红外与毫米波学报2025，Vol.44Issue(6)：908-918,11.DOI:10.11972/j.issn.1001-9014.2025.06.009
基于自然地表的星载单光子激光测高数据地形轮廓匹配不确定度分析
Uncertainty analysis of terrain profile matching over natural surfaces using spaceborne photon-counting laser altimetry data
摘要
Abstract
Satellite laser altimetry technology enables the acquisition of accurate three-dimensional coordinates of ground targets,serving as a high-precision method for Earth observation.Laser altimetry data have been widely applied in areas such as terrain mapping,polar region monitoring,and forestry surveys.The terrain profile matching over natu-ral surfaces aligns the measured terrain profiles from laser altimeters with reference terrain data to determine the position-ing errors of laser altimetry measurements.This approach is currently one of the most commonly used methods for the on-orbit geometric calibration and accuracy validation of laser altimeters.However,the performance of terrain match-ing is influenced by various factors,including surface relief,along-track length of laser altimetry data,and the spacing of laser footprints.Related research is still in its early stages.This paper focuses on two key factors affecting terrain matching:the along-track length of the laser data and the spacing of laser footprints.Using the ICESat-2 satellite,which provides the highest observation density among current missions,we extracted and downsampled its measure-ment data to construct a series of laser altimetry datasets.Extensive experiments were conducted over regions in North America.Based on statistical analysis of the experimental results,this study quantifies the relationship between terrain matching uncertainty,laser data track length,and footprint spacing.关键词
星载激光测高/单光子激光测高仪/地形匹配/不确定度分析Key words
spaceborne laser altimetry/photon-counting laser altimeter/terrain matching/uncertainty analysis分类
信息技术与安全科学引用本文复制引用
周文鑫,周思寒,韩启金,栾超,王恒,赵朴凡,李松..基于自然地表的星载单光子激光测高数据地形轮廓匹配不确定度分析[J].红外与毫米波学报,2025,44(6):908-918,11.基金项目
航天系统部装备预先研究项目 （）
国家自然科学基金(42371440、41971302) Supported by the Equipment Pre-research Project of Aerospace Systems Department,the National Natural Science Foundation of China(42371440,41971302) （42371440、41971302）
