摘要
高分七号卫星搭载了我国首台全波形体制激光测高仪,它具有测距精度高、指向稳定和长寿命的特点,在少量或无地面控制点情况下,以激光足印为高程控制点,与测绘相机数据联合平差,可实现1∶10000比例尺地图对平面误差和高程精度的要求。文章论述了高分七号卫星激光测高仪的总体设计思路,并给出了高速采样全波形测距、基于足印相机的激光指向测量、长寿命固态激光器的设计方案和地面验证结果。激光测高仪发射入轨以后,对激光测距精度、激光指向测量精度、激光出光次数和能量遥测进行了统计和分析,结果表明:激光测高仪状态良好,测距精度优于0.3 m,满足设计指标要求。
To meet the requirement of 1∶10000-scale mapping over China,the GF-7 satellite is equipped with China's first full-waveform laser altimeter,which is designed with high ranging accuracy,strong pointing stability and long lifetime.After adjusted with image data from the mapping camera,footprints of the laser altimeter can be used as control points and can be applied in regions without or with only few ground control points.The overall design is summarized in this paper,especially the scheme of full-waveform ranging,laser pointing measurement and laser emitter.To validate the performance of the laser altimeter,ground and on-orbit tests are implemented.The results show that the laser altimeter's ranging accuracy is finer than 0.3m,which is consistent with pre-launch design and analysis.
作者
国爱燕
戴君
赵晨光
张新伟
GUO Aiyan;DAI Jun;ZHAO Chenguang;ZHANG Xinwei(Beijing Institute of Spacecraft System Engineering,Beijing 100094,China)
出处
《航天器工程》
CSCD
北大核心
2020年第3期43-48,共6页
Spacecraft Engineering
基金
国家重大科技专项工程。
关键词
高分七号卫星
激光测高仪
全波形测距
在轨验证
测距精度
GF-7 satellite
laser altimeter
full-waveform ranging
on-orbit validation
ranging accuracy
