吉林一号光谱卫星对月观测图像定位方法

doi:10.11947/j.AGCS.2024.20220597

测绘学报 ›› 2024, Vol. 53 ›› Issue (3): 503-511.doi: 10.11947/j.AGCS.2024.20220597

吉林一号光谱卫星对月观测图像定位方法

景振华¹, 胡秀清^2,3, 李爽¹

1. 南京航空航天大学航天学院, 江苏南京 211106;
2. 中国气象局中国遥感卫星辐射测量和定标重点开放实验室, 国家卫星气象中心(国家空间天气监测预警中心), 北京 100081;
3. 许健民气象卫星创新中心, 北京 100081

收稿日期:2022-10-19 修回日期:2023-12-09 发布日期:2024-04-08
通讯作者: 胡秀清 E-mail:huxq@cma.gov.cn
作者简介:景振华(1992—),男,博士生,研究方向为卫星仪器辐射定标和遥感图像几何处理。E-mail:jingzhh@nuaa.edu.cn
基金资助:
国家重点研发计划(2022YFB3902900;2022YFB3902901);南京航空航天大学博士学位论文创新与创优基金(BCXJ22-12)

The positioning method of lunar observations by Jilin-1 Guangpu satellite

JING Zhenhua¹, HU Xiuqing^2,3, LI Shuang¹

1. College of Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China;
2. Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites, National Satellite Meteorological Center (National Space Weather Monitoring and Early Warning Center), China Meteorological Administration, Beijing 100081, China;
3. Innovation Center for FengYun Meteorological Satellite (FYSIC), Beijing 100081, China

Received:2022-10-19 Revised:2023-12-09 Published:2024-04-08
Supported by:
The National Key Research and Development Program of China (Nos. 2022YFB3902900; 2022YFB3902901); The Funding for Outstanding Doctoral Dissertation in NUAA (No. BCXJ22-12)

摘要/Abstract

摘要： 明确遥感图像中像元位置是数据应用的基本前提,结合地球轨道卫星获得的高分辨率月球视图,有望通过月表特定区域的辐亮度直接标定卫星仪器。本文针对吉林一号光谱02星(JL1GP02)对月观测图像提出了一种不严格依赖仪器参数的月球图像坐标计算方法,通过观测时刻的卫星视角天平动,以及月球和仪器扫描的方位关系,计算了二维图像像元的月面坐标,并通过创建模拟图像评估了几何定位质量。结果表明,不同分辨率月球观测图像的几何偏差通常在1.3个像元之内,约两年的时序结果非常一致且总体服从正态分布也表明定位结果的可靠性。本文方法可以避免复杂的坐标转换,并可在仪器内方位参数未知的情况下实现月球图像像元级几何定位。

关键词: 几何定位, 月球图像, 坐标转换, 吉林一号卫星, 月球定标

Abstract: 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 instruments 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 observations. The selenographic coordinates of the two-dimensional image pixels are calculated by the satellite view libration at the observation moment and the orientation relationship between the Moon and instrument scans, and the geometric positioning quality is evaluated by creating simulated images. Results show that the geometric deviations of the lunar observation images at different 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 transformation and achieve image-level geometric positioning of lunar images when the interior orientation parameters are unknown.

Key words: geometric positioning, lunar image, coordinate transformation, Jilin-1 satellite, lunar calibration

中图分类号:

P237

景振华, 胡秀清, 李爽. 吉林一号光谱卫星对月观测图像定位方法[J]. 测绘学报, 2024, 53(3): 503-511.

JING Zhenhua, HU Xiuqing, LI Shuang. The positioning method of lunar observations by Jilin-1 Guangpu satellite[J]. Acta Geodaetica et Cartographica Sinica, 2024, 53(3): 503-511.

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吉林一号光谱卫星对月观测图像定位方法

The positioning method of lunar observations by Jilin-1 Guangpu satellite

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