Global navigation satellite system, navigation terminal, navigation method and program

A positioning terminal, comprising a positioning module,

• wherein the positioning module is configured to execute processing in parallel while continuously acquiring respective navigation signals from a navigation satellite group of navigation satellites each configured to broadcast a navigation signal for GNSS and continuously performing positioning computation in real time to obtain a positioning computation result, the processing including:
• using a clock offset value group obtained by the positioning computation to calculate a standard deviation value, which is a value of a standard deviation of a jitter amount of the clock offset value group, and a change amount of a difference between time differences being a difference between clock offset values;
• determining two positioning accuracy indices of the positioning computation result determined through calculation based on respective values of the standard deviation value and the change amount of the difference between time differences that have been calculated;
• and
• associating the determined two positioning accuracy indices with the positioning computation result determined through calculation.

A positioning method, which is to be performed by a positioning terminal of a global navigation satellite system,

• the positioning method comprising executing, by the positioning terminal, processing in parallel while continuously acquiring respective navigation signals from a navigation satellite group of navigation satellites each configured to broadcast a navigation signal for GNSS and continuously performing positioning computation in real time to obtain a positioning computation result, the processing including:
• using a clock offset value group obtained by the positioning computation to calculate a standard deviation value, which is a value of a standard deviation of a jitter amount of the clock offset value group, and a change amount of a difference between time differences being a difference between clock offset values;
• determining two positioning accuracy indices of the positioning computation result determined through calculation based on respective values of the standard deviation value and the change amount of the difference between time differences that have been calculated;
• associating the determined two positioning accuracy indices with the positioning computation result determined through calculation;
• and
• outputting in real time the positioning computation result associated with at least the two positioning accuracy indices.

A non-transitory computer-readable recording medium having a program recorded thereon, the program for positioning, for causing a processor of a positioning terminal to be operated to execute processing in parallel while continuously acquiring respective navigation signals from a navigation satellite group of navigation satellites each configured to broadcast a navigation signal for GNSS and continuously performing positioning computation in real time to obtain a positioning computation result, the processing including:

• using a clock offset value group obtained by the positioning computation to calculate a standard deviation value, which is a value of a standard deviation of a jitter amount of the clock offset value group, and a change amount of a difference between time differences being a difference between clock offset values;
• discriminating two positioning accuracy indices of the positioning computation result determined through calculation based on respective values of the standard deviation value and the change amount of the difference between time differences that have been calculated;
• associating the determined two positioning accuracy indices with the positioning computation result determined through calculation;
• and
• outputting in real time the positioning computation result associated with at least the two positioning accuracy indices.