Radon projections and Fourier domain representations of two synthetic spatial patterns of A_p(x, y). Each row shows, from left to right, the spatial map, its Radon sinogram, the log-scaled Fourier amplitude, and the Fourier phase. The white and black lines indicate the information accessible from a transit with θ_i = 30^∘ and θ_e = 150^∘, corresponding to an impact parameter of b ∼ 0.5. All other regions in the Radon domain and in the Fourier domain are inaccessible in the Radon transform limit.