地基微波辐射计Tipping定标效果及误差分析  

Tipping Calibration Effect and Error Analysis of Ground-Based Microwave Radiometers

作　　者：雷连发[1] 马若飞[1] 洪伟[1] 陈婷[1] LEI Lianfa;MA Ruofei;HONG Wei;CHEN Ting(Xi'an Electronic Engineering Research Institute,Xi'an 710100)

机构地区：[1]西安电子工程研究所,西安710100

出　　处：《火控雷达技术》2023年第4期29-36,共8页Fire Control Radar Technology

摘　　要：地基多通道微波辐射计采用了Tipping定标方法来实现自动定标,它是维持微波辐射计观测亮温数据可靠性的重要措施之一。为了说明Tipping自动定标过程,从Tipping标定的原理出发,详细介绍了微波辐射计Tipping自动定标过程及使用条件,同时对定标误差的基本来源进行了定量分析。最后利用微波辐射计实际观测资料进行了Tipping定标试验,并利用探空资料对Tipping定标效果进行了对比验证。结果表明Tipping定标方法使得亮温定标精度小于1 K,能够有效提高亮温观测精度和湿度廓线的反演效果。该方法对微波辐射计亮温数据观测的长期稳定性有着显著的作用。For ground-based multi-channel microwave radiometers,the tipping calibration method is used for automatic calibration.It is one of the most important measures to maintain the reliability of the brightness temperature measurements.In order to illustrate the automatic tipping calibration process,this paper describes the tipping calibration principle,the calibration procedures,and the conditions necessary for implementing the calibration.In addition,the main sources of calibration errors are quantitatively analyzed.Finally,a tipping calibration test is carried out by using the measured data of microwave radiometers,and the calibration result is analyzed using actual air sounding data.The results show that the accuracy of the tipping calibration is better than 1.0 K for the brightness temperature.The tipping calibration method can improve the brightness temperature measurement accuracy and the retrieval effect of the water vapor density profiles.In addition,it has a significant active effect on the long-term stability of the brightness temperature measurement.

关 键 词：微波辐射计 Tipping标定 亮温 

分 类 号：TN95[电子电信—信号与信息处理]