Combined μ-responses of a particle instrument, consisting of four viewing directions for various selected magnetic field vectors. Left panels of (a)–(d): magnetic field vector (black arrow) in relation to the center axis of the four particle telescopes (color-coded arrows). The color-coded cones represent the physical opening cone of each telescope. Right panels of (a)–(d): corresponding μ-response depicted as a color-coded histogram for each telescope. The colored dashed lines represent the respective nominal μ-values. The magnetic field vector is (a) located slightly outside the blue cone, (b) perpendicular to the center axis of each of the four telescopes, (c) located directly in between the blue and red colored center axes, and (d) pointing along the center axis of the red colored telescope.