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Open AccessArticle

Optimization of Airborne Antenna Geometry for Ocean Surface Scatterometric Measurements

1
Department of Radio Engineering Systems and Scientific-Research Institute “Prognoz”, Saint Petersburg Electrotechnical University, Professora Popova 5, 197376 Saint Petersburg, Russia
2
Institute for Computer Technologies and Information Security, Southern Federal University, Chekhova 2, 347922 Taganrog, Russia
3
Institute of High Frequency Technology, Hamburg University of Technology, Denickestraße 22, 21073 Hamburg, Germany
4
Sochi State University, Sovetskaya 26a, 354000 Sochi, Russia
5
Institute for Radio Engineering Systems and Control, Southern Federal University, Engelsa 1, 347922 Taganrog, Russia
*
Author to whom correspondence should be addressed.
Remote Sens. 2018, 10(10), 1501; https://doi.org/10.3390/rs10101501
Received: 26 July 2018 / Revised: 14 September 2018 / Accepted: 18 September 2018 / Published: 20 September 2018
(This article belongs to the Special Issue Ocean Radar)
We consider different antenna configurations, ranging from simple X-configuration to multi-beam star geometries, for airborne scatterometric measurements of the wind vector near the ocean surface. For all geometries, track-stabilized antenna configurations, as well as horizontal transmitter and receiver polarizations, are considered. The wind vector retrieval algorithm is generalized here for an arbitrary star geometry antenna configuration and tested using the Ku-Band geophysical model function. Using Monte Carlo simulations for the fixed total measurement time, we show explicitly that the relative wind speed estimation accuracy barely depends on the chosen antenna geometry, while the maximum wind direction retrieval error reduces moderately with increasing angular resolution, although at the cost of increased retrieval algorithm computational complexity, thus, limiting online analysis options with onboard equipment. Remarkably, the simplest X-configuration, while the simplest in terms of hardware implementation and computational time, appears an outlier, yielding considerably higher maximum retrieval errors when compared to all other configurations. We believe that our results are useful for the optimization of both hardware and software design for modern airborne scatterometric measurement systems based on tunable antenna arrays especially, those requiring online data processing. View Full-Text
Keywords: airborne scatterometer; multi-beam antenna configuration; star geometry; ocean surface; wind vector; retrieval accuracy airborne scatterometer; multi-beam antenna configuration; star geometry; ocean surface; wind vector; retrieval accuracy
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MDPI and ACS Style

Nekrasov, A.; Khachaturian, A.; Abramov, E.; Popov, D.; Markelov, O.; Obukhovets, V.; Veremyev, V.; Bogachev, M. Optimization of Airborne Antenna Geometry for Ocean Surface Scatterometric Measurements. Remote Sens. 2018, 10, 1501.

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