Measuring the Directional Ocean Spectrum from Simulated Bistatic HF Radar Data
1
School of Mathematics and Statistics, University of Sheffield, Sheffield S10 2TN, UK
2
Seaview Sensing Ltd., Sheffield S10 3GR, UK
*
Author to whom correspondence should be addressed.
†
These authors contributed equally to this work.
Remote Sens. 2020, 12(2), 313; https://doi.org/10.3390/rs12020313
Received: 19 December 2019
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Revised: 9 January 2020
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Accepted: 14 January 2020
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Published: 18 January 2020
(This article belongs to the Special Issue Bistatic HF Radar)
HF radars are becoming important components of coastal operational monitoring systems particularly for currents and mostly using monostatic radar systems where the transmit and receive antennas are colocated. A bistatic configuration, where the transmit antenna is separated from the receive antennas, offers some advantages and has been used for current measurement. Currents are measured using the Doppler shift from ocean waves which are Bragg-matched to the radio signal. Obtaining a wave measurement is more complicated. In this paper, the theoretical basis for bistatic wave measurement with a phased-array HF radar is reviewed and clarified. Simulations of monostatic and bistatic radar data have been made using wave models and wave spectral data. The Seaview monostatic inversion method for waves, currents and winds has been modified to allow for a bistatic configuration and has been applied to the simulated data for two receive sites. Comparisons of current and wave parameters and of wave spectra are presented. The results are encouraging, although the monostatic results are more accurate. Large bistatic angles seem to reduce the accuracy of the derived oceanographic measurements, although directional spectra match well over most of the frequency range.
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Keywords:
HF radar; remote sensing; inversion; radar cross section; bistatic radar; directional wave spectrum
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MDPI and ACS Style
Hardman, R.L.; Wyatt, L.R.; Engleback, C.C. Measuring the Directional Ocean Spectrum from Simulated Bistatic HF Radar Data. Remote Sens. 2020, 12, 313. https://doi.org/10.3390/rs12020313
AMA Style
Hardman RL, Wyatt LR, Engleback CC. Measuring the Directional Ocean Spectrum from Simulated Bistatic HF Radar Data. Remote Sensing. 2020; 12(2):313. https://doi.org/10.3390/rs12020313
Chicago/Turabian StyleHardman, Rachael L., Lucy R. Wyatt, and Charles C. Engleback. 2020. "Measuring the Directional Ocean Spectrum from Simulated Bistatic HF Radar Data" Remote Sensing 12, no. 2: 313. https://doi.org/10.3390/rs12020313
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