Positioning system and fixed station and positioning apparatus f

Details Positioning system and fixed station and positioning apparatus f Positioning system and fixed station and positioning apparatus f

1997-07-30

1999-11-23

Hellner, Mark

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a satellite

701215, G01S 0502

Patent

active

059908254

ABSTRACT:
DGPS data obtained from an FM broadcast wave is extracted by a DGPS data extraction section (226). Adjustment error, the accuracy of which is not very high, has been appended to correction data to be used in actual positioning correction within the obtained DGPS data. A correction value creation section (228) judges, from the contents of DGPS data, which data in a correction value table (230) may be read. The method of this judgment is predetermined. Then, the correction value is created by reading the corresponding correction value from correction value table (230). Next, the correction value and correction data are added in a DGPS data specifying section (232) to yield proper correction data. Position information having high accuracy can be obtained from the obtained proper correction data.

REFERENCES:
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patent: 5510798 (1996-04-01), Bauer
patent: 5589835 (1996-12-01), Gildea et al.
patent: 5638077 (1997-06-01), Martin
Tadao Hayashi, "The Principle and View of the Differential GPS", 1995, No. 315, pp. 184-199.
Bergstrom C: "Correction data for Navstar Global Positioning System transmitted in the RDS channel. Tachnical verification and implement in Sweden", IEE Colloquium `RDS (Radio Data Services)` (Digest No. 1994/249), London, UK, Dec. 15, 1994, pp. 3/1-5, XP002047283.
A Development of D-GPS System From "Toyota Technical Revue" vol. 46, No. 1 May 1996, Toru Ito, pp. 38-44.
"FM Multi-Broadcasting DGPS Data Format Standard", Association of Radio Industries and Businesses, Jun. 1995.

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