摘要
针对深远空间探测Ka频段测控场景和高精度导航需求,开展了相位参考干涉测量总体设计和性能分析。在良好天气、高仰角条件下开展观测,轮询观测周期可取为2 min,参考源角距需小于1°;通过提高通道宽带、带宽综合弥补了射电源流量密度小的不足。基于我国干涉测量网和深空测控设备组成的8站观测网,Ka频段相位参考干涉测量的测角精度预计达0.12~0.23 mas,较X频段约1 mas提升显著,可望有效提高定轨预报精度。
To meet the Ka-band Telemetry,Tracking,and Command and high-precision navigation requirements,the design and performance analysis of Ka-band phase referencing have been conducted.Under good weather and high elevation angle conditions,with a typical switching time of 2 min and a switching angle less than 1°,we compensate for the low Ka-band flux density of radio sources by employing wider channel bandwidths and bandwidth synthesis.Based on the 8-station observation network composed of China's interferometry network and deep space stations,the relative angular positioning accuracy of Ka-band phase referencing is expected to be 0.12~0.23 mas,which is a significant improvement over the X-band accuracy of about 1 mas.The Ka-band phase referencing can effectively improve the accuracy of orbit determination and prediction.
作者
徐得珍
李海涛
陈少伍
李赞
XU Dezhen;LI Haitao;CHEN Shaowu;LI Zan(Beijing Institute of Tracking and Telecommunications Technology,Beijing 100094,China)
出处
《航天工程大学学报》
2025年第5期60-65,共6页
Journal of Space Engineering University
基金
国家重点研发计划项目(2020YFC2200903)。
