北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2011, Vol. 34 ›› Issue (s1): 31-35.doi: 10.13190/jbupt.2011s1.31.sunhy

• 论文 • 上一篇    下一篇

定标噪声源逆向辐射对微波辐射计的精度影响分析

孙鸿雁,王文博,赵凯,陆阳,关止   

  1. 1 北京邮电大学 信息与通信工程学院, 北京 100876; 2 中国科学院 东北地理与农业生态研究所, 长春 130000
  • 出版日期:2011-10-28 发布日期:2011-10-28
  • 作者简介:孙鸿雁(1979-),女,博士,E-mail:shy@mail.iee.ac.cn 王文博(1964-),男,教授,博士生导师
  • 基金资助:

    国家自然科学基金项目(61001117)

Analysis of Calibration Source Inverse Radiation Influence on  Microwave Radiometer Accuracy

    

  1.  
  • Online:2011-10-28 Published:2011-10-28
  • Supported by:
     

摘要:

为了提高微波辐射计系统的精度,对微波辐射计接收机反射系数因定标噪声源影响产生的变化进行了研究,并给出了相关的误差公式和系统噪声公式.通过对3165 GHz微波辐射计进行定标噪声源逆向辐射测量实验分析表明,定标噪声源逆向辐射引起的反射系数变化,会使失配因子改变且使系统噪声增加.

关键词: 微波辐射计, 定标噪声源, 反射系数, 逆向辐射, 失配因子

Abstract:

For influenced by calibration source, the reflection coefficient of microwave radiometer receiver is studied to improve the accuracy of the microwave radiometer. The error calculation formula and system noise formula are also provided. Utilizing 3165 GHz microwave radiometer to certify the inverse radiation of calibration source, it is shown that the reflection coefficient is influenced by inverse radiation. Therefore, the missmatch factor and the system noise increasing are influenced by reflection coefficient.

Key words: microwave radiometer, calibration source, reflection coefficient, inverse radiation, missmatch factor

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