地球静止轨道卫星精密扩频测距方法  

Precision Spread Spectrum Ranging Method for GEO Satellite

作　　者：刘宁[1] 刘浩杰 LIU Ning;LIU Haojie(Institute of Remote Sensing Satellite,China Academy of Space Technology,Beijing 100094,China;Institute of Spacecraft Application System Engineering,China Academy of Space Technology,Beijing 100094,China)

机构地区：[1]中国空间技术研究院遥感卫星总体部,北京100094 [2]中国空间技术研究院卫星应用总体部,北京100094

出　　处：《航天器工程》2023年第4期37-41,共5页Spacecraft Engineering

摘　　要：地球静止轨道卫星使用全球导航卫星系统进行定位存在可见卫星数少、接收信号弱等困难,而扩频测距技术具有测距精度高、无模糊距离大和抗干扰性能强等优异特性,是当今复杂电磁环境下精密测距的首选。随着卫星对图像处理的定位精度要求不断提高,针对常规扩频测距系统的测距精度无法满足卫星定轨需求的问题,文章提出了一种精密扩频测距方法,基于在轨自校正算法,消除扩频测距终端距离零值受温度等因素的影响,实现高精度地基测距。在轨实测数据表明:精密扩频测距方法可以将星上部分测距精度提升1个数量级,为星地大系统精密定轨创造优良条件。There are some difficulties in using GNSS for positioning GEO(geostationary earth orbit)satellites,such as a small number of visible navigation satellites and weak received signals.However,the spread spectrum ranging technology has excellent characteristics such as high ranging precision,large distance without ambiguity and strong anti-interference performance,making it the first choice for high-precision ranging in today’s complex electromagnetic environment.With the continuous improvement of satellite positioning accuracy requirements for image processing,the ranging accuracy of conventional spread spectrum ranging system can not meet the requirements.In this paper,a high-precision spread spectrum ranging method is proposed.Based on in-orbit self-calibration algorithm,the method eliminates the influence of temperature and other factors on the zero range of the transponder,and thus achieving high-precision ground based ranging.The actual measurement data of in-orbit satellite shows that,the ranging accuracy of the on-board part can be improved by one orders of magnitude,creating excellent condition for precise orbit determination of satellite-to-ground system.

关 键 词：地球静止轨道卫星 高精度伪码测距 自动校正 

分 类 号：TN98[电子电信—信息与通信工程]