地面站系统G/T值测试方法综述

An Overview of G/T Value Test Methods for Earth Station System

G/T值是地面站系统的重要性能指标之一,选择一个合适的测试方法对于精确测量和正确表征系统特性非常重要。简述了地面站系统G/T值的基本概念,系统总结了地面站系统G/T值测试方法,这些方法包括间接法、载噪比法、射电天文法和比较法。论述了各种测试方法的基本原理、特点及其应用的局限性,并对其测量误差进行了简单论述。最后,对各种测量方法进行了综合比较,为地面站系统工程师选择合适的G/T值测试方法提供参考。

G/T value is one important parameter for earth station system.It is very important to select a good test method for accurate measurement and correct system characteristics.In this paper,basic concept of the earth station system G/T value is described simply;test methods for earth station system G/T value are summarized systemically.And these methods include indirect method,ratio of carrier to noise method,radio astronomy method and comparative method.The basic principles,features and limitations of different test methods are discussed,and their measuring errors are also discussed.Finally,various methods of measurement are comprehensively compared,which provides reference for engineers to select the appropriate method of G/T value measurement.