Elements of Remote Sensing

For C band Synthetic Aperture Radar (SAR) with Doppler band width of 1300 Hz, the coherence length lcoh is:

A 130 km

B 230 km

C 250 km

D 500 km

ANS:B - 230 km

Speed = 3*10^8m,
frequency= 1300hz,
wavelenght = speed / frequency,
(3*10^8)/(1300)=230769m ~ 230km.

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