Method for determining the location of a GPS receiver using an estimated reference time
December 18, 2017. 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 ReferencesHybrid GPS/data line unit for rapid, precise, and robust position determination No-outage GPS/commercial RF positioning system Integrity monitoring of differential satellite positioning system signals Inverse differential corrections for SATPS mobile stations Method and apparatus for calibration of a GPS receiver Integrity monitoring of location and velocity coordinates from differential satellite positioning systems signals Patent #: 5831576 InventorApplicationNo. 993492 filed on 12/18/1997US Classes:342/357.15, Satellite selection (i.e., tracking or acquisition)342/357.1, Combined with telecommunication701/214Means to improve accuracy of position or locationExaminersPrimary: Blum, Theodore M.Attorney, Agent or FirmForeign Patent References
International ClassesH04B 007/185G01S 005/02 AbstractA method for determining the location of a satellite receiver. The method begins by selecting a trial time for use in calculating a presumed location of the receiver using at least four satellites. The presumed location is calculated based on the selected trial time. A first range from the presumed location to a fifth satellite is calculated and a second range from the presumed location to the fifth satellite is measured. A comparison is then made between the first range to the second range. If the first range is unequal to the second range the presumed location is not the actual location. A new trial time is selected and the method is repeated. When the first range and the second range are substantially the same then the presumed location is the actual location.Other References
Field of SearchSpace satelliteCell projection With plural repeater or relay systems With position indicating Including a satellite Using differential correction Using Doppler frequency shift Using low Earth orbit (telecommunication) satellites With accuracy enhancing Using Global Positioning Satellite (GPS or Glonass) Determining relative position (e.g., distance or direction) Satellite selection (i.e., tracking or acquisition) With transmission of location-indicative information to or from a remote station Combined with telecommunication Means to improve accuracy of position or location | |
