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GPS Multipath Fade Measurements to Determine L-Band Ground Reflectivity PropertiesIn personal satellite communications, especially when the line-of-sight is clear, ground specular reflected signals along with direct signals are received by low gain, almost omni-directional subscriber antennas. A six-channel, C/A code processing, GPS receiver with an almost omni-directional patch antenna was used to take measurements over three types of ground to characterize 1.575 GHz specular ground reflections and ground dielectric properties. Fade measurements were taken over grass, asphalt, and lake water surfaces by placing the antenna in a vertical position at a fixed height from the ground. Electrical characteristics (conductivity and dielectric constant) of these surfaces (grass, asphalt, lake water) were obtained by matching computer simulations to the experimental results.
Document ID
19980023110
Document Type
Conference Paper
Authors
Kavak, Adnan
(Texas Univ. Austin, TX United States)
Xu, Guang-Han
(Texas Univ. Austin, TX United States)
Vogel, Wolfhard J.
(Texas Univ. Austin, TX United States)
Date Acquired
August 17, 2013
Publication Date
September 1, 1996
Publication Information
Publication: Proceedings of the Twentieth NASA Propagation Experimenters Meeting (NAPEX XX) and the Advanced Communications Technology Satellite (ACTS) Propagation Studies Miniworkshop
Subject Category
Communications And Radar
Funding Number(s)
CONTRACT_GRANT: JPL-956520
CONTRACT_GRANT: N00014-95-I-0638
CONTRACT_GRANT: NSF MIP-95-02695
CONTRACT_GRANT: F49620-95-C-0045
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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IDRelationTitle19980023098Analytic PrimaryProceedings of the Twentieth NASA Propagation Experimenters Meeting (NAPEX XX) and the Advanced Communications Technology Satellite (ACTS) Propagation Studies Miniworkshop
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