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Real time self differential global positioning system and method for a moving station in a local area, and terminal global positioning system using the same

  • US 20030083817A1
  • Filed: 04/25/2002
  • Published: 05/01/2003
  • Est. Priority Date: 10/29/2001
  • Status: Active Grant
First Claim
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1. A real time self Differential Global Positioning System (DGPS) for a moving station being operated under a client circumstance with a wireless LAN network and server in a local area, said DGPS system comprises:

  • a private reference station (10) being pre-measured its'"'"' position through accurate measurement, said private reference station (10) including a reference station GPS receiver (11) for detecting position via satellites (20˜

    23), a moving station (30) including a moving station GPS receiver (31) for detecting position via satellites, and a first wireless modem (32) for transmitting RGPS signals contained a position data and satellite time data from said moving station GPS receiver (31), a central control unit (40) including a TGPS receiver (41), a central control server (42) and a second wireless modem (43), said second wireless modem (43) communicating with said first wireless modem (32) in a short distance, said TGPS receiver (41) being interfaced with said reference station GPS receiver (11), received said RGPS signals from said reference station, calculated correction data (X′

    0, Y′

    0) from the received data, and transmitted said calculated correction data to said central control server (42), and said central control server (42) being interfaced with said second wireless modem (43), received said RGPS signals from said moving station, and calculated real position of said moving station by correcting error from the received RGPS signals of position data of moving station.

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