高分三号SAR卫星系统级几何定位精度初探

丁赤飚; 刘佳音; 雷斌; 仇晓兰

doi:10.12000/JR17024

高分三号SAR卫星系统级几何定位精度初探

DOI: 10.12000/JR17024

丁赤飚^②, ,,
刘佳音^①,②,,
雷斌^①,②,,
仇晓兰^①,②,

①.
中国科学院空间信息处理与应用系统技术重点实验室北京 100190
②.
中国科学院电子学研究所北京 100190

基金项目: 国家高分重大专项共性关键技术(30-Y20A12-9004-15/16, 03-Y20A11-9001-15/16)

详细信息

作者简介:
丁赤飚(1969–)，男，研究员，博士生导师，现任中国科学院电子学研究所副所长，主要从事合成孔径雷达、遥感信息处理和应用系统等领域的研究工作，先后主持多项国家863重点项目和国家级遥感卫星地面系统工程建设项目，曾获国家科技进步一等奖、二等奖各一项。E-mail: cbding@mail.ie.ac.cn

刘佳音(1977–)，女，博士，现任职于中国科学院电子学研究所，副研究员，研究方向为遥感图像定位及地理编码等。E-mail: liujy@mail.ie.ac.cn

雷斌：雷斌(1978–)，男，研究员，博士生导师，任职于中国科学院电子学研究所，主要研究方向为合成孔径雷达及多源遥感信息处理与应用系统等。E-mail: leibin@mail.ie.ac.cn

仇晓兰(1982–)，女，中国科学院电子学研究所副研究员，主要研究领域为单/E-mail: xlqiu@mail.ie.ac.cn

通讯作者:
丁赤飚 cbding@mail.ie.ac.cn

中图分类号: TP75
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出版历程
- 收稿日期: 2017-03-13
- 修回日期: 2017-03-17
- 网络出版日期: 2017-02-28

Preliminary Exploration of Systematic Geolocation Accuracy of GF-3 SAR Satellite System

Ding Chibiao^{②
, ,},
Liu Jiayin^{①,②
,},
Lei Bin^{①,②
,},
Qiu Xiaolan^{①,②
,}

①.
Key Laboratory of Technology on Geo-spatial Information Processing and Application System,Chinese Academy of Sciences,Beijing 100190,China
②.
Institute of Electronics,Chinese Academy of Sciences,Beijing 100190,China

Funds: The Key Standard Technologies of National High Resolution Special (30-Y20A12-9004-15/16, 03-Y20A11-9001-15/16)

摘要

摘要: 高分三号SAR卫星是我国首颗空间分辨率达到1 m的C波段多极化合成孔径雷达成像卫星，于2016年8月成功发射，并通过5个月的在轨测试任务，于2017年1月正式交付用户单位使用。该文利用高分三号卫星实际在轨监测数据，分析了从数据采集、大气传输到成像处理与几何定位的全链路系统级几何定位误差源，并进行了基于角反射器的几何定位精度验证实验。实验结果表明，高分三号SAR卫星系统几何定位精度可以达到3 m。
- 高分三号卫星 /
- 斜距多普勒模型 /
- 系统级几何定位 /
- 误差源分析
Abstract: GF-3, the first full-polarimetric Synthetic Aperture Radar (SAR) satellite of China with a resolution up to 1 m, was successfully launched in August 2016 and, after 5 months of in-orbit calibration, it was officially delivered to the users in January 2017. In this paper, the geometric positioning error sources of the entire system are analyzed based on the real data acquisition, including atmospheric transmission, image processing, and geometric positioning. The positioning precision of the SAR system is validated by corner reflectors. The results show that the satellite positioning accuracy improved by 3 m.
- GF-3 satellite /
- Range-Doppler model /
- Systematic geolocation /
- Error source analysis

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图 1 星载SAR斜距多普勒定位模型

Figure 1. The range-Doppler model of spaceborne SAR

下载: 全尺寸图片幻灯片

图 2 精密轨道每天6 h重叠位置差异图

Figure 2. The overlap position difference map of six hours per day of precise orbit

下载: 全尺寸图片幻灯片

图 3 精密轨道每天6 h重叠速度差异图

Figure 3. The overlap velocity difference map of six hours per day of precise orbit

下载: 全尺寸图片幻灯片

图 4 20 MHz带宽&45 μs脉宽下内定标的系统时延标定值

Figure 4. The system time delay value of internal calibration with 20 MHz bandwidth and 45 μs pulse width

下载: 全尺寸图片幻灯片

图 5 角反射器及天宝R5

Figure 5. The corner reflector and Timbel R5

下载: 全尺寸图片幻灯片

图 6 角反射器的位置示意图

Figure 6. The place of corner reflectors

下载: 全尺寸图片幻灯片

图 7 高分三号卫星聚束模式下图像

Figure 7. The images of sliding spotlight mode of GF-3 satellite

下载: 全尺寸图片幻灯片

表 1 角反射器的定位精度

Table 1. The positioning accuracy of the corner reflectors

入射角	指北误差(m)	指东误差(m)	定位精度(m)
32.27	1.09	0.50	1.19
48.43	1.87	2.79	3.35
29.17	1.00	1.57	1.86
30.57	1.80	2.63	3.18
RMS			2.56

下载: 导出CSV

参考文献(13)

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