Wave Measurement System Using GPS Software Receiver and Arrayed Antenna

Shigeyuki Okuda, Yasuo Arai, Cui Jian, Nobuyoshi Kouguchi

Abstract:	The purpose of this study is to obtain oceanic wave information using GPS signal reflected from sea surface. In the past study, using GPS signal reflected from sea surface, it was confirmed to obtain wave height information by carrying out numerical simulation and basic experiment on land and to obtain wavelength information by numerical simulation. Recently, a GPS software receiver that is able to process received GPS signal by software programming using PC was developed, and it becomes to be possible to carry out experimental validation using GPS software receiver. Additionally, narrow down antenna beam width was able to be realized by constituting arrayed antenna. Accordingly, we designed and made new GPS arrayed antenna, and we experimentally and analytically evaluated the antenna directional pattern and verified that the arrayed antenna and the software GPS receiver was able to obtain wavelength information of oceanic wave by numerical simulation. Antenna system to receive GPS signal reflected from sea surface is the arrayed antenna which is consists of 16 elements of patch antenna for LHCP in horizontal direction in series. The composite directional pattern of the arrayed antenna takes the shape of very narrow fan beam facing the front side of the arrayed antenna. A combination with the arrayed antenna and the GPS software receiver becomes to be able to carry out some validation experiments to obtain wave information by GPS signal reflected from sea surface. Finally in this paper, we made a prototype of arrayed antenna to receive GPS signal reflected from sea surface by way of collection for wave information of oceanic wave, and we showed that it was possible to be able to estimate wavelength of wave information in validation experiment by carrying out numeric simulation using the directional pattern of proposed antenna array. For near future, we will be able to carry out actual and enough experiment for novel wave information system by a combination of the arrayed antenna and the GPS software receiver.
Published in:	Proceedings of the 2009 International Technical Meeting of The Institute of Navigation January 26 - 28, 2009 Disney's Paradise Pier Hotel Anaheim, CA
Pages:	864 - 868
Cite this article:	Okuda, Shigeyuki, Arai, Yasuo, Jian, Cui, Kouguchi, Nobuyoshi, "Wave Measurement System Using GPS Software Receiver and Arrayed Antenna," Proceedings of the 2009 International Technical Meeting of The Institute of Navigation, Anaheim, CA, January 2009, pp. 864-868.
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