Global positioning device
First Claim
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1. A global positioning device comprising:
- a receiver configured to receive a value of an error used in satellite positioning at a first time interval and receive a first correction value of the error at a second time interval that is 1/n (n is an integer of two or larger) time interval of the first time interval; and
processing circuitry configured to correct the value of the error at the second time interval using the first correction value, whereinthe receiver is further configured to receive, at the first time interval, a first value of a frequency-dependent error that is an error dependent on a frequency of a carrier from a positioning satellite and a second value of a frequency-independent error that is an error independent of the frequency of the carrier and receive, at the second time interval, a second correction value of the frequency-independent error, andthe processing circuitry is further configured to correct the second value of the frequency-independent error at the second time interval using the second correction value.
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Abstract
A correction data creation unit receives a value of an error used in satellite positioning at a first time interval, and receives a correction value of the error at a second time interval that is a time interval 1/n (n is an integer of two or larger) time interval of the first time interval. The correction data creation unit also corrects the value of the error at the second time interval by using the correction value.
32 Citations
14 Claims
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1. A global positioning device comprising:
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a receiver configured to receive a value of an error used in satellite positioning at a first time interval and receive a first correction value of the error at a second time interval that is 1/n (n is an integer of two or larger) time interval of the first time interval; and processing circuitry configured to correct the value of the error at the second time interval using the first correction value, wherein the receiver is further configured to receive, at the first time interval, a first value of a frequency-dependent error that is an error dependent on a frequency of a carrier from a positioning satellite and a second value of a frequency-independent error that is an error independent of the frequency of the carrier and receive, at the second time interval, a second correction value of the frequency-independent error, and the processing circuitry is further configured to correct the second value of the frequency-independent error at the second time interval using the second correction value. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A global positioning device comprising:
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processing circuitry configured to perform positioning calculation using a state quantity including at least either an ionospheric residual or a tropospheric residual that remains after error correction processing is performed on observation data from a positioning satellite, wherein the procession circuitry is further configured to perform time extrapolation calculation on a state quantity of a past epoch including at least either the ionospheric residual or the tropospheric residual to estimate a state quantity of a current epoch including at least either the ionospheric residual or the tropospheric residual, calculate a double difference residual using double difference data obtained by double difference calculation on the observation data, a geometric distance between the positioning satellite and the positioning device obtained from the observation data, and the state quantity of the estimated current epoch, and perform observation update calculation using the double difference residual to update the state quantity of the estimated current epoch. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification