摘要
2022年10月,在西安利用地基微波辐射计进行常规大气观测实验期间,发现一个频率约为25 GHz的卫星发射信号,对微波辐射计常规观测产生了明显干扰。针对该观测事实,文章首次对微波辐射计被动遥感观测卫星发射电磁波信号的可行性进行了理论分析和针对性观测实验,结果发现该卫星发射信号主要在24.4~25.6 GHz范围内,中心频率约为25 GHz,同轨道共有3颗卫星,飞行间隔约8 h,在25 GHz附近卫星发射电磁波到达微波辐射计天线口面辐射亮温超过400 K;该组卫星轨道周期为24 h,属于倾斜同步轨道卫星。进一步利用微波辐射计观测的亮温,深入分析计算得到卫星的等效辐射功率约为66.9 dBW。本次实验观测为地基微波辐射计未来避免卫星的干扰和进一步改进设计与应用积累了经验,同时也可以看出地基微波辐射计在卫星跟踪监测中有一定的应用价值。
In October 2022,a satellite signal was found during the atmospheric observation at first time in Xi’an and its operating frequency was 25 GHz.The satellite signal had a significant interference on the observation of ground-based microwave radiometer(GMR)at 25 GHz.Based on this observation,the feasibility of microwave radiometer passive remote sensing observation satellite transmitting electromagnetic wave was analyzed and the observation experiment was carried out for the first time.We observed and studied the satellite signal characteristics by using the GMR,the TB and frequency information of satellite signal were obtained.The results showed that the satellite had a significant impact on the observation of GMR in the range of 24.4-25.6 GHz and the center frequency was 25 GHz,the TB of the satellite signal arriving at the antenna aperture of the radiometer was greater than 400 K,and the orbit period of the satellite was 24 hours,belonging to inclined synchronous orbit satellite.The orbit had three satellites,and the flight interval was eight hours.In addition,we used the satellite signal to estimate the equivalent radiant power of the satellite which was about 66.9 dBW.This experimental observation has accumulated experience for avoiding satellite interference and further design of microwave radiometer in the future.Furthermore,it can be seen that GMR has certain application value in satellite tracking and monitoring technology.
作者
秦江
雷连发
王皓
陈瑞
朱磊
QIN Jiang;LEI Lianfa;WANG Hao;CHEN Rui;ZHU Lei(North Sky-dome Information Technology(Xi’an)Co.Ltd.,Xi’an 710100,China;Xi’an Electronic Engineering Research Institute,Xi’an 710100,China;Yunnan Meteorological Disaster Prevention Technology Center,Kunming 651700,China)
出处
《遥感信息》
CSCD
北大核心
2023年第5期16-22,共7页
Remote Sensing Information
关键词
微波辐射计
亮温
卫星
倾斜同步轨道
等效辐射功率
microwave radiometer
brightness temperature
satellite
inclined synchronous orbit
equivalent radiant power
作者简介
秦江(1981-),男,硕士,高级工程师,主要研究方向为大气微波遥感技术。E-mail:qinj2001@163.com;通信作者:雷连发(1985-),男,博士,高级工程师,主要研究方向为大气微波遥感技术。E-mail:leilianfa_2006@163.com。
