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公开(公告)号：EP1794612A2
公开(公告)日：2007-06-13
申请号：EP05798125.0
申请日：2005-09-08
IPC分类号： G01S5/14
CPC分类号： G01S19/27 , G01S19/05 , G01S19/20 , G01S19/258 , G01S19/51
摘要： Devices and methods are described for determining position information without broadcast ephemeris data for extended time periods. A server or client device 110 receives or collects historical state data of satellites of a satellite-based positioning system and generates predictions of future satellite trajectories for future time periods. When a server generates the predictions, the predictions are subsequently transferred to a client device. The client device selects predictions appropriate to time of interest. The time can be any time during a period of at least seven calendar days. The client device reconstructs satellite states using information on the predictions and uses the reconstructed satellite states to acquire satellite signals as appropriate to the current location and time of the client device. The client device determines and/or tracks its position using information of the satellite states and timing information of the satellite signals.
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2.发明公开
公开(公告)号：EP2087367A2
公开(公告)日：2009-08-12
申请号：EP07871314.6
申请日：2007-10-31
IPC分类号： G01S1/00
CPC分类号： G01S19/27
摘要： Devices and methods are described for determining position information without broadcast ephemeris data for extended time periods. A client device is disclosed that stores satellite states determined from broadcast ephemeris and numerically integrates equations of motion with regard to the stored satellite states to determine current satellites states. The client device uses the current satellite states in conjunction with received satellite signals to determine where the satellite signals were received.
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公开(公告)号：EP1794612B1
公开(公告)日：2011-08-17
申请号：EP05798125.0
申请日：2005-09-08
IPC分类号： G01S19/27
CPC分类号： G01S19/27 , G01S19/05 , G01S19/20 , G01S19/258 , G01S19/51
摘要： Devices and methods are described for determining position information without broadcast ephemeris data for extended time periods. A server or client device 110 receives or collects historical state data of satellites of a satellite-based positioning system and generates predictions of future satellite trajectories for future time periods. When a server generates the predictions, the predictions are subsequently transferred to a client device. The client device selects predictions appropriate to time of interest. The time can be any time during a period of at least seven calendar days. The client device reconstructs satellite states using information on the predictions and uses the reconstructed satellite states to acquire satellite signals as appropriate to the current location and time of the client device. The client device determines and/or tracks its position using information of the satellite states and timing information of the satellite signals.
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