Experimental Analysis of the Hongqi-1 H9 Satellite Imagery for Geometric Positioning

Launched on January 15, 2020, the Hongqi-1-H9 wide-range satellite, with a resolution of better than 1 meter and a swath width of 136 km, is the largest sub-meter level satellite in the world and the first ton-level commercial remote sensing satellite in China, which can acquire sub-meter image data of about 1,000km
²
per second and realize the acquisition of full-coverage image information of more than 1000,000 km
²
. Based on the characteristics of the Hongqi-1-H9 satellite, this paper gives an experimental analysis and the experimental results reveal the high geometric positioning performance. In the study area, the Hongqi-1-H9 exhibits a good geometric positioning performance, with the positioning accuracy of 3.2448m in latitude direction, 1.6639m in longitude direction and 1.7466m in elevation direction when using 5 GPS points. Therefore, the Hongqi-1-H9 satellite can achieve high-precision positioning performance for the experimental area, and will be more widely used in many fields.