微波辐射计检测的温度补偿技术

doi:10.13190/jbupt.200802.5.sunhy

北京邮电大学学报 ›› 2008, Vol. 31 ›› Issue (2): 5-9.doi: 10.13190/jbupt.200802.5.sunhy

微波辐射计检测的温度补偿技术

孙鸿雁1,2，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

收稿日期:2007-12-22 修回日期:1900-01-01 出版日期:2008-04-28 发布日期:2008-04-28
通讯作者: 孙鸿雁

Study on Temperature Compensative Technique in Microwave Radiometer Detection System

SUN Hong-yan1,2 ， ZHAO Kai1

1. Northeast Institute of Geography and Agroecology, Chinese Academy of Science, Changchun 130012, China;
2. Graduate University , Chinese Academy of Science, Beijing 100049,China

Received:2007-12-22 Revised:1900-01-01 Online:2008-04-28 Published:2008-04-28
Contact: SUN Hong-yan

摘要/Abstract

摘要：

针对微波辐射计检波系统在环境温度变化下产生的非线性测量误差，提出了使用切比雪夫拟合算法对检波系统进行补偿。从辐射计检波系统未经补偿与切比雪夫多项式拟合算法进行温度补偿后,在工作动态范围内的输出电压曲线可见，该方法不但减少了检波系统受环境温度影响所产生的误差，而且消除了硬件补偿过程中的系统噪声，进一步提高了微波辐射计的准确性和线性度，满足了微波辐射计对地、空实时性探测需求。

关键词: 微波辐射计, 平方率检波系统, 非线性系数, 温度补偿, Chebyshev拟合算法

Abstract:

Aiming at nonlinearity measurement error of detection system caused by the change of the environment temperature, a new Chebyshev fitting algorithm is proposed for detection system temperature compensation. The temperature compensative technique can be validated by the post-correction output voltage curve and the correction output voltage curve showed in the same figure. The curves are gained when Square-law detector system works on the dynamic range. Utilizing soft data processing to implement the Chebyshev algorithm, not only the measurement error is decreased, but the system noise caused by the additional electron device is also eliminated. Using compensative technique in the microwave radiometer, the accuracy and linearity of such system is optimized, and the instrument is more reliable for the real-time observation on airborne or ground platform.

Key words: microwave radiometer, Square-law detector system, nonlinearity coefficient, temperature compensation, Chebyshev fitting algorithm

中图分类号:

TP732.1

孙鸿雁，赵凯. 微波辐射计检测的温度补偿技术[J]. 北京邮电大学学报, 2008, 31(2): 5-9.

SUN Hong-yan1,2 ， ZHAO Kai1. Study on Temperature Compensative Technique in Microwave Radiometer Detection System[J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2008, 31(2): 5-9.

参考文献

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微波辐射计检测的温度补偿技术

Study on Temperature Compensative Technique in Microwave Radiometer Detection System

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