GPS箭上自定位结果与测量船船载定位结果剪刀差问题分析  

Analysis of the Scissors Error between the GPS Onboard Positioning Result and Ship-borne Locating Result

作　　者：饶爱水[1] 奚宏明[1] 王振平[1] 裴澍炜[1] 吴关鹏[1] 

机构地区：[1]中国卫星海上测控部,江阴214431

出　　处：《遥测遥控》2013年第2期41-45,共5页Journal of Telemetry,Tracking and Command

摘　　要：在某次卫星发射测量数据事后处理分析过程中发现,船载定位结果与箭上自定位结果存在5ms时延偏差。针对此问题,从箭载GPS数据处理模型出发,重点分析船载定位结果解算方法、GPS定位的误差源以及GPS时间。分析结果表明,船载定位结果解算时采用的GPS数据误差处理模型,是导致解算的目标位置与箭上自定位结果存在偏差的根本原因。考虑地球自转效应后,船载定位结果与箭上自定位结果的差异可控制在10m左右。Through the analysis of the off-line tracking data processing of satellite launching measurement,it is found that there's 5ms time-delay error between the GPS onboard positioning result and ship-borne locating result.In this paper the analysis is focused on the ship-borne locating algorithm,GPS positioning error sources and GPS time.The result indicates that the GPS data processing model,which is applied to the ship-borne locating calculation,is the root cause of the deviation existed between the target position and GPS onboard positioning result,and it has no relationship with the GPS time scale calculation.Finally,the ship-borne locating result is significantly improved by taking the earth rotation effect into account,and the gap between the GPS onboard positioning result and ship-borne locating result can be controlled around 10m.

关 键 词：航天测量船 箭载GPS 剪刀差 

分 类 号：TN965.5[电子电信—信号与信息处理]