V波段谱仪的大气温度探测性能及试飞数据分析  

Atmospheric Temperature Detection Performance and Airborne Test Data Analysis of V-band Spectrometer

作　　者：何文明 刘璟仪 陆浩 王文煜 王特 丁甲 张洲 王振占 HE Wenming;LIU Jingyi;LU Hao;WANG Wenyu;WANG Te;DING Jia;ZHANG Zhou;WANG Zhenzhan(Key Laboratory of Microwave Remote Sensing Technology,National Space Science Center,Chinese Academy of Sciences,Beijing 100190,China;School of Electronic,Electrical and Communication Engineering,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院国家空间科学中心微波遥感技术重点实验室,北京100190 [2]中国科学院大学电子电气与通信工程学院,北京100049

出　　处：《遥感技术与应用》2024年第4期832-840,共9页Remote Sensing Technology and Application

基　　金：低轨气象综合测量卫星系统有效载荷技术论证(科工一司【2021】1176)。

摘　　要：为了初步验证微波谱仪的温度探测性能,中国科学院国家空间科学中心成功研制了大气微波综合探测仪(Atmospheric Microwave Comprehensive Sounder,AMCS),并开展了国内首次机载试验。采用常温黑体热定标源和高温噪声定标源对5组飞行数据实时定标,并采用大气辐射传输仿真模型(ARTS)中的最优估计法进行反演分析。结果表明:同一时刻定标后的亮温数据具有较好的一致性,与模拟亮温的变化趋势基本一致。2022年9月17日3个时刻的反演数据受云和雨雪天气的影响,反演的均方根误差(RMSE)保持在1.5 K以内。2022年9月21日两个时刻反演的RMSE基本保持在1 K以内,明显优于传统的通道式微波辐射计。本次机载试验初步验证了400~520 hPa内AMCS的V波段谱仪的温度廓线探测性能,为后续星载微波谱仪的设计和应用奠定基础。To verify the performance of the microwave spectrometer for temperature detection and better design and apply the microwave spectrometer on the new generation of Fengyun satellite,the National Space Science Center of the Chinese Academy of Sciences successfully developed the Atmospheric Microwave Comprehensive Sounder(AMCS)and carried out the first airborne test in China.The test was conducted on September 17 and 21,2022 in the Sanjiangyuan area.The altitude of the observation area remains basically above 4 km,and the cruising altitude of the drone is 7~7.5 kilometers.A normal-temperature blackbody thermal calibration source and a high-temperature noise calibration source are used to calibrate the flight data at five moments on Septem⁃ber 17 and 21,2022,and the optimal estimation method in the Atmospheric Radiation Transmission Simulator(ARTS)is used for retrieval analysis.The results show that the brightness temperature data after calibration at the same time have good consistency,which are basically consistent with the simulated brightness temperature.The retrieval data of the three moments on September 17,2022 are affected by clouds,rain and snow,and the Root Mean Square Error(RMSE)remain within 1.5 K,while the retrieval results of the traditional channel mi⁃crowave radiometer at different times are quite different.The RMSEs at the two moments on September 21,2022 are basically maintained within 1 K,and the RMSE at most heights was kept within 0.7 K,which are sig⁃nificantly better than the traditional channel radiometer.This airborne test preliminarily verifies the performance of the AMCS within 400~520 hPa and lays a foundation for the subsequent design and application of space⁃borne microwave spectrometers.More detailed V-band spectrometer test analysis of the higher atmosphere will be carried out.

关 键 词：V波段谱仪 大气微波综合探测仪 机载试验 温度廓线 反演 

分 类 号：P407[天文地球—大气科学及气象学]