摘要
静止轨道微波辐射计可实现全天时、全天候、高频次云雨大气观测,在台风、流域性强降水探测和预报方面发挥重要作用。但在波束扫描、多频复用、系统定标等方面的运用存在较大困难,世界上尚无在轨应用先例。现从探测需求出发,对静止轨道微波辐射计进行了系统方案设计。提出了卫星平台与辐射计部件快慢结合扫描的方法,以解决波束扫描和系统定标难题;提出了低频选入射角层叠式布局准光学频段分离方法,以解决多频段复用难题。研制了微波辐射计原理样机,通过实验室和外场试验验证了系统设计,为静止轨道微波探测卫星研制提供了一定指导。
Geostationary orbit microwave radiometer can observe cloud,rain and atmosphere at high frequency in all-time and all-weather condition.It plays an important role in typhoon,basin area precipitation and weather forecast.Because of difficulties in application of beam scanning,multi-frequency complex and system calibration,no geostationary orbit microwave observation has been realized in the world.A whole GEO radiometer system is designed and a method of satellite platform slow scanning and radiometer fast scanning is put forward to solve the scanning and calibration problems simultaneously.A two-layer type and low frequency selective surface incident angle design is put forward to solve the multi-frequency feed problem.A prototype is manufactured and the system design is verified through laboratory and imaging test.The research is helpful for geostationary orbit microwave observation satellite development.
作者
谢振超
李秀伟
姚崇斌
姜丽菲
李向芹
XIE Zhenchao;LI Xiuwei;YAO Chongbin;JIANG Lifei;LI Xiangqin(Shanghai Aerospace Electronic Technology Institute,Shanghai 201109,China;Shanghai Academy of Spaceflight Technology,Shanghai 201109,China)
出处
《上海航天》
CSCD
2018年第2期20-28,共9页
Aerospace Shanghai
关键词
静止轨道
微波辐射计
波束扫描
准光学馈电
多频复用
系统定标
成像试验
灵敏度测试
geostationary orbit
microwave radiometer
beam scanning
quasi-optical feed
multi-frequency complex
system calibration
imaging test
sensitivity test
