发明名称 |
Method and apparatus for calculating a figure of merit for gps position using nmea 0183 output |
摘要 |
This invention relates to a method and apparatus for qualifying and quantifying the quality of navigational data emanating from any GPS receiver using its NMEA 0183 output messages for use in a dead reckoning system. It does this by deriving a first distance measurement travelled for a predetermined time period from a dead reckoning system or a GPS system. It then also calculates a second distance being the distance between two global positioning system (GPS) position measurements in the predetermined time. Finally, it calculates the difference between the first and second distances to derive a distance error. The statistical variance of the distance errors derived by repeating the above steps a predetermined number of times is representative of a figure of merit of a prior GPS position of the vehicle.
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申请公布号 |
US2005065722(A1) |
申请公布日期 |
2005.03.24 |
申请号 |
US20040498330 |
申请日期 |
2004.11.01 |
申请人 |
WOOD CHRISTOPHER RICHARD;MACE OWEN |
发明人 |
WOOD CHRISTOPHER RICHARD;MACE OWEN |
分类号 |
G01C21/12;G01S1/00;G01S5/14;G01S19/23;G01S19/49;(IPC1-7):G01C21/26 |
主分类号 |
G01C21/12 |
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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