Abstract: A positioning terminal is provided and identifies, as appropriate, a satellite to be excluded, thereby improving positioning accuracy. A processor acquires a signal-to-noise ratio (SNR) and an angle of elevation for each satellite. The processor next identifies a satellite for which the SNR is less than a shielding SNR mask as a multipath satellite and selects the satellite to be excluded. The processor next generates positioning terminal positioning data using a positioning signal from satellites other than the satellite to be excluded. The processor next uses reference station positioning data and positioning terminal positioning data of the selected satellite to execute an RTK calculation.

Abstract: According to the present application, when an inter frequency bias (IFB) calibration value, which corresponds to a machine type ID of a reference station, is not stored in a storage, a processor executes a Real Time Kinematic (RTK) calculation by using reference station-positioning data and positioning terminal-positioning data, calculates a positioning solution, and causes the storage to store the reference station-positioning data and the positioning terminal-positioning data. The processor executes, after completing a positioning processing, an estimation processing of the IFB calibration value by using the reference station-positioning data and the positioning terminal-positioning data which are stored in the storage.

Abstract: The present application: receives positioning data from each of a plurality of positioning terminals that have received positioning signals transmitted from a plurality of satellites; uses the received positioning data to detect, for each satellite, the difference between the positioning signal reception quality at a first positioning terminal and the positioning signal reception quality at at least one second positioning terminal; and uses the difference for each satellite to determine a satellite to be used for positioning computation for the first positioning terminal.

Abstract: In a case where a first RTK positioning solution is a fixed solution and a second RTK positioning solution is a float solution, a processor estimates a position of a second receiver based on the first RTK positioning solution, inter-antenna distance, and antenna azimuth angle to set an area within a circle with radius centered on the estimated position as a search range. Next, the processor calculates an integer ambiguity within the search range obtained in the RTK calculation as a second RTK positioning solution. Then, the processor outputs the first RTK positioning solution and the second RTK positioning solution as positioning solutions (current coordinates of a moving object).

Abstract: A positioning terminal is provided and identifies, as appropriate, a satellite to be excluded, thereby improving positioning accuracy. A processor acquires a signal-to-noise ratio (SNR) and an angle of elevation for each satellite. The processor next identifies a satellite for which the SNR is less than a shielding SNR mask as a multipath satellite and selects the satellite to be excluded. The processor next generates positioning terminal positioning data using a positioning signal from satellites other than the satellite to be excluded. The processor next uses reference station positioning data and positioning terminal positioning data of the selected satellite to execute an RTK calculation.

Abstract: In a case where a magnitude of a speed difference vector is smaller than a threshold in a state where a fixed solution is obtained continuously for a first time, a processor outputs a current RTK positioning solution as current coordinates of a moving object. On the other hand, when the magnitude of the speed difference vector is equal to or greater than the threshold in a state where the fixed solution is obtained continuously for the first time, the processor outputs a DR solution as the current coordinates of the moving object.

Abstract: The present disclosure can perform positioning of a terminal even though a communication bandwidth capable of being used by a reference station is narrow. In a positioning method, a positioning system, a correction information generation method, and a correction information generation apparatus of the present disclosure, coordinates of a terminal are positioned by using the reference station, a plurality of relay stations communicating with the reference station, and the terminal communicating with the relay station. In the positioning method, the positioning system, the correction information generation method, and the correction information generation apparatus of the present disclosure, information for specifying the relay station communicating with the terminal is acquired, and the correction information is generated based on the positioning signal from a satellite which is received by the reference station based on the coordinates of the relay station communicating with the terminal.

Abstract: A positioning system includes a receiver that receives a positioning signal from a positioning satellite and generates carrier phase information, a base station that receives the carrier phase information from the receiver, and a communication terminal that performs wireless communication with the base station. The base station transmits information including the carrier phase information and the position information of the receiver as a carrier positioning signal to the communication terminal and the communication terminal performs carrier positioning using the carrier positioning signal transmitted by the base station. Here, the base station encrypts the position information of the receiver, in the carrier positioning signal to be transmitted.

Abstract: In a case where a magnitude of a speed difference vector is smaller than a threshold in a state where a fixed solution is obtained continuously for a first time, a processor outputs a current RTK positioning solution as current coordinates of a moving object. On the other hand, when the magnitude of the speed difference vector is equal to or greater than the threshold in a state where the fixed solution is obtained continuously for the first time, the processor outputs a DR solution as the current coordinates of the moving object.

Abstract: In a case where a first RTK positioning solution is a fixed solution and a second RTK positioning solution is a float solution, a processor estimates a position of a second receiver based on the first RTK positioning solution, inter-antenna distance, and antenna azimuth angle to set an area within a circle with radius centered on the estimated position as a search range. Next, the processor calculates an integer ambiguity within the search range obtained in the RTK calculation as a second RTK positioning solution. Then, the processor outputs the first RTK positioning solution and the second RTK positioning solution as positioning solutions (current coordinates of a moving object).

Abstract: According to the present application, when an inter frequency bias (IFB) calibration value, which corresponds to a machine type ID of a reference station, is not stored in a storage, a processor executes a Real Time Kinematic (RTK) calculation by using reference station-positioning data and positioning terminal-positioning data, calculates a positioning solution, and causes the storage to store the reference station-positioning data and the positioning terminal-positioning data. The processor executes, after completing a positioning processing, an estimation processing of the IFB calibration value by using the reference station-positioning data and the positioning terminal-positioning data which are stored in the storage.

Abstract: In a positioning method and a terminal according to the present disclosure, a processor positions a location of the terminal through interferometric positioning using a plurality of positioning signals received from a plurality of satellites. The processor calculates an integer bias for the plurality of positioning signals, selects a group of location candidates based on a float solution acquired through the calculation of the integer bias, and notifies that the terminal is located at a predetermined point on a map under a condition in which the group of location candidates is included in a line-shaped area.

Abstract: A positioning system includes a receiver that receives a positioning signal from a positioning satellite and generates carrier phase information, a base station that receives the carrier phase information from the receiver, and a communication terminal that performs wireless communication with the base station. The base station transmits information including the carrier phase information and the position information of the receiver as a carrier positioning signal to the communication terminal and the communication terminal performs carrier positioning using the carrier positioning signal transmitted by the base station. Here, the base station encrypts the position information of the receiver, in the carrier positioning signal to be transmitted.

Abstract: The present disclosure can perform positioning of a terminal even though a communication bandwidth capable of being used by a reference station is narrow. In a positioning method, a positioning system, a correction information generation method, and a correction information generation apparatus of the present disclosure, coordinates of a terminal are positioned by using the reference station, a plurality of relay stations communicating with the reference station, and the terminal communicating with the relay station. In the positioning method, the positioning system, the correction information generation method, and the correction information generation apparatus of the present disclosure, information for specifying the relay station communicating with the terminal is acquired, and the correction information is generated based on the positioning signal from a satellite which is received by the reference station based on the coordinates of the relay station communicating with the terminal.

Abstract: In a positioning method and a terminal according to the present disclosure, a processor positions a location of the terminal through interferometric positioning using a plurality of positioning signals received from a plurality of satellites. The processor calculates an integer bias for the plurality of positioning signals, selects a group of location candidates based on a float solution acquired through the calculation of the integer bias, and notifies that the terminal is located at a predetermined point on a map under a condition in which the group of location candidates is included in a line-shaped area.