Method and apparatus for satellite positioning system based time measurement
May 7, 2018. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesNavigation system and method Method and apparatus for measuring elapsed time between an initiating event and a dependent event Null processing receiver apparatus and method 5117232 Vehicle tracking system employing global positioning system (GPS) satellites Null processing and beam steering receiver apparatus and method Passive high accuracy geolocation system and method Precise universal time for vehicles GPS tracking system Separated GPS sensor and processing system for remote GPS sensing and centralized ground station processing for remote mobile position and velocity determinations InventorAssigneeApplicationNo. 074521 filed on 05/07/1998US Classes:342/357.02, With accuracy enhancing342/357.09, With transmission of location-indicative information to or from a remote station701/215Having multiple GPS antennas or receivers (e.g., differential GPS)ExaminersPrimary: Blum, Theodore M.Attorney, Agent or FirmForeign Patent References
International ClassesH04B 007/185G01S 005/02 AbstractA method and apparatus for measuring time related to satellite data messages which are used with satellite positioning systems (SPS). In one method, a first record of at least a portion of a satellite data message is received at an entity, which is typically a basestation. The first record is compared with a second record of the satellite data message, where the first record and the second record overlap at least partially in time. Then a time is determined from this comparison, and this time indicates when the first record (or the source from which the first record was obtained) was received at a remote entity which is typically a mobile SPS receiver. Various other methods of the invention are described and various apparatuses of the invention are also described. The methods and apparatuses measure time of day using SPS signals without reading the satellite data messages which are transmitted as data within these signals. The methods and apparatuses are suitable for situations in which the received signal level is too weak to allow reading of the satellite data messages.Other References
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