发明名称 |
Wide area differential GPS reference system and method |
摘要 |
A GPS reference system and corresponding method utilizing a network of reference stations and a master station. Each reference station receives GPS signals from GPS satellites it observes and computes in response a pseudo-range residual for each GPS satellite it observes. The master station is in communication with the reference stations to receive the computed pseudo-range residuals and comprises a pseudo-range residual synchronizer, an ephemeris and clock correction estimator for each GPS satellite observed by the reference stations, and a transmitter. The pseudo-range residual synchronizer is responsive to the received pseudo-range residuals in order to compute clock differences between the reference stations and remove the clock differences from the received pseudo-range residuals so as to synchronize them. Each ephemeris and clock correction estimator computes an ephemeris correction and a clock correction for the corresponding GPS satellite in response to each synchronized pseudo-range residual for the corresponding GPS satellite. The transmitter transmits to users the computed ephemeris and clock corrections for each GPS satellite observed by the reference stations.
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申请公布号 |
US5621646(A) |
申请公布日期 |
1997.04.15 |
申请号 |
US19960681087 |
申请日期 |
1996.07.22 |
申请人 |
STANFORD UNIVERSITY |
发明人 |
ENGE, PER K.;WALTER, TODD F.;CHAO, YI-CHUNG |
分类号 |
G01S1/00;G01S5/14;G01S19/32;G01S19/44;(IPC1-7):G01S5/02 |
主分类号 |
G01S1/00 |
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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