以太阳为射电源直接测量天线G／T

介绍以太阳为射电源，直接测量扩充后中国陆地卫星地面接收站，３个数据通道天线的Ｇ／Ｔ性能．对固定通道，测量了Ｌａｎｄｓａｔ—５下行频率的Ｇ／Ｔ～α（天线俯仰角）性能曲线；对可变通道，在α＝５°、３０°时，测量了Ｌａｎｄｓａｔ—６、ＪＥＲＳ—１、ＥＲＳ—１、ＳＰＯＴ卫星、ＺＹ—１卫星下行频率的Ｇ／Ｔ性能，以及可变通道的Ｇ／Ｔ～ｆ性能曲线，最后进行了误差分析．

DIRECTLY MEASURING ANTENNA G/T BY USING SUN AS A RADIO SOURCE

his paper introduces direct measurement of the antenna G/ T performance in three data channels by using the sun as a radio source after the Chinese Landsat Ground receiving station is upgraded.For fixed-turned data channels, antenna G/ T～α(antenna elevation angle) performance curves of the Landsat-5 down link frequency arc measured. For tuned data channels. G/ T the performance characteristics of Landsat-6. JERS-1. ERS-1. SPOT and ZY-1 Satellites down link frequencies are measured in the case of a equal to 5°and 30°.Finally the Error analysis is presented.