无线电工程2026，Vol.56Issue(1)：92-103,12.DOI:10.3969/j.issn.1003-3106.2026.01.010
地面接收系统G/T值的射电源测量方法及误差分析
G/T Value Measurement and Error Analysis with Radio Source for Ground Receiving Station
周慧 1王前1
作者信息
- 1. 四川天奥空天信息技术有限公司,四川 成都 610036
- 折叠
摘要
Abstract
The Gain to Noise Temperature Ratio(G/T)is a critical parameter for evaluating the performance of satellite ground receiving system,and its measurement accuracy directly affects the validity of system performance assessment.To further improve the accuracy of G/T measurement,the principles and methods with radio source for G/T value measurement are elaborated.Additionally,the precise calculation models for the atmospheric absorption correction factor,extended beam width correction factor and time-varying flux correction factor of the radio source are proposed.The curves of flux density and correction factors are also provided.Based on these models,G/T value measurements are conducted on a medium-aperture antenna using the moon and Cassiopeia A as radio sources.Furthermore,the measurement errors of the G/T value are thoroughly analyzed.This analysis not only verifies the effectiveness of the proposed models,but also provides a scientific basis and practical guidance for enhancing the accuracy and reliability of G/T value measurement.关键词
增益噪声温度比/射电源/修正因子/误差分析Key words
G/T value/radio source/correction factor/error analysis分类
信息技术与安全科学引用本文复制引用
周慧,王前..地面接收系统G/T值的射电源测量方法及误差分析[J].无线电工程,2026,56(1):92-103,12.
