The Influence of Surface Oil on C-and Ku-Band Ocean Backscatter

Singh, Kumar Hemant; Gray, Alistair; Hawkins, Richard A.; O’Neil, R. A.

doi:10.1109/tgrs.1986.289622

Cited by 44 publications

(32 citation statements)

References 8 publications

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“…Figure 4 shows K r as function of the incidence angle for moderate (curve 1) and small (2) roughness of the small-scale spectrum. In our case, K r means the ratio between the backscatter cross sections for two surfaces which have a small roughness, as is indicated above, and a large-scale roughness with γ = 0.32 (curve 1) and 0.1 (2). It is seen that K r can reach values up to 20 dB depending on the slope value.…”

Section: Numerical Resultsmentioning

confidence: 80%

“…However, most measurements of the radar backscatter from slicks have been interpreted in terms of the small perturbation theory (see, for example, [5]). As a result, the experimental observations not always agree with the theoretical conclusions [2].…”

Section: Introductionmentioning

confidence: 73%

“…When the short-wave range of the electromagnetic waves is used for remote sensing of the sea surface, it is possible to simplify (6) by taking into account that the inequality |r − s|K χ x holds for a wide range of variations of r and s, except for the small range near vertical incidence. Besides, we suppose that χ x K/(χ z γ) 2 1 where γ = h 2 /l 2 is the slope of the large-scale roughness. Then one can write the expression for the radar scattering cross section as…”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…The ability to detect and monitor oil spills at sea is becoming increasingly important, because of the threats posed by such pollution to marine operations and wildlife [1,2]. In recent years, remotesensing techniques and corresponding processing techniques have been developed for this purpose.…”

Section: Introductionmentioning

confidence: 99%

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Model of Electromagnetic Wave Scattering FROM Sea Surface with and without Oil Slicks

Timchenko¹,

Serebryannikov²,

Schuenemann³

2002

PIER

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Abstract-The problem of scattering from sea surface covered by oil films is investigated by using a composite random rough surface model. A model is developed which extends the range of validity beyond the small perturbation theory. A general expression for the scattering cross section is obtained taking into account a modulation of the rough surface by long surface waves. A numerical study for the radar scattering cross section is provided in order to investigate the influence of the different ranges of the rough surface spectrum on the backscattering depression. For the case of backscattering, the contrast of radar signals scattered from a slick-free and a slick-covered surface is evaluated. The study is also carried through for two-frequency probing. A possibility to explain the mechanism of the depression of backscattering is discussed. The results of this study demonstrate the importance of the improved model which takes into account the entire spectrum of the sea surface roughness for the description of scattering from an ocean surface with and without oil slicks.

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Section: Numerical Resultsmentioning

confidence: 80%

Section: Introductionmentioning

confidence: 73%

Section: Theoretical Backgroundmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Model of Electromagnetic Wave Scattering FROM Sea Surface with and without Oil Slicks

Timchenko¹,

Serebryannikov²,

Schuenemann³

2002

PIER

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“…Scatterometer systems have been tested for the determination of liquid versus ice content in precipitating clouds, 10 ocean vector winds measurements for hurricane prediction, 11 dry snowpack measurements, 12 crop canopy yields, 13 and oil spill classification. 14 The first two applications are spaceborne and likely out of scope for airborne or unmanned aerial systems.…”

Section: Ku-band Earth Monitoring Assessmentmentioning

confidence: 99%

Initial assessment of an airborne Ku-band polarimetric SAR.

Raynal¹,

Doerry²

2013

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Polarimetric synthetic aperture radar (SAR) has been used for a variety of dual-use research applications since the 1940's. By measuring the direction of the electric field vector from radar echoes, polarimetry may enhance an analyst's understanding of scattering effects for both earth monitoring and tactical surveillance missions. Polarimetry may provide insight into surface types, materials, or orientations for natural and man-made targets. Polarimetric measurements may also be used to enhance the contrast between scattering surfaces such as man-made objects and their surroundings. This report represents an initial assessment of the utility of, and applications for, polarimetric SAR at Ku-band for airborne or unmanned aerial systems. 4 ACKNOWLEDGMENTSThe authors would like to thank the various organizations, radar systems, and individuals whose work is exhibited in this report for illustrative purposes.The first author would like to express her gratitude to Billy C. Brock and Douglas L. Bickel from Sandia National Laboratories for their willing mentorship and generous sharing of their time for this report. We are grateful for the informative discussions with Billy regarding polarimetric applications, specifically those related to coherent change detection and crevasse monitoring. We further are thankful for discussions with Doug related to the relevance of maritime applications for ship detection and Ku-band scatterometers to our study.

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