘　　要：星载激光测高是获取全球地形地表信息的高效对地测量手段,也是目前精度最高的三维地形获取方法。测距和指向测量系统误差标定是星载激光测高关键技术。针对现有地面探测器或地形匹配标定方法不能精确标定系统误差时变分量,且标定场建设成本过高问题,本文分析了轨迹交叉点标定方法的可行性,构建了测距和指向系统误差模型,设计了利用轨迹交叉点标定模型参数的算法,并利用模拟仿真方法对算法的有效性进行了验证。结果表明,利用轨迹交叉点标定方法能够准确标定测距和指向系统误差时变分量,但不能标定测距误差常数分量。本文方法可为星载激光测高数据处理应用提供支撑。Spaceborne laser alimeter is a high efficient method to survey the DEM and DSM for global,and also the most accurate method to obtain the 3D digital topography.Calibration of the ranging and pointing bias is a key factor for spaceborne laser alimeters.Focus on the issue that current method with ground detection system or natural surface methods can't accurately calibrate the time-varying parameter of system bias,and the high cost of calibration field construction,the feasibility of dynamic crossovers method is analyzed.First,the model of ranging and pointing bias is constructed,then,the algorithm for calibrating the model parameter with dynamic crossovers is designed,and at last,the availability of this method is validated by simulation experiment.It is showed that the method of dynamic crossovers can obtain the accuracy time-varying parameter of ranging and pointing bias,but can't calibrate the constant factor of ranging bias.This calibration method can apply on the data processing of spaceborne laser alimeter.

关 键 词：卫星激光测高 足印位置 交叉点 系统误差 标定 

分 类 号：P228[天文地球—大地测量学与测量工程]