Characterisation of High Grazing Angle X-band Sea-clutter Doppler Spectra
DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) INTELLIGENCE SURVEILLANCE AND RECONNAISSANCE DIV
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Collection of radar sea-clutter for research purposes is typically performed from a clifftop looking out to sea as it is relatively simple and inexpensive. This constrains the radar look direction with respect to the wind and limits the grazing angle. To improve our understanding at high grazing angles in the range 15 deg to 45 deg, the DSTOs Ingara airborne X-band fully polarimetric radar has been used to collect 12 days worth of sea-clutter data. It has previously been shown that Walkers mean Doppler spectrum model is not suitable at these grazing angles and hence a new two component model is proposed which captures both the slow Bragg component and the fast non-Bragg component of the radar backscatter. A temporal decorrelation model is then presented which can be used to provide realistic performance prediction modelling.
- Theoretical Mathematics
- Active and Passive Radar Detection and Equipment
- Radiofrequency Wave Propagation