RTK-GPS survey system

• US 20070268179A1
• Filed: 05/15/2007
• Published: 11/22/2007
• Est. Priority Date: 05/16/2006
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Topcon, Topcon KK
• Original Assignee: Kabushiki Kaisha Topcon
• Inventors: Yamaguchi, Shigeyuki, Ogawa, Kazuhiro, Takasu, Kenichi
• Granted Patent: US 7,482,974 B2
• Time in Patent Office: Days
• US Class Current: 342/357.410
• CPC Class Codes: G01S 19/04 providing carrier phase data
• CPC Class Codes: G01S 19/07 providing data for correcting measured positioning data, e.g. DGPS [differential GPS] or ionosphere corrections

Abstract

The invention is directed to an RTK-GPS survey system. The survey system includes a server (9) in an IP-VPN communication network 10 for establishing communications between base stations (16 and 17) that transmit correction data and a rover station 15 that receives the correction data. Each satellite positioning device constituting a base station and a rover station includes at least a satellite positioning unit (11) that receives radio waves from artificial satellites, a communication unit (12) that performs a communication between the satellite positioning device, and a control unit (13) that controls the satellite positioning unit (11) and the communication unit (12). The control unit (13) of the rover station 15 can receive interference information registered in the control unit (13) of each satellite positioning device of the base stations (16 and 17), and select a base station that transmits most appropriate correction data among the plural base stations.

Claims

1. An RTK-GPS survey system for performing an RTK-GPS survey comprising:

a server in an IP-VPN communication network for establishing communications between a plurality of satellite positioning devices as base station and a plurality of satellite positioning devices as rover stations, the base station transmitting correction data, the rover station receiving the correction data, wherein;

the satellite positioning devices each includes at least a satellite positioning unit for receiving radio waves from artificial satellites, a communication unit for performing communications between the satellite positioning devices, and a control unit for controlling the satellite positioning unit and the communication unit; and

the control unit of the rover station is capable of receiving interference information registered in the control unit of each satellite positioning device of the base stations, and selecting a base station for transmitting most appropriate correction data among the plurality of base stations.

2. An RTK-GPS survey system for performing an RTK-GPS survey comprising:

a server in an IP-VPN communication network for establishing communications between a plurality of satellite positioning devices as base station and a plurality of satellite positioning devices as rover stations, the base station transmitting correction data, the rover station receiving the correction data, wherein;

the satellite positioning devices each includes at least a satellite positioning unit for receiving radio waves from artificial satellites, a communication unit for performing communications between the satellite positioning devices, and a control unit for controlling the satellite positioning unit and the communication unit; and

the control unit of the base station includes an estimate device for estimating an area in a sky map in which an S/N ratio of a received signal is lower than a reference value, and the control unit of the rover station removes correction data based on the radio waves from artificial satellites existing in the area in the sky map to perform an RTK-GPS processing.