摘要
以考虑位置误差相关项的伪距率观测模型,对遥感中使用的 SINS/GPS伪距、伪距率组合系统进行了蒙特卡洛仿真.结果表明,组合系统的长期位置精度能达到 5 m以内; GPS数据更新率低于 SINS,在 GPS测量时间间隔内,组合系统的性能仅由 SINS决定.虽然 SINS的误差随时间积累,但在GPS测量时间间隔为秒数量级的情况下,即使采用中等精度的惯性仪表,其相对位置精度可达到厘米级(这里相对位置精度指组合系统在 GPS测量时间间隔内位置误差的变化范围).
The main aim using SINS/GPS integrated system in navigation is to improve long-term accuracy. For remote sensing application, both long-term accuracy and short-term accuracy are important. The SINS/GPS pseudo-range and pseudo-range rate integrated navigation system are studied based on the precise model of pseudorange rate in which position error is concerned in this paper. Simulation results show that the long-term position error of integrated system is within 5 meters. If the middling accuracy inertial instrument is used, the relative change of position error in the time interval of GPS measurement is centimeter level.
出处
《空间科学学报》
CAS
CSCD
北大核心
2001年第1期86-91,共6页
Chinese Journal of Space Science
基金
中国博士后科学基金项目资助