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遥感技术与应用  2019, Vol. 34 Issue (6): 1205-1211    DOI: 10.11873/j.issn.1004-0323.2019.6.1205
定标专栏     
风云三号微波湿度计航空校飞辐射定标原理及数据分析
谷松岩1(),王振占2,卢乃锰1,杨忠东1,李靖2,张升伟2,杨磊1,吴雪宝1
1.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,北京 100081
2.中国科学院国家空间科学中心,北京 100190
The Principle and Data Analysis of Radiometric Calibration for Aeria-test of FY-3/MWHS
Songyan Gu1(),Zhenzhan Wang2,Naimeng Lu1,Zhongdong Yang1,Jing Li2, ZhangShengwei2,Lei Yang1,Xuebao Wu1
1.National Satellite Meteorological Center, China Meteorological Administration, Beijing 100081, China
2.National Space Science Center, Chinese Academy of Sciences, Beijing 100190, China
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摘要:

风云三号微波湿度计是我国首次在轨定量应用于大气探测的星载被动微波辐射计,为验证载荷辐射性能,发射前于2007年9月至11月开展了航空校飞试验,历时2个月共转场青海湖、敦煌和云南普洱3个试验场,地面同步实施了辐射校正测量。在阐述星载微波大气探测载荷航空校飞辐射定标原理基础上,开展航空校飞数据分析,并与同步辐射校正测量结果进行了比对验证,结果表明风云三号微波湿度计初样产品探测结果符合设计指标要求。风云三号微波湿度计航空校飞试验为其资料在轨业务定量应用奠定了基础,其中航空校飞辐射定标模型支撑了后续风云三号卫星微波湿度计在轨业务定标。

关键词: 风云三号微波湿度计航空校飞辐射定标    
Abstract:

FY-3 is Chinese second-generation sun-synchronous meteorological satellite series. The Microwave Humidity Sounder (MWHS) is a five-channel microwave radiometer in the range of 150~191 GHz onboard FY-3 satellite for atmosphere humidity sounding. To verify the load radiation performance, an aeria-test has been finished during Sep. and Nov. 2007 before launching, transferring around Qinghai, Dunhuang, and Puer. In this paper, the principle of airborne radiometric calibration for MWHS has been explained, the aeria-test calibration data has been analyzed, and the results has been compared with the synchrotron radiation correction measurement results. According the outcome, we consider the FY-3/MWHS is good enough to meet the requirements of design specifications. The aeria-test results make a firm foundation for MWHS’s operational application, and the model of airborne radiometric calibration for MWHS supported the operational preprocessing follow-up.

Key words: FY-3    Microwave humidity sounder    Aeria-test    Radiometric calibration
收稿日期: 2018-07-06 出版日期: 2020-03-23
ZTFLH:  P407.1  
基金资助: 国家重点研发计划(2018YFB0504900/2018YFB0504902);国家自然科学基金项目(41201360)
作者简介: 谷松岩(1963-),女,辽宁鞍山人,博士,研究员,主要从事微波遥感应用研究。E?mail:gusy@cma.gov.cn
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引用本文:

谷松岩,王振占,卢乃锰,杨忠东,李靖,张升伟,杨磊,吴雪宝. 风云三号微波湿度计航空校飞辐射定标原理及数据分析[J]. 遥感技术与应用, 2019, 34(6): 1205-1211.

Songyan Gu,Zhenzhan Wang,Naimeng Lu,Zhongdong Yang,Jing Li, ZhangShengwei,Lei Yang,Xuebao Wu. The Principle and Data Analysis of Radiometric Calibration for Aeria-test of FY-3/MWHS. Remote Sensing Technology and Application, 2019, 34(6): 1205-1211.

链接本文:

http://www.rsta.ac.cn/CN/10.11873/j.issn.1004-0323.2019.6.1205        http://www.rsta.ac.cn/CN/Y2019/V34/I6/1205

通道序号中心频率/GHz频率稳定度/MHz单边带宽/MHz天线主波束效率/%波束宽度/°NEΔT/K定标精度/K
1150(H)5.41 001.45896.162.00.901.3
2150(V)5.4987.08396.492.00.701.4
3183.31±12.6480.769 698.361.10.861.5
4183.31±32.61 033.654 698.361.10.910.9
5183.31±72.62 186.397 698.361/10.911.1
表1  FY-3A/MWHS性能参数在轨测试结果
图1  风云三号航空校飞平台
图2  风云三号青海湖校飞实际航线图
图3  青海湖湖面观测船迹示意
图4  普洱校飞航线和地面观测站点示意
图5  微波湿度计校飞观测时序示意
图6  风云三号微波湿度计飞越澜沧江过程中150 GHz通道亮温变化曲线黑线为150 GHz/V,灰线150 GHz/H
图7  风云三号微波湿度计校飞辐射定标流程
图8  普洱航空校飞背景正演亮温扫频图
图9  航空校飞试验中地表微波辐射扫频图
航飞观测亮温/K外场同步试验背景亮温(航飞高度8 000 m)/K对比分析地点观测-背景/K
181.3187.1青海湖水面-5.8
245.6248.4普洱雨林-2.8
252.8263.6敦煌戈壁-10.8
表2  航空校飞辐射定标结果比对

偏差/K

TBFY-3A-TBNOAA17

标准差/K均方根误差/K
150 GHz-1.3340.570 51.438 3
表3  在轨微波亮温交叉比对
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