天绘一号立体测绘卫星概观

Overview of the Stereo Surveying and Mapping Satellite TH- 1

天绘一号（TH-1）卫星是我国首颗传输型立体测绘卫星。在概述该卫星光学成像传感器、数据产品之后，本文重点介绍了实现无地面控制点摄影测量的关键技术——相机几何参数在轨标定技术和相机三线阵影像光束法平差技术与相关试验。结果表明，天绘一号卫星可实现全球无地面控制点条件下1：5万比例尺地形图的测制，具有广阔的应用前景。

TH - 1 is the first transmission - type stereo surveying and mapping satellite of our country. This paper briefly introduces the optical sensors and data products related to the satellite, and makes a detailed introduction of the key technologies of photogrammetry without ground control points, namely the camera geometric parameters on - orbit calibration technology and the three - line array image bundle adjustment technology. Experiments are carried out and the results show that the TH - 1 can accomplish the surveying and mapping mission of 1：50,000 topographic map without ground control points on a global scale, and provide diverse products that are widely used in various fields.