Global navigation satellite system, positioning terminal, positioning method, and recording medium
First Claim
1. A positioning terminal, comprising:
- a broadcast wave signal processing unit configured to receive at least a plurality of navigation signals to output ranging observation data;
a correction unit configured to, in a process of causing each value of error including an ambiguity and a tropospheric propagation delay amount to converge through continuous observation, simultaneously with processing relating to a determination of the ambiguity, acquire and store to a storage area, a value of the tropospheric propagation delay amount that has been measured within an area close to a position of the positioning terminal from another device, and use the value of the tropospheric propagation delay amount as an initial value or one value to be added for the continuous observation, and simultaneously with processing relating to a determination of the tropospheric propagation delay amount, acquire each value of the position of the positioning terminal recorded in advance in the storage area and the value of the tropospheric propagation delay amount that has been measured within the area close to the position of the positioning terminal from the another device to calculate a value of the ambiguity, use the calculated value of the ambiguity as an initial value or one value to be added for the continuous observation, and then determine each value of the error to be used for correction, and execute the correction of the ranging observation data; and
a positioning calculation unit configured to perform precise point positioning (PPP) calculation by canceling an error component based on the ranging observation data corrected by the correction unit to calculate the position of the positioning terminal having the error components canceled.
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Accused Products
Abstract
Provided is a positioning terminal of a global navigation satellite system configured to: receive a plurality of navigation signals and an augmentation signal from a plurality of navigation satellites and an augmentation satellite; acquire, in a process of causing each value of error causes including an ambiguity to converge through a plurality of times of observation to enhance an accuracy of positioning through continuous observation, each value of a position of the positioning terminal recorded in advance in a storage area to calculate each value of the error cause, and use the calculated each value as an initial value and/or one value to be added for the continuous observation to cause each value of the error cause to converge; and successively perform positioning calculation.
13 Citations
10 Claims
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1. A positioning terminal, comprising:
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a broadcast wave signal processing unit configured to receive at least a plurality of navigation signals to output ranging observation data; a correction unit configured to, in a process of causing each value of error including an ambiguity and a tropospheric propagation delay amount to converge through continuous observation, simultaneously with processing relating to a determination of the ambiguity, acquire and store to a storage area, a value of the tropospheric propagation delay amount that has been measured within an area close to a position of the positioning terminal from another device, and use the value of the tropospheric propagation delay amount as an initial value or one value to be added for the continuous observation, and simultaneously with processing relating to a determination of the tropospheric propagation delay amount, acquire each value of the position of the positioning terminal recorded in advance in the storage area and the value of the tropospheric propagation delay amount that has been measured within the area close to the position of the positioning terminal from the another device to calculate a value of the ambiguity, use the calculated value of the ambiguity as an initial value or one value to be added for the continuous observation, and then determine each value of the error to be used for correction, and execute the correction of the ranging observation data; and a positioning calculation unit configured to perform precise point positioning (PPP) calculation by canceling an error component based on the ranging observation data corrected by the correction unit to calculate the position of the positioning terminal having the error components canceled. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A positioning method to be performed by a positioning terminal of a global navigation satellite system (GNSS), comprising:
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acquiring, by the positioning terminal, from a plurality of navigation satellites for the GNSS and an information source configured to output a precise ephemeris and correction information, a plurality of navigation signals, the precise ephemeris, and the correction information; acquiring, by the positioning terminal, in a process of causing each value of error including an ambiguity and a tropospheric propagation delay amount to converge through continuous observation, simultaneously with processing relating to a determination of the ambiguity, acquire and store to a storage area, a value of the tropospheric propagation delay amount that has been measured within an area close to a position of the positioning terminal from another device, and use the value of the tropospheric propagation delay amount as an initial value or one value to be added for the continuous observation, and simultaneously with processing relating to a determination of the tropospheric propagation delay amount, acquire each value of the position of the positioning terminal recorded in advance in the storage area and the value of the tropospheric propagation delay amount that has been measured within the area close to the position of the positioning terminal from the another device to calculate a value of the ambiguity, use the calculated value of the ambiguity as an initial value or one value to be added for the continuous observation, and then determine each value of the error to be used for correction, and execute the correction of the ranging observation data; and preforming, by the positioning terminal, precise point positioning (PPP) calculation by canceling an error component based on the ranging observation data corrected to calculate the position of the positioning terminal having the error components canceled.
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10. A recording medium having a program non-transitorily recorded thereon,
the program causing a processor included in a positioning terminal to operate so as to: -
acquire, in a process of causing each value of error including an ambiguity and a tropospheric propagation delay amount to converge through continuous observation to enhance an accuracy of precise point positioning (PPP); simultaneously with processing relating to a determination of the ambiguity, acquire and store to a storage area, a value of the tropospheric propagation delay amount that has been measured within an area close to a position of the positioning terminal from another device, and use the value of the tropospheric propagation delay amount as an initial value or one value to be added for the continuous observation; and simultaneously with processing relating to a determination of the tropospheric propagation delay amount, acquire each value of the position of the positioning terminal recorded in advance in the storage area and the value of the tropospheric propagation delay amount that has been measured within the area close to the position of the positioning terminal from the another device to calculate a value of the ambiguity, use the calculated value of the ambiguity as an initial value or one value to be added for the continuous observation, and then determine each value of the error cause to be used for correction, and execute the correction of the ranging observation data.
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Specification