发明名称 |
Method and system for GPS position determination from calculated time |
摘要 |
<p>A navigation-satellite receiver comprises means for initialization that gets a head start by knowing time to within a few seconds and position to within 150 kilometers. A two-dimensional grid of points is setup with constant altitude that represents solution starting points within the 150 kilometer area. Fractional pseudoranges from each satellite in a constellation are inspected for a best initial fit with the points in the grid. A variety of time bias adjustments within the time bounds are also tried against the points to find a best fitting point. That point then is used in a drive to find the final solution and to produce the first fix from cold start. <IMAGE></p> |
申请公布号 |
EP1336864(B1) |
申请公布日期 |
2013.05.15 |
申请号 |
EP20020028095 |
申请日期 |
2002.12.17 |
申请人 |
ERIDE, INC.;SEIKO EPSON CORPORATION |
发明人 |
EDWARDS, STEPEHN J.;MCBURNEY, PAUL W. |
分类号 |
G01S5/14;G04G5/00;G01S1/00;G01S19/25;G01S19/42 |
主分类号 |
G01S5/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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