On the Reliability of Surface Current Measurements by X-band Marine Radar


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Volker.Strass [ at ] awi.de

Abstract

Real-time quality-controlled surface current data derived from X-Band marine radar (MR) measurements were evaluated to estimate their operational reliability. The presented data were acquired by the standard commercial o�-the-shelf MR-based sigma s6 WaMoS® II (WaMoS® II) deployed onboard the German Research vessel Polarstern. The measurement reliability is specified by an IQ value obtained by the WaMoS® II real-time quality control (rtQC). Data which pass the rtQC without objection are assumed to be reliable. For these data sets accuracy and correlation with corresponding vessel-mounted acoustic Doppler current profiler (ADCP) measurements are determined. To reduce potential misinterpretation due to short-term oceanic variability/turbulences, the evaluation of the WaMoS® II accuracy was carried out based on sliding means over 20 min of the reliable data only. The associated standard deviation �WaMoS = 0.02 m/s of the meanWaMoS® II measurements reflect a high precision of the measurement and the successful rtQC during di�erent wave, current and weather conditions. The direct comparison of 7272 WaMoS® II/ADCP northward and eastward velocity data pairs yield a correlation of r � 0.94, with jbiasDj � 0.06 m/s and �S = 0.05 m/s. This confirms that the MR-based surface current measurements are accurate and reliable.



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ISI/Scopus peer-reviewed
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Published
Eprint ID
49633
DOI 10.3390/rs11091030

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Hessner, K. G. , El Naggar, S. , von Appen, W. J. and Strass, V. H. (2019): On the Reliability of Surface Current Measurements by X-band Marine Radar , Remote Sensing, 11 (9), pp. 1-18 . doi: 10.3390/rs11091030


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