Doppler spectra of medium grazing angle sea clutter; part 1: characterisation

作者：Watts Simon^*; Rosenberg Luke; Bocquet Stephen; Ritchie Matthew

来源：IET Radar Sonar and Navigation, 2016, 10(1): 24-31.

DOI：10.1049/iet-rsn.2015.0148

• Doppler radar
• Doppler shift
• Doppler spectra
• medium grazing angle sea clutter
• X-band radar sea clutter
• airborne platform
• Doppler shift
• local spectrum intensity
• spatial variability
• temporal variability
• bimodal behaviour
• breaking waves

This study is concerned with the characterisation of Doppler spectra from high range resolution X-band radar sea clutter observed from an airborne platform over the range of grazing angles, 15 degrees to 45 degrees. It is observed that when looking up or down wind there is a strong correlation between mean Doppler shift and local spectrum intensity. When combined with random fluctuations of spectrum width, these characteristics give the spectra a temporal and spatial variability. This behaviour has previously been observed in low grazing angle data and these results confirm the wider applicability of the models developed using that data. The modelling method is also extended here to capture the bimodal behaviour observed with high intensity returns from breaking waves looking up or down-wind.

• 出版日期2016-1