A Long-Term Analysis of the GPS Broadcast Orbit and Clock Error Variations

摘要：

　　The computation of a navigation satellite position and clock is a general task in GPS positioning,and the data needed for this task can be obtained from navigation messages and IGS precise ephemerides.This study analyzes broadcast orbit and clock error variations by comparing them with IGS precise ephemerides.Orbit and clock errors from 2001 to 2013 are computed for all GPS satellites as well as for the group of satellites visible in Korea.Orbit and clock errors versus GPS satellite types are also analyzed.Correlations with shadow conditions,solar activity,and geomagnetic activity are analyzed.Clock errors and signal-in-space range errors are reduced with the new generation of GPS satellites.The correlations show that orbit errors increase by 3.2%in shadows.Solar activity and orbit error have a high correlation until 2008,but have a low correlation after 2009.

关键词： GPS Broadcast Ephemeris IGS Precise Ephemeris SISRE

作者: Mingyu Kim Jeongrae Kim

作者单位: School of Aerospace and Mechanical Engineering,Korea Aerospace University,Gyeonggi-do,412-791,Korea

会议类型: 国际会议

会议名称: 2014 Asia-Pacific International Symposium on Aerospace Technology(2014亚太航空航天技术学术会议)

会议地点: 上海

会议语种:英文

页码: 1-5

在线出版日期: 2014-09-24（万方平台首次上网日期，不代表论文的发表时间）