Polarimetric analysis of maritime SAR data collected with the DSTO ingara X-Band radar

Crisp, David J.; Stacy, N.J.S.; Hudson, D.A.; Pincus, P.; Goh, Alvin S.

doi:10.1109/igarss.2007.4423689

Cited by 20 publications

(14 citation statements)

References 3 publications

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“…These plots, like the others below have been edited to remove bad data points caused by saturation of the ADCs in the radar receiver. The ocean results are as expected and conform to know trends [4]. Note though that the cross wind trough at azimuth angle 290 • is significantly deeper that at 100 • .…”

Section: Co-variance Matrix Variation With Azimuthsupporting

confidence: 84%

Comparison of ship detectors for polarimetric SAR imagery

Crisp

Keevers

2010

Oceans'10 Ieee Sydney

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This paper examines the benefits of using fully polarimetric SAR imagery for ship detection. There are three related aspects to the work. First, RadarSat-2 quad-pol stripmap imagery is used to compare the performance of various ship detection algorithms/methods. The comparison is based on the use of ROC curves. Second, circular spotlight SAR imagery is used to examine how detector performance varies with the azimuth angle. Owing to the small number of available ship samples, this analysis has limitations. Third, again using the circular spotlight SAR imagery, the variation, with respect to azimuth angle, of the elements of the polarimetric covariance matrix of both the ship and the ocean are analysed. The results are as follows. Using the stripmap imagery, it is found that exploiting both polarimetry and spatial correlations greatly improves detection performance. Using the circular spotlight imagery, it is found that detection performance is variable with respect to azimuth angle and trends are hard to discern. Moreover, the performance of the Pauli double bounce detector is generally poor. It is conjectured that ship pitching motion degrades the polarimetric backscatter response in the circular spotlight imagery. Finally, the covariance matrix analysis confirms known trends for the ocean backscatter. The implication of these trends is that the polarimetric covariance matrix is sensitive to changes in azimuth angle and hence detectors based on them are also. The data indicate the extent to which this is the case.

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Section: Co-variance Matrix Variation With Azimuthsupporting

confidence: 84%

Comparison of ship detectors for polarimetric SAR imagery

Crisp

Keevers

2010

Oceans'10 Ieee Sydney

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“…Other studies [6,7,39,40] have looked at characterising the polarimetric signature of high grazing angle sea-clutter using the Cloude-Pottier 'entropy-alpha' decomposition. Quantitative analysis of a wooden fishing vessel [40] indicated that the HH is the best polarisation for detecting targets.…”

Section: Doppler Spectramentioning

confidence: 99%

A review of high grazing angle sea-clutter

Watts

Rosenberg

2013

2013 International Conference on Radar

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This paper reviews the published literature on the characteristics of mono-static radar sea-clutter observed with high grazing angles (typically above about 10°). To date, most of the analysis and modelling of sea-clutter has been undertaken at low grazing angles with the main application being for surface and airborne maritime radars. The paper identifies some of the data sets that have been collected and the empirical models that have been developed from them for the normalised radar crosssection. The amplitude statistics and Doppler spectra of high grazing angle clutter are reviewed and the implications for radar design and target detection are discussed.

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“…This radar has been deployed in a number of trials, and subsequent analysis of the resultant clutter and detection performance has been documented extensively [25][26][27][28].…”

Section: Ingara Radar and Cluttermentioning

confidence: 99%

Development of an improved minimum order statistic detection process for Pareto distributed clutter

Weinberg

2015

IET Radar, Sonar & Navigation

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A simple modification of a minimum-based constant false alarm rate detector for Pareto clutter models is examined in this study. This has been motivated by the need to develop improved detection processes to operate in high grazing angle clutter as exemplified by returns acquired from the Defence Science and Technology Organisation's Ingara radar. A minimum-based detector has the greatest resilience to clutter transitions and interfering targets. However, it has been shown recently that a minimum-based detector for the Pareto environment has a tendency to saturate. Using a simple transformation, progress is made towards the development of a useful incoherent detection scheme. Its performance is then analysed in both synthetic and real clutter.

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Polarimetric analysis of maritime SAR data collected with the DSTO ingara X-Band radar

Cited by 20 publications

References 3 publications

Comparison of ship detectors for polarimetric SAR imagery

Comparison of ship detectors for polarimetric SAR imagery

A review of high grazing angle sea-clutter

Development of an improved minimum order statistic detection process for Pareto distributed clutter

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