Time-dependent modulation by the inner heliosphere forces, f_F, of the ISD flux that reaches Ulysses compared to the ISD flux at the termination shock, for four sets of parameters, (β, Q/m), corresponding to particle sizes of a ≈ 2.30 μm (dashed grey line), a ≈ 4.07 × 10⁻¹ μm (dash-dotted navy line), a ≈ 1.67 × 10⁻¹ μm (dotted red line), and a ≈ 5.15 × 10⁻² μm (solid blue line): daily values in a moving average of 31 d. The shaded areas correspond to the perihelion crossings.