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ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa
CURRENT PROBLEMS IN REMOTE SENSING OF THE EARTH FROM SPACE

  

Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2017, Vol. 14, No. 7, pp. 250-266

Comparison of coastal currents measured by HF and X-band radars with ADCP and drifter data at the IO RAS hydrophysical test site in the Black Sea

A.G. Zatsepin 1 , V.V. Gorbatskyi 2 , S.A. Myslenkov 3, 1 , N.N. Shpilev 2 , D.I. Dudko 2 , D.V. Ivonin 1 , K.P. Silvestrova 1 , V.I. Baranov 1 , V.A. Telegin 4, 1 , S.B. Kuklev 1 
1 P.P. Shirshov Institute of Oceanology RAS, Moscow, Russia
2 Krylov State Research Center, Saint Petersburg, Russia
3 M.V. Lomonosov Moscow State University, Moscow, Russia
4 Institute of Terrestrial Magnetism and Radio Wave Propagation RAS, Moscow, Russia
Accepted: 03.11.2017
DOI: 10.21046/2070-7401-2017-14-7-250-266
Results of complex sea current velocity measurements are presented. Experiments were held on the hydrophysical test site of the Institute of Oceanology RAS (IO RAS) in the Black Sea (near Gelendzhik) in September-October 2015 and in April 2016. Current velocity was measured by high frequency (HF) radar Sea Sonde (25 MHz), X-band radar (9.7 GHz), two moored ADCPs at 22 m and 85 m, towed bottom-tracked ADCP and also Lagrangian drifters. Drifter underwater sails (0.5–1 m) could be located at different depths. The aims of the experiments were: 1) testing of different radar locations; 2) complex measurements of sea currents; 3) cross-verification of all available equipment. Agreement of all the measurement data were observed in conditions of intensive currents (and eddies, when current is quasi stable) without local wind forcing. The difference between the results was significant in case of variable vertical profile and high spatial and temporal variability of the current. Such difference is due to diverse range of measurement depths and averaging intervals. Also, a good result was obtained by comparing the Sea Sonde radar data with drifters data: correlation coefficient was 0.88 and the RMSE was 9.8 cm/s. The paper presents main advantages and disadvantages of used measurement equipment.
Keywords: Black Sea, coastal currents, submesoscsale eddies, HF radar, X-band radar, ADCP, drifters
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