Applications of an Integrated GPS Receiver for Reflected GPS Signals L1/L2 Observation Techniques with River's Stream Flow and Water Altimetry

Lie-Chung Shen, Jyh-Ching Juang, Ching-Lang Tsai, Ching-Liang Tseng, and Chan-Chang Chang

Abstract:	The paper is intended to describe relationships of reflected GPS signals and environmental effect factors. An altitude iteration loop into least-squares searching for receiver position was modified and enhanced by giving 4 or more pseudoranges and ephemeredes and zooming on the plot to detect the search pattern 1. The software is developed using Matlab tools, which can display results of the reflected surface area altitude in real time. For the reflected signal application, it has been proven that a GPS receiver cannot smoothly detect reflected signals because under the underground base receiver system cannot smoothly receive the reflected signals which are weak and discontinuously reflected. This problem negatively impacts and reduces application of reflected signals. At mean LHCP/RHCP receiver positions with solution of instantaneous ambiguity by condition, the values of moving position relative of mean receiver position by altitude, north and east with 1s latency are among –0.5 m and 0.5 m with L1/L2 SNR and atmospheric delays. The Design of an integrated receiver system permits smooth reception of the signals reflected by the water or ground. A rapid resolution altimetry and stream flow method was developed by using surface elevations spectrum with the elevation angle and line of sight theory in the reflecting geometry and atmospheric corrections with ambiguity solution. A estimation of stream flow formula method was developed by using 10 Hz L1/L2 observations of LHCP/RHCP Receiver and Instantaneous Troposphere delay derived method.
Published in:	Proceedings of the 63rd Annual Meeting of The Institute of Navigation (2007) April 23 - 25, 2007 Royal Sonesta Hotel Cambridge, MA
Pages:	340 - 345
Cite this article:	Shen, Lie-Chung, Juang, Jyh-Ching, Tsai, Ching-Lang, Tseng, Ching-Liang, Chang, Chan-Chang, "Applications of an Integrated GPS Receiver for Reflected GPS Signals L1/L2 Observation Techniques with River's Stream Flow and Water Altimetry," Proceedings of the 63rd Annual Meeting of The Institute of Navigation (2007), Cambridge, MA, April 2007, pp. 340-345.
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