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Determination of Significant Wave Heights Using Damping Coefficients of Attenuated GNSS SNR Data from Static and Kinematic Observations

1
Department of Geoinformation, Jade University of Applied Sciences, 26121 Oldenburg, Germany
2
Institute of Navigation, University of Stuttgart, 70174 Stuttgart, Germany
*
Author to whom correspondence should be addressed.
Remote Sens. 2019, 11(4), 409; https://doi.org/10.3390/rs11040409
Received: 31 January 2019 / Revised: 13 February 2019 / Accepted: 15 February 2019 / Published: 17 February 2019
(This article belongs to the Section Ocean Remote Sensing)
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Abstract

Currently, GNSS reflectometry based on the signal-to-noise ratio (SNR) has become an established tool in ocean remote sensing. Here, the distance between an antenna and the water surface is measured by analyzing the oscillation of the SNR observation. Due to the antenna gain pattern, this oscillation is more pronounced for satellite signals coming from low elevation angles. Additionally, the sea surface roughness is related to the attenuation of the SNR oscillation. Hence, the significant wave height (SWH) can be estimated by analyzing the SNR signal. In this work, a method is presented with which the SWH can be calculated from the attenuation’s damping coefficient of the SNR observations measured with surface-based receivers. The method’s usability is demonstrated using data from a static antenna operated in the German Bight and with data from a ship-based antenna. The estimated SWH values were validated against numerical wave model data. For both experiments, a high correlation was found. View Full-Text
Keywords: GNSS reflectometry; GNSS SNR; interference pattern technique; damping coefficient; significant wave height; ship measurement GNSS reflectometry; GNSS SNR; interference pattern technique; damping coefficient; significant wave height; ship measurement
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Roggenbuck, O.; Reinking, J.; Lambertus, T. Determination of Significant Wave Heights Using Damping Coefficients of Attenuated GNSS SNR Data from Static and Kinematic Observations. Remote Sens. 2019, 11, 409.

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