Satellite position measurement system

• US 20030154026A1
• Filed: 02/06/2003
• Published: 08/14/2003
• Est. Priority Date: 04/11/2001
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Topcon
• Original Assignee: Kabushiki Kaisha Topcon, Mitsui & Company Limited
• Inventors: Kobayashi, Yuji, Mori, Masakazu, Miyasaka, Koji, Takasu, Kenichi, Sakaki, Kazuyuki
• Granted Patent: US 6,865,484 B2
• Time in Patent Office: Days
• US Class Current: 701/213
• CPC Class Codes: G01S 19/072 Ionosphere corrections
• CPC Class Codes: G01S 19/43 using carrier phase measurements, e.g. kinematic positioning; using long or short baseline interferometry

Abstract

A GPS positioning system that has: at least one mobile station to measure a positional coordinate by receiving radio wave from a satellite; a plurality of fixed stations that have predetermined positional coordinates and receive radio wave from the satellite; and arithmetic processing means, which is connected with at least one mobile station and a plurality of fixed stations via communication, and that transmits correction data suitable for the mobile station to the mobile station based on positioning data transmitted from the mobile station.

Claims

1. A GPS positioning system, comprising:

at least one mobile station to measure a positional coordinate by receiving radio wave from a satellite;

a plurality of fixed stations that have predetermined positional coordinates and receive radio wave from the satellite; and

arithmetic processing means, which is connected with at least one mobile station and a plurality of the fixed stations via communication, and that transmits correction data suitable for the mobile station to the mobile station based on positioning data transmitted from the mobile station.

2. The GPS positioning system according to claim 1, wherein the arithmetic processing means transmits reference positioning data from an appropriate fixed station, which is selected out of a plurality of reference fixed positioning means, based on the positioning data transmitted from the mobile station, together with the correction data.

3. The GPS positioning system according to any one of claim 1 and 2, wherein the correction data is geoid correction data.

4. The GPS positioning system according to any one of claim 1 and 2, wherein the correction data is satellite information data.

5. The GPS positioning system according to any one of claim 1 and 2, wherein the correction data is the atmosphere model correction data.

6. The GPS positioning system according to any one of claims 1 to 5, wherein the mobile station is used for kinematic positioning, in which an antenna and a receiver are movable.

7. A data server for GPS positioning, comprising:

a communication interface that receives positioning data from a mobile station whose positional coordinate is measurable by receiving radio wave from a satellite;

a line interface whose positional coordinate is fixed at a known point, and that receives positioning data from a plurality of fixed stations that receive radio wave from the satellite;

storage means that stores data regarding correction; and

arithmetic processing means that reads out suitable correction data from the storage means and transmits the correction data to the mobile station based on the positioning data received via the communication interface.

8. The data server for GPS positioning according to claim 7, wherein the mobile station is used for kinematic positioning, in which an antenna and a receiver are movable.