Conversion device and computer readable medium

Patent metadata

Field	Value
Publication number	US-2017123072-A1
Application number	US-201515319188-A
Country	US
Kind code	A1
Filing date	Jun 16, 2015
Priority date	Jun 17, 2014
Publication date	May 4, 2017
Grant date	—

Abstract

A mechanism converts positioning correction information included in an SSR message as defined by “RTCM STANDARD 10403.2” to positioning correction information conforming to “RTCM 10402.3”. A conversion device includes a computation processing section that acquires a plurality of types of positioning correction information conforming to “RTCM STANDARD 10403.2”, an approximate position being a positioning result, and a satellite position of a satellite that transmits positioning information based on which the approximate position is calculated, and based on the types of positioning correction information, the approximate position, and the satellite position that have been acquired, generates pieces of element data, such as CLR and ORB, which are elements used for generating the types of positioning correction information conforming to “RTCM 10402.3”, by computation, and a conversion calculation section that generates the types of positioning correction information conforming to “RTCM 10402.3”, based on the pieces of element data.

First claim

1 . A conversion device comprising:
a computation processing section to acquire a plurality of types of positioning correction information conforming to a first specification and used for correcting a positioning error resulting from a satellite that transmits positioning information and a positioning error resulting from a propagation path of the positioning information, an approximate position being a positioning result, and a satellite position of the satellite that transmits the positioning information based on which the approximate position is calculated, and based on the plurality of types of positioning correction information, the approximate position, and the satellite position that have been acquired, generate a plurality of pieces of element data which are elements used for generating a plurality of types of positioning correction information conforming to a second specification, by computation; and a conversion calculation section to generate the plurality of types of positioning correction information conforming to the second specification, based on the plurality of pieces of element data generated by the computation processing section.

2 . The conversion device according to claim 1 , further comprising:
a correction information generation section to generate, as element data, correction information for correcting a position-dependent error which is an error resulting from a positioning position, based on the approximate position and the satellite position, wherein the conversion calculation section generates the plurality of types of positioning correction information conforming to the second specification, based on the plurality of pieces of element data generated by the computation processing section and a plurality of pieces of the element data generated by the correction information generation section.

3 . The conversion device according to claim 2 ,
wherein the correction information generation section generates element data of a solid earth tide effect and element data of a phase wind-up.

4 . The conversion device according to claim 1 , wherein
the computation processing section acquires a satellite orbit error, a satellite signal bias, and a satellite clock error, as each piece of the positioning correction information for correcting the positioning error resulting from the satellite that transmits the positioning information, and acquires tropospheric delay information and ionospheric delay information as each piece of the positioning correction information for correcting the positioning error resulting from the propagation path of the positioning information.

5 . The conversion device according to claim 1 , wherein
the first specification is a specification in which a parameter being a state amount for positioning reinforcement is defined for each positioning error source that causes a positioning error, and the second specification is a specification in which at least one of an observation amount used for positioning and a correction amount of the observation amount is defined.

6 . A non-transitory computer readable medium storing a program for causing a computer to execute:
processing to acquire a plurality of types of positioning correction information conforming to a first specification and used for correcting a positioning error resulting from a satellite that transmits positioning information and a positioning error resulting from a propagation path of the positioning information, an approximate position being a positioning result, and a satellite position of the satellite that transmits the positioning information based on which the approximate position is calculated, and based on the plurality of types of positioning correction information, the approximate position, and the satellite position that have been acquired, generate a plurality of pieces of element data which are elements used for generating a plurality of types of positioning correction information conforming to a second specification, by computation; and processing to generate the plurality of types of positioning correction information conforming to the second specification, based on the plurality of pieces of element data that have been generated.

7 . The non-transitory computer readable medium according to claim 6 , wherein
the first specification is a specification in which a parameter being a state amount for positioning reinforcement is defined for each positioning error source that causes a positioning error, and the second specification is a specification in which at least one of an observation amount used for positioning and a correction amount of the observation amount is defined.

Assignees

• Mitsubishi Electric Corp

Inventors

• Miya Masakazu
• Sato Yuki
• Fujita Seigo
• Terao Kazuhiro
• Saito Masayuki

Classifications

• G01S19/35

  Constructional details or hardware or software details of the signal processing chain · CPC title

• G01S19/40

  Correcting position, velocity or attitude · CPC title

• G01S19/072 Primary

  Ionosphere corrections · CPC title

• G01S19/41

  Differential correction, e.g. DGPS [differential GPS] · CPC title

• G01S19/43

  using carrier phase measurements, e.g. kinematic positioning; using long or short baseline interferometry · CPC title