G/T值自动化测试

G/T值是卫星地面接收系统的一项重要指标,常规测试方法耗时、费力、计算量大。通过工程实践详细论述利用射电星法测量地面大型天线系统的G/T值的原理及计算方法,论证G/T值自动化测试的可行性,并对测试过程中引入的测量误差进行了分析,给出G/T值自动化测试的实现方法及测试结果。该方法具有自动化程度高、测试指标精度高、测试速度快等特点,可广泛应用于各种卫星地面接收、航天测控等设备。

Automatic Test of G/T Ratio

G/T ratio is an important index of the satellite ground receiving system.Traditional test approaches are time-consuming,laborious and need great amount of calculation.Taking a practical engineering project as an example,a radio star approach is introduced for the test of system G/T ratio in the paper.The principle and calculation method of G/T ratio measurement for large ground antenna system with radio star approach is discussed in detail,the feasibility of automatic test of G/T ratio is demonstrated,and the test error is analyzed.The realization approach and actual test results of automatic test of G/T ratio are presented.This approach features high degree of automation,high accuracy and high speed.It can be widely used for all kinds of satellite ground receiving systems and space TT&C equipment.