一种星间链路天线时延零值测试方法  

A Delay Measure Technique of Crosslink Antenna

作　　者：崔小准[1] 毕少筠 钟兆丰[1] 王庆华[1] 朱剑涛[1] 

机构地区：[1]中国空间技术研究院总体部,北京100094

出　　处：《测绘科学技术学报》2013年第6期555-558,共4页Journal of Geomatics Science and Technology

基　　金：国家科技重大专项资助项目(DHZX01A02004)

摘　　要：星间链路收发天线的时延零值是星间测距时延的组成部分,其标定精度影响星间的测距精度,从而影响编队飞行的星座系统性能。提出的星间链路天线时延标定方法,利用星座系统配置多个星间链路天线特点,取待测天线两两组合,通过星间链路发射机和星间链路接收机组成测试系统,测量组合时延。根据各组合时延值、测试通道的零值校准结果以及收发天线的空间传播时延,通过数据处理得到各测试天线收发星间链路信号时的绝对时延。提出的测试方法不需要专门的校准天线,采用与星间链路传输信号体制一致的测试信号,测试结果能真实反映星间链路信号传输时延。试验系统的测试结果表明,采用提出方法的天线时延标定精度可以优于0.5 ns。The delay of crosslink antenna is part of the inter-satellite ranging delay. The measurement accuracy of delay for erosslink antenna affect the inter-satellite ranging accuracy, thus affecting the performance of formation flying constellation system. The proposed technique took the advantage of the characteristic that multiple crosslink antennas have been used in constellation system. The testing erosslink antennas were taken to form into groups and each group consisted of two erosslink antennas. The combinational delay of transceiver could be gotten. With the absolute delay of test equipment and free spaee between the testing antennas, the absolute delay of crosslink anten- na could be obtained after data processing. Measurement results truly reflected the erosslink antenna delay as the test signal in accordance with the actual erosslink signal. The proposed method was simple and did not require a special calibration antenna. Test results of the experimental system have shown that the measurement accuracy of antenna delay with the proposed method could achieve 0.5 ns.

关 键 词：卫星 星间链路 天线 时延 测试 发射机 接收机 

分 类 号：P228[天文地球—大地测量学与测量工程] TS951[天文地球—测绘科学与技术]