| 资源三号02星对地激光测高系统几何检校及验证 |
| |
| 引用本文： | 张过,李少宁,黄文超,李德仁. 资源三号02星对地激光测高系统几何检校及验证[J]. 武汉大学学报(信息科学版), 2017, 42(11): 1589-1596. DOI: 10.13203/j.whugis20160514 |
| |
| 作者姓名： | 张过 李少宁 黄文超 李德仁 |
| |
| 作者单位： | 武汉大学测绘遥感信息工程国家重点实验室, 湖北 武汉, 430079 |
| |
| 基金项目： | 国家重点研发计划2016YFB0500801国家自然科学基金91538106国家自然科学基金41501503国家自然科学基金41501383国家自然科学基金41601490湖北省自然科学基金2015CFB330测绘遥感信息工程国家重点实验室开放基金15E02地理信息工程国家重点实验室开放基金SKLGIE2015-Z-3-1中央高校基本科研业务费专项资金2042016kf0163 |
| |
| 摘 要： | 星载激光测高仪安装误差、激光指向和激光测距误差等导致最终激光测高精度不高，对激光器进行在轨几何检校可以有效提升激光测高精度。针对资源三号02星（ZY3-02）激光测高仪的工作模式，以裸露地表的航天飞机雷达地形测绘任务（shuttle radar topography mission，SRTM）数字高程模型（digital elevation model，DEM）数据约束同轨激光测距值，通过逼近地形起伏趋势线实现了卫星激光器出射方向的初始检校，实验证明不同轨激光指向的相对检校精度在20 m以内。利用地面铺设激光靶标的方法对星载激光测高系统进行几何精检校，并通过外业测量验证了ZY3-02激光器在平坦区域的测高精度优于0.5 m。
|
| 关 键 词： | 激光测高 资源三号02星 无波形 几何检校 地形匹配 |
| 收稿时间： | 2016-11-18 |
Geometric Calibration and Validation of ZY3-02 Satellite Laser Altimeter System |
| |
| Affiliation: | State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China |
| |
| Abstract: | The location accuracy of space-borne laser altimeters suffers from installation errors. Calibration could improve the positioning and height accuracy effectively based on the operation data of satellite in orbit. A novel calibration method is put forward for ZiYuan-3 (02) satellite (ZY3-02) laser altimeter that without waveform. In this approach, the error in the laser distance and positioning calibration is indicated by the terrain matching method. A test area with an exposed surface constrains the orbit laser ranging using SRTM-DEM data, and the initial calibration of the direction of the starter is obtained by approximating the terrain fluctuation trend line. The test results were verified; the relative pointing precision of different orbits data was 20 meters. A series of laser reflectors operated on the ground determine the surface radiometric intensity of the laser footprint. The calibration parameters compensate the laser positioning model; the height accuracy of the ZY3-02 satellite laser altimeter was 0.5 meter on a flat surface. |
| |
| Keywords: | |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《武汉大学学报(信息科学版)》浏览原始摘要信息 |
|
点击此处可从《武汉大学学报(信息科学版)》下载免费的PDF全文 |
