(a) Bias of refraction and (b) bias of scattering versus refraction angle. The discrete points represent the experimental results and the solid lines are the theoretical predictions from Eq. (8). Circles, triangles, and squares correspond, respectively, to three different scattering signals: 5 μrad, 10 μrad, and 15 μrad. (c) Bias of refraction and (d) bias of scattering versus scattering signal. Circles, triangles, and squares correspond, respectively, to three different refraction angles: 5 μrad, 10 μrad, and 15 μrad.