Navigation Performance Using Long-Term Ephemeris Extension for Mobile Device

被引:0
|
作者
Li, Yihe [1 ]
Gao, Yang [2 ]
机构
[1] Univ Calgary, Dept Geomat, Calgary, AB T2N 1N4, Canada
[2] Univ Calgary, Dept Geomat Engn, Calgary, AB T2N 1N4, Canada
来源
PROCEEDINGS OF THE 26TH INTERNATIONAL TECHNICAL MEETING OF THE SATELLITE DIVISION OF THE INSTITUTE OF NAVIGATION (ION GNSS 2013) | 2013年
关键词
D O I
暂无
中图分类号
TP39 [计算机的应用];
学科分类号
081203 ; 0835 ;
摘要
Long-term ephemeris extension is needed in challenging environments in order to reduce the Time-To-First-Fixed (TTFF). It makes quick position fix possible for mobile devices while they are still acquiring the broadcast ephemeris. Based on the experiment results described in this paper, the median User Range Error (URE) for the extended ephemeris after one week and four weeks is 5.68m and 88.98m, respectively. Simulated signal obstruction experiments are also conducted to assess the position fix accuracy, availability and reliability based on different mean square positional error (MSPE) thresholds, prediction durations and obstruction scenarios. The results have shown 95.57% navigation availability at 99.28% reliability with one obstruction and 83.37% navigation availability at 97.12% reliability with two obstructions based on a user-defined MSPE of 50m after one week prediction.
引用
收藏
页码:1642 / 1651
页数:10
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