A very simplified model of the radar back scattering coefficient of a sea surface is 0
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A very simplified model of the radar back scattering coefficient of a sea surface is σ0 = A + Bcos 2ψ where ψ is the angle between the wind direction and the radar look azimuth, and A and B are as follows for Ku band scattering at 40° incidence angle, HH-polarisation:
A = 0.8v - 30,
B = 3.5 - 01v
v is the wind speed in ms-1 and σ0 is given by these expressions in dB.
A scatterometer observation measures σ0 values of –22.9 dB and –21.1 dB looking north and east respectively. Find the wind velocity. Is there any ambiguity in your answer? If so, could it be removed by a third observation?
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If the wind speed is vmetres per second and its direction is measured from north to east the data in ...View the full answer
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