Observations Of Scatter From Surface Reflectors With Doppler Sensitive Probe Signals

Previous analyses of surface scatter from the at-sea KAM11 experiment were made with linear frequency modulated waveforms that emphasized a single slope direction for arrivals in time-varying impulse response estimates. This analysis of Doppler sensitive waveform transmissions, made in the same geometry, resolves additional scatter arrivals with opposite slope. The different Doppler shifts in scatter observations are related to dispersed, naturally occurring, sea surface features that reflect the transmitted waveform to the receiver. The positions of these surface reflectors are estimated from the delay and Doppler shift of the observed arrivals without needing a receiving array with high spatial resolution.