The positioning method of lunar observations by Jilin-1 Guangpu satellite
The clarification of pixel positions in remote sensing images is an essential prerequisite for data applications,and in combination with the high-resolution Moon views obtained by Earth-orbiting satellites,it is promising to calibrate satellite in-struments directly by the radiance of specific regions of the lunar surface.This paper proposes a method to calculate the lunar image coordinates without relyingstrictly on the instrument parameters for the Jilin-1 GuangPu02(JL1GP02)lunar observa-tions.The selenographic coordinates of the two-dimensional image pixels are calculated by the satellite view libration at the ob-servation moment and the orientation relationship between the Moon and instrument scans,and the geometric positioning quali-ty is evaluated by creating simulated images.Results show that the geometric deviations of the lunar observation images at dif-ferent resolutions are usually within 1.3 pixels,and the time series results for about two years agree well and generally follow a normal distribution,indicating the reliability of the positioning results.The method can avoid complicated coordinate trans-formation and achieve image-level geometric positioning of lunar images when the interior orientation parameters are unknown.
万方数据
维普
