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The GPS receiver which outputs 2DRMS which utilizes URA, in calculation of 2DRMS calculation manner, and
The GPS receiver which outputs 2DRMS which utilizes URA, in calculation of 2DRMS calculation manner, and
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机译:在2DRMS计算方式的计算中,输出利用URA的2DRMS的GPS接收机,以及
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摘要
PROBLEM TO BE SOLVED: To provide a GPS receiver capable of adaptably estimating an error in a GPS system, even if reliability of a GPS system is improved or deteriorated, and accurately reflecting that in a 2DRMS.;SOLUTION: The GPS receiver using a Kalman filter for calculating a positioning solution uses an estimated error σH-Kalman in a horizontal (latitude, longitude) direction calculated from diagonal elements of an error covariance matrix obtained in a calculating process for an estimated value for the Kalman filter for calculating the 2DRMS in accordance with a definition, 2DRMS =2×{(σH-Kalman)2+(HDOP×σUERE)2}1/2 and outputting it together with the GPS positioning solution. Herein, σUERE calculates the URA as a 1σvalue for an error based on URA Index contained in a GPS message and σUserSeg as a 1σ value for an error in a user segment out of GPS system segments in accordance with the following definition: σUERE=(URA2+σUserSeg2)1/2.;COPYRIGHT: (C)2003,JPO
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