12.2. A MMW side looking SAR has the following specifications: radar velocity , elevation angle , operating frequency

, and antenna 3dB beam width .

(a) Calculate E(u)

W'(p, q)

2π

Na

------  

–  p 2π

λ

= ------dsinβcosα

2π

Na

------  

–  q 2π

λ

= ------dsinβsinα

α q p

--  

= tan–1  

15Km

β = 15° L = 5m

τ = 20μs λ = 3.5cm v = 70m ⁄ s β = 35°

f0 = 94GHz θ3dB = 65 the footprint dimensions.

(b) Compute the minimum and maximum ranges. (c)
Compute the Doppler frequency span across the footprint.

(d) Calculate the minimum and maximum PRFs.