微波辐射计接收机的定标方法

微波辐射计接收机的定标方法

栾卉¹,², 张洪武³, 赵凯¹

1. 中国科学院东北地理与农业生态研究所, 长春 130012; 2. 中国科学院研究生院, 北京 100049; 3. 吉林大学物理学院, 长春 130021

收稿日期:2006-10-20 修回日期:1900-01-01 出版日期:2007-05-26 发布日期:2007-05-26
通讯作者: 栾卉

Research of Microwave Radiometer Receiver Calibration

LUAN Hui¹,², ZHANG Hong wu³, ZHAO Kai¹

1. Northeast Institute of Geography and Agriculture Ecology, CAS, Changchun 130012, China; 2. Graduate School of the Chinese Academy of Sciences, Beijing 100049, China; 3. College of Physics, Jilin University, Changchun 130021, China

Received:2006-10-20 Revised:1900-01-01 Online:2007-05-26 Published:2007-05-26
Contact: LUAN Hui

摘要/Abstract

摘要： 结合23.8 GHz数字增益波动自动补偿微波辐射计, 介绍使用低温标准噪声源和精密可变衰减器的接收机定标方法, 并分析辐射计定标方程的求解方法. 应用实例对3种定标方程解法进行比较, 结果表明, 两点定标法与回归直线法求得定标方程的标准差基本相同, 因此当辐射计接收机线性度很好时, 在辐射计动态范围内, 可以应用两点定标法求得接收机的定标方程. 

关键词: 微波辐射计, 接收机, 定标, 两点定标法

Abstract: Taken 23.8 GHz digital auto gain compensative microwave radiometer for example, the receiver calibration technique using low temperature reference noise source and variable precise attenuator is presented and the solutions for calibration equation are analyzed. Via comparison of these three calibration methods, it was found that the equation educed from two-point calibration technique is as well as the regression line method’s results. The conclusion is thus conducted that calibration equation could be achieved using two-point calibration technique with the excellent receiver linearity in dynamic temperature ranges of radiometer receiver.

Key words: microwave radiometer, receiver, calibration, two-point calibration technique

中图分类号:

TN911

栾卉,, 张洪武, 赵凯. 微波辐射计接收机的定标方法[J]. J4, 2007, 45(03): 458-462.

LUAN Hui,, ZHANG Hong wu, ZHAO Kai. Research of Microwave Radiometer Receiver Calibration[J]. J4, 2007, 45(03): 458-462.

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