POSITION DETERMINATION WITH REFERENCE DATA OUTAGE
First Claim
1. A rover station for determining a position, the rover station including:
- a positioning signal receiver to receive positioning signals from each of a plurality of positioning satellites;
a reference data receiver to receive reference data from at least one reference station;
a positioning unit to determine a position of the rover station for a first instance in time based on positioning signals for the first instance in time and the reference data for the first instance in time;
an outage detection unit to detect an outage of the reference data from the at least one reference station; and
an error data receiver to receive for each of the satellite clocks error data specifying a satellite clock drift;
wherein the positioning unit is adapted to determine the position of the rover station for a second instance in time based on positioning signals for the second instance in time, the reference data for the first instance in time and the satellite clocks error data at least for the second instance in time.
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Accused Products
Abstract
Position determination at a rover station on the basis of positioning signals from a plurality of positioning satellites. During normal operation a position of the rover station is determined on the basis of the positioning signal from the positioning satellites and reference data received via a separate connection from a reference station. Upon detecting an outage of the reference data from the reference station, error data at least including satellite clock drifts is obtained from error data transmitter and applied in the determination process in order to eliminate positioning errors introduced by satellite clock drifts that cannot be compensated on the basis of the reference data due to the outage.
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Citations
22 Claims
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1. A rover station for determining a position, the rover station including:
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a positioning signal receiver to receive positioning signals from each of a plurality of positioning satellites; a reference data receiver to receive reference data from at least one reference station; a positioning unit to determine a position of the rover station for a first instance in time based on positioning signals for the first instance in time and the reference data for the first instance in time; an outage detection unit to detect an outage of the reference data from the at least one reference station; and an error data receiver to receive for each of the satellite clocks error data specifying a satellite clock drift; wherein the positioning unit is adapted to determine the position of the rover station for a second instance in time based on positioning signals for the second instance in time, the reference data for the first instance in time and the satellite clocks error data at least for the second instance in time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A position determining method, the method including:
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receiving positioning signals from each of a plurality of positioning satellites; receiving reference data from at least one reference station; determining a position of the rover station for a first instance in time based on positioning signals for the first instance in time and the reference data for the first instance in time; detecting an outage of the reference data from the at least one reference station; obtaining for each of the satellite clocks error data specifying a satellite clock drift; and determining the position of the rover station for a second instance in time based on positioning signals for the second instance in time, the reference data for the first instance in time and the satellite clocks error data at least for the second instance in time. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification