The resolution of ocean wave spectra retrieved by space-borne real aperture radar spectrometer

LIN Wen-ming; DONG Xiao-long

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LIN Wen-ming, DONG Xiao-long. The resolution of ocean wave spectra retrieved by space-borne real aperture radar spectrometer[J]. Haiyang Xuebao, 2010, 32(5): 9-16.

Citation:

LIN Wen-ming, DONG Xiao-long. The resolution of ocean wave spectra retrieved by space-borne real aperture radar spectrometer[J]. Haiyang Xuebao, 2010, 32(5): 9-16.

LIN Wen-ming, DONG Xiao-long. The resolution of ocean wave spectra retrieved by space-borne real aperture radar spectrometer[J]. Haiyang Xuebao, 2010, 32(5): 9-16.

Citation:

LIN Wen-ming, DONG Xiao-long. The resolution of ocean wave spectra retrieved by space-borne real aperture radar spectrometer[J]. Haiyang Xuebao, 2010, 32(5): 9-16.

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The resolution of ocean wave spectra retrieved by space-borne real aperture radar spectrometer

LIN Wen-ming¹,
DONG Xiao-long²

1.
Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing 100190, China; Graduate School, Chinese Academy of Sciences, Beijing 100049, China
2.
Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing 100190, China

Received Date: 2010-05-07

Abstract

Abstract

The measurement principle of a space-borne real aperture radar spectrometer and the error analysis model are introdued. The analysis of the wavelength resolution and directional resolution is presented, based on the SWIM instrument, which is proposed by Hauser D et al. To reduce the fluctuation of retrieved spectra, it is proposed to average ten adjacent independent samples in the time domain and eight in the wavenumber domain, respectively, during the data processing. And for achieving the directional resolution better than 20°, the largest number of integrated subperiod is three, seven and ten for the instrument operated in three different modes, respectively. Two methods, namely, analytical process and simulation process, are adopted to analyze the energy error of retrieved wave spectra by SWIM operated at Mode 2. The results of the two methods are in agreement, which shows that the energy error is less than 20% for certain wave conditions.
- radar spectrometer,
- ocean wave spectra,
- resolution quality,
- energy error

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References(10)

References

HAUSER D, SOUSSI E, THOUVENOT E, et al. SWIMSAT: a real-aperture radar to measure directional spectra of ocean waves from space-main characteristics and performance simulation [J]. Journal of Atmospheric and Oceanic Technology, 2001, 18(3): 421—437.

ALPERS W R, ROSS D B, RUFENACH C L. On the detectability of ocean surface waves by real and synthetic aperture radar [J]. Journal of Geophysical Research, 1981, 86(C7): 6481—6498.

JACKSON F C, WALTON T W, BAKER P L. Aircraft and satellite measurement of ocean wave directional spectra using scanning beam microwave radars[J].Journal of Geophysical Research,1985,90 (C1):987—1004.

JACKSON F C,WALTON T W.A comparison of in situ and airborne radar observations of ocean wave directionality[J].Journal of Geophysical Research, 1985,90 (C1):1005—1018.

TISON C, AMIOT T, BOURBIER J, et al. Directional wave spectrum estimation by SWIM instrument on CFOSAT . Earth Observation- Origins to Applications: IGARSS'2009 Proceedings, Cape Town, 2009(V):312—315.

ENJOLRAS V, REY L, CROS L, et al. SWIM: a state of art multi-incidence beams Ku-band waves scatterometer to go beyond current radar systems . Earth Observation—Origins to Applications: IGARSS'2009 Proceedings, Cape Town, 2009(Ⅴ):316—319.

PIERSON W J, MOSKOWITZ L. A proposed spectral form for fully developed wind sea based on the similarity theory of S A Kitaigorodskii[J].Journal of Geophysical Research, 1964, 69(24):5181—5190.

DURDEN S L, VESECKY J F. A physical radar cross-section model for a wind-driven sea with swell[J].IEEE Journal of Oceanic Engineering,1985, 10(4):445—451.

文圣常,宇宙文.海浪理论与计算原理[M].北京: 科学出版社, 1984:142—194, 276—291.

LIN Wen-ming,DONG Xiao-long, ZHOU Yu-chi, et al. Simulation and optimization of the performance of space-borne radar ocean wave spectrometer . Earth Observation— Origins to Applications: IGARSS'2009 Proceedings Cape Town, 2009(III):793—796.

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