Vehicle Positioning by Network-Based RTK-GPS Using Area Correction Parameter (FKP) via TV Wave in Japan

Chunming Fan, Nobuaki Kubo, Koji Sasano, Hiroyuki Hasegawa, and Hiromune Namie

Abstract:	The precision of a few centimeters can be easily obtained by RTK-GPS positioning, as the range from a user GPS antenna to the satellite is determined by the phase measurement of the carrier waves. It is necessary to provide the correction data included the carrier phase data from a reference station located at a known position, to a user receiver. In the present paper, ASC (TV Audio Sub-carrier Channel) of the television wave is used for transmitting the FKP data to test the network-based RTK-GPS. The carrier phase data of every second from GPS receivers at four reference stations are transmitted to the Data Station via the Internet and processed to the FKP data to be transmitted to the user stations. The TV broadcast can be disseminated the data for the wider area and the great many users simultaneously. The authors investigated the network-based RTK-GPS positioning at a fixed point in the Tokyo University of Marine Science and Technology, located outside the reference station network area. The 2drms of the horizontal positions of 2.95 cm by ASC is comparable to the 3.14 cm simultaneously obtained by the public phone link. They also tried the positioning on running vehicles of a driving car in Tokyo urban area and a sailing boat in Tokyo Bay. It is shown in the former that the fixed positions were available, though the number of satellites varied frequently by the blocking of tall buildings. In the latter, the positions, fixed continuously with the middle range baseline by the data of FKP, agreed well with those fixed by traditional RTK-GPS. The results prove that the ASC is capable to be the future potential medium for supporting the precise real time GPS positioning service.
Published in:	Proceedings of the 2004 National Technical Meeting of The Institute of Navigation January 26 - 28, 2004 The Catamaran Resort Hotel San Diego, CA
Pages:	475 - 482
Cite this article:	Fan, Chunming, Kubo, Nobuaki, Sasano, Koji, Hasegawa, Hiroyuki, Namie, Hiromune, "Vehicle Positioning by Network-Based RTK-GPS Using Area Correction Parameter (FKP) via TV Wave in Japan," Proceedings of the 2004 National Technical Meeting of The Institute of Navigation, San Diego, CA, January 2004, pp. 475-482.
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