基于天基定量实测数据的月球长波红外辐射特性研究 -

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基于天基定量实测数据的月球长波红外辐射特性研究

doi:10.37188/CO.2021-0202

马岩¹,
张帅^1,,,
刘元¹,
马驰²

1.
北京跟踪与通信技术研究所, 北京 100094
2.
长光卫星技术有限公司, 长春 130102

基金项目:国家自然科学基金重大项目重点课题（No. 61890965）

详细信息

作者简介:
马　岩（1977—），男，山东菏泽人，硕士，北京跟踪与通信技术研究所研究员。研究方向为光电信息处理与分析、目标特性识别、数据计算技术，E-mail：Mayan888@sina.com
张　帅（1992—），男，山西吕梁人，博士，北京跟踪与通信技术研究所助理研究员。研究方向为目标特征提取与识别、光电信息处理。E-mail：zhangshuaioec@163.com

中图分类号:O432.2; TP732.2
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出版历程
- 收稿日期:2021-11-21
- 修回日期:2021-12-16
- 网络出版日期:2022-04-12
- 刊出日期:2022-05-20

Lunar long-wave infrared radiation characteristics based on space-based quantitative measured data

1.
Beijing Institute of Tracking Telecommunications Technology, Beijing 100094
2.
Chang Guang Satellite Technology Co. LTD, Changchun 130102

Funds:Supported by the Key Subject of National Natural Science Fund Major Project of China (No. 61890965)

More Information

Corresponding author:zhangshuaioec@163.com

摘要

摘要:月球是理想的在轨辐射定标源，为提高卫星等在轨航空器的长波红外辐射测量精度，本文开展了月球长波红外辐射特性研究。通过分析月球辐射来源类型、辐射探测机理和建立辐射探测模型，探寻点目标/圆盘目标模式下月球的长波红外辐射规律，并依据天基实测数据计算其定标应用精度。首先，从月球自身辐射和反射太阳辐射两方面研究月球辐射，精确拟合月表温度，建立月球红外辐射模型，仿真两部分天基卫星辐射探测结果与月相角的数学关系；其次，对卫星红外载荷进行地面辐射定标，获得图像灰度-辐照度之间转换的关键参数，进而建立了月球长波红外辐射探测模型；最后，通过“吉林一号”对月拍摄实测数据，反演计算了探测模型中月表的反射率和发射率。实验结果表明：本文所得的月表长波红外辐射特性结果准确、鲁棒性高，与Apollo 12070实验室测量结果、Diviner实测数据拟合结果相比，月球发射率和反射率的误差分别约为7.18%和5.71%。
- 月球/
- 长波红外辐射/
- 天基定量实测数据/
- 辐射特性
Abstract:The moon is an ideal on-orbit radiation calibration source. In order to improve the measurement accuracy of long-wave infrared radiation for satellites and other on-orbit aircrafts, the characteristics of lunar long-wave infrared radiation are studied in this paper. The law of lunar long-wave infrared radiation is explored taking the moon as a point target or disk target, and the calibration accuracy is calculated based on the measured space-based data by analyzing the types of lunar radiation sources and radiation detection mechanism, and by establishing a radiation detection model. First, the lunar radiation is studied from two aspects of lunar self radiation and reflected solar radiation. The lunar surface temperature is fitted accurately, the lunar infrared radiation model is established, and the mathematical relationship is simulated between the radiation measurement results of space-based satellites and the lunar phase angles. Second, the key parameters of conversion between gray-scale and irradiation images are obtained through calibrating the radiation of satellite infrared loads in the ground. The lunar long-wave infrared radiation measurement model is then established. Finally, the reflectance and emissivity of the lunar surface are calculated based on the measured data taken by the “Jilin-1” satellite on the moon. The experimental results show that the long-wave infrared radiation characteristics of the lunar surface obtained by the proposed menthod are accurate and robust. Moreover, there are nearly 7.18% and 5.71% of the fitting errors in the obtained data compared with Apollo 12070 laboratory measurement results and diviner measured data, respectively.
- moon/
- long-wave infrared radiation/
- space based quantitative measured data/
- radiation characteristics

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图 1（a）月表阳面和（b）月表阴面温度仿真结果

Figure 1.Simulation results of the temperatures on the (a) sunny and (b) shady sides of the lunar surface

下载: 全尺寸图片幻灯片

图 2相机的辐射-灰度定标结果

Figure 2.Radiometric gray-scale calibration results of camera

下载: 全尺寸图片幻灯片

图 3“吉林一号”卫星和MODIS对青海湖局部拍摄缩略图

Figure 3.Partial thumbnails of Qinghai Lake taken by “Jilin-1” satellite and MODIS

下载: 全尺寸图片幻灯片

图 4（a）“吉林一号”长波红外探测器模型及（b）其拍摄的月球图片

Figure 4.（a）Simulation model of long-wave infrared detector of “Jilin-1” satellite and（b） lunar long-wave image captured by “Jilin-1” satellite

下载: 全尺寸图片幻灯片

图 5“吉林一号”接收月球自身辐照度与月相角关系的仿真结果

Figure 5.The simulation results for the relationship between the lunar’s own irradiance received by the “Jilin-1” satellite and lunar phase angle

下载: 全尺寸图片幻灯片

图 6“吉林一号”接收月球反射太阳辐照度与月相角关系的仿真结果

Figure 6.The simulation results for the relationship between the reflected solar irradiance received by the “Jilin-1” satellite and lunar phase angle

下载: 全尺寸图片幻灯片

图 7月球等效点目标长波红外发射率和反射率

Figure 7.Long-wave infrared emissivity and reflectivity of lunar equivalent point target

下载: 全尺寸图片幻灯片

表 1“吉林一号”长波红外相机的主要参数

Table 1.Main parameters of the long-wave infrared camera of “Jilin-1” satellite

波段/μm	焦距/mm	相对孔径	分辨率	视场角/(°)	帧频/(frame·s⁻¹)	像元尺寸/μm	NETD/mK
8-12.5	60	1.17	640×512	13.3	7.49	17	≤50

下载: 导出CSV

表 2“吉林一号”对月拍摄信息参数

Table 2.Information parameters of Moon captured by the “Jilin-1” satellite

次序	观测相位角(°)	拍摄时间（北京时间）	日-月距离(km)	卫星-月距离(km)
1	5.72	2020年4月8日7:43:23	150155484.4	350339.7
2	8.27	2020年3月9日6:39:14	148890326.3	351319.3
3	9.31	2020年3月10日14:28:26	148927699.1	350427.7
4	12.38	2020年4月7日7:54:26	150106457.9	350231.5
5	18.04	2020年4月9日7:32:23	150185032.4	352748.4
6	21.36	2020年3月8日6:50:16	148834109.5	354435.4
7	22.75	2020年3月11日6:17:15	148946142.6	351837.0
8	24.35	2020年4月6日11:15:29	150048417.8	352037.6
9	31.79	2020年4月10日7:21:23	150196149.6	357210.6
10	35.91	2020年3月7日5:25:19	148754960.4	359974.6
11	38.34	2020年4月5日11:25:29	149964953.0	356162.6
12	45.33	2020年4月11日7:11:23	150191076.5	363431.2
13	52.86	2020年4月4日10:01:29	149859532.7	362171.6
14	58.38	2020年4月12日7:00:23	150172914.8	370550.0

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表 3“吉林一号”长波辐射实测反演结果

Table 3.Measured inversion results of the long-wave radiance from the “Jilin-1” satellite

次序	观测相位角/(°)	长波红外辐射照度实测反演结果/(W·s⁻²)
1	5.72	0.00493332
2	8.27	0.00492300
3	9.31	0.00487956
4	12.38	0.00470402
5	18.04	0.00449120
6	21.36	0.00441650
7	22.75	0.00438659
8	24.35	0.00418648
9	31.79	0.00387823
10	35.91	0.00371954
11	38.34	0.00350546
12	45.33	0.00317342
13	52.86	0.00273809
14	58.38	0.00493332

下载: 导出CSV

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