Method and system for location-dependent time-specific correction data
First Claim
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1. A method for delivery of location-dependent time-specific corrections, said method comprising:
- generating a first extended-lifetime correction for a first region, wherein said first extended-lifetime correction comprises a virtual reference station correction plus error data descriptive of a plurality of positioning signals, wherein said error data is useable to extrapolate future corrections;
using a distribution timetable to determine a first time for transmitting said first extended-lifetime correction to said first region and to determine a first time interval on which to transmit successive extended-lifetime corrections for said first region to said first region; and
transmitting said first extended-lifetime correction via a wireless communication network to said first region in accordance with said distribution timetable.
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Abstract
A method and system for delivery of location-dependent time-specific corrections. In one embodiment, a first extended-lifetime correction for a first region is generated. A distribution timetable is used to determine a first time interval for transmitting the first extended-lifetime correction to the first region. The first extended-lifetime correction is then transmitted via a wireless communication network to said first region in accordance with said distribution timetable.
69 Citations
35 Claims
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1. A method for delivery of location-dependent time-specific corrections, said method comprising:
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generating a first extended-lifetime correction for a first region, wherein said first extended-lifetime correction comprises a virtual reference station correction plus error data descriptive of a plurality of positioning signals, wherein said error data is useable to extrapolate future corrections; using a distribution timetable to determine a first time for transmitting said first extended-lifetime correction to said first region and to determine a first time interval on which to transmit successive extended-lifetime corrections for said first region to said first region; and transmitting said first extended-lifetime correction via a wireless communication network to said first region in accordance with said distribution timetable. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for delivery of location-dependent time-specific corrections, said method comprising:
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storing a copy of a distribution timetable within a rover station in a first region; said rover station using said distribution timetable to determine a time for receiving a correction which is intended for said first region and a time interval for which said correction is configured to be usable for, wherein said time interval comprises a period greater than one second, wherein said correction comprises a virtual reference station correction plus error data descriptive of a plurality of positioning signals, wherein said error data is useable to extrapolate future corrections for greater than one second; and said rover station using said correction to determine a first corrected geographic position in said first region. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A rover station for determining a position, said rover station comprising:
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a positioning signal receiver configured to receive positioning signals from each of a plurality of positioning satellites; at least one wireless communication device configured to receive an extended-lifetime correction intended for a region to which said rover station is proximate via a wireless communication network, wherein said extended-lifetime correction comprises a virtual reference station correction plus error data descriptive of a plurality of positioning signals, wherein said error data is useable to extrapolate future corrections; and a processor configured to access a distribution timetable which defines a time for receiving said extended-lifetime correction which is intended for said region and further defines a time interval on which to receive successive extended-lifetime corrections intended for said region. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26)
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27. A system for delivery of location-dependent time-specific corrections comprising:
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a master reference station comprising; a distribution timetable controller input system for selectively accessing a distribution timetable and identifying a region for delivery of an extended-lifetime correction at a defined time and for delivery of successive extended-lifetime corrections for said region on a defined time interval; a corrections region selection system configured to identify at least one Global Navigation Satellite System (GNSS) reference station which is associated with said region; a corrections processor configured to access data from said at least one GNSS reference station and to generate said virtual reference station correction for said region for a first instance in time based upon positioning signals from each of a plurality of positioning satellites; an error generator configured to generate an instance of error data descriptive of said positioning signals for the first instance in time; and a communicative coupling with a wireless communication network; and a rover station configured to determine a first geographic position based upon the positioning signals from each of the plurality of positioning satellites and to receive said extended-lifetime correction via said wireless communication network, wherein said extended-lifetime correction comprises said virtual reference station correction and said instance of error data, wherein said error data is useable to extrapolate future corrections. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35)
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Specification