Second Order Bragg Scattering in a SAR,
MITRE CORP MCLEAN VA
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Why might we see narrow lines from second order Bragg scattering If we accept the notion that the short-wave components of the ship wake are slightly distorted versions of the Kelvin wake, then there is the possibility of scattering, at a given place, from a spectrum of waves. The Dabob Bay data indicates that there is little energy in the wake having wave numbers capable of producing first-order Bragg scattering of L-band radar. This could be taken as explaining why even narrower V wakes are not observed. But the observations do show considerable enhancement of waves of twice the Bragg wavelength at the angle where a SAR wake is observed.
- Active and Passive Radar Detection and Equipment
- Radiofrequency Wave Propagation