POSITIONING DEVICE, METHOD OF CONTROLLING POSITIONING DEVICE, AND RECORDING MEDIUM
First Claim
1. A method at a positioning device, comprising:
- calculating a first height by two-dimensional positioning based on a satellite signal and an estimated height indicating a distance from a center of the earth;
calculating a second height by three-dimensional positioning based on the satellite signal; and
updating the estimated height by using the first height or the second height.
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Abstract
A positioning device includes an estimated height storage section which stores an estimated height H1, a signal reception section which receives a satellite signal which is a signal from a satellite positioning system (SPS) satellite, a two-dimensional height calculation section which calculates a two-dimensional height H2c by two-dimensional positioning using the estimated height H1, a three-dimensional height calculation section which calculates a three-dimensional height H2b by preliminary three-dimensional positioning during two-dimensional positioning, a height selection section which selects the two-dimensional height H2b or the three-dimensional height H2c in order to update the estimated height H1, and an updating section which updates the estimated height H1 with the two-dimensional height H2b or the three-dimensional height H2c selected by the height selection section.
6 Citations
16 Claims
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1. A method at a positioning device, comprising:
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calculating a first height by two-dimensional positioning based on a satellite signal and an estimated height indicating a distance from a center of the earth; calculating a second height by three-dimensional positioning based on the satellite signal; and updating the estimated height by using the first height or the second height. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A positioning device, comprising:
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a first height calculator that calculates a first height by two-dimensional positioning based on a satellite signal and an estimated height indicating a distance from a center of the earth; a second height calculator that calculates a second height by three-dimensional positioning based on the satellite signal; and an estimated height updater that updates the estimated height by using the first height or the second height. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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Specification