Scattering amplitude data for several objects:

The bounding box is (-1,-1) to (1,1) m, and the frequency is 300 MHz.
  1. scat1_sa.dat
  2. scat2_sa.dat
  3. scat3_sa.dat
  4. scat4_sa.dat
The file format is:
Incident angle (degrees), Scattered angle, Real part of scattering amplitude, Imaginary part
(exp(j omega t) time convention)

To load the files, use

sa = load('scat1_sa.dat');
F = sa(:,3)+j*sa(:,4);
NA = sqrt(length(F));
F = reshape(F,NA,NA); % incident angles along columns, scattered angles along rows

Papers on the regularized sampling method:

D. Colton, et al., A regularized sampling method..., SIAM J. Sci. Comp., vol. 21, pp. 2316-2330, 2000.
N. Shelton, et al., Behavior of the regularized sampling method..., PIER, vol. 38, pp. 29-45, 2002.
A. Lantermann, et al., A comparison of the Colton-Kirsch inverse scattering methods with linearized tomographic inverse scattering", Inverse Problems, vol. 17, pp. 1797-1816, 2002.