POWERGPS: A New Family of High Precision GPS Products

Hiroshi Okamoto, Kazunori Miyahara, Ron Hatch and Terry Sharpe

Abstract:	A new family of high performance GPS receiver products has been introduced by Sokkia Corporation of Tokyo, Japan. This family of products, named the POWERGPS Professional Measurement System is designed for use in applications requiring the highest accuracy and precision: static and kinematic surveying, real-time kinematic and GIS. This paper provides an overview of the POWERGPS product family with brief descriptions of the various models, their capabilities and target applications. Emphasis is placed on the innovative features of the core receiver technology, which enable the generation of GPS measurements of the highest quality. These features include: High sampling rate (8OMhz) and 3-bit analog to digital conversion of the down-converted GPS signal to allow precise code phase edge resoltion. Proprietary multipath rejection techniques, which exploit the high sampling rate and precise digital sample resolution to yield pseudorange measurements of the highest quality. Proprietary cross-correlation algorithms which yield higher signal to noise ratios when tracking AS coded signals. A flexible digital signal processing channel architecture which allows major functional blocks within the receiver to be assigned to track various combinations of the GPS signal as needed. Sample results are presented illustrating the levels of performance achieved.
Published in:	Proceedings of the 1998 National Technical Meeting of The Institute of Navigation January 21 - 23, 1998 Westin Long Beach Hotel Long Beach, CA
Pages:	327 - 332
Cite this article:	Okamoto, Hiroshi, Miyahara, Kazunori, Hatch, Ron, Sharpe, Terry, "POWERGPS: A New Family of High Precision GPS Products," Proceedings of the 1998 National Technical Meeting of The Institute of Navigation, Long Beach, CA, January 1998, pp. 327-332.
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