Fig. 1. Illustration for the method of measuring the observing angle of a pulsar based on SMXIC.

Fig. 2. Experimental scheme for the angle measurement based on SMXIC. (a) Schematic setup for the X-ray experiment. (b) Example of the intensity distribution pair I_r(x_r) and I_t(x_t) recorded in the experiment. (c) Process of the scanning measurement.

Fig. 3. Experimental results for γ = 0. The dots are the intensity correlation data obtained in the experiment. The solid and dashed lines are the experimental fitting curve and the theoretical curve, respectively. The peak position of the experimental fitting curve is marked by Δx_p.

Fig. 4. Experimental results of six different observing angles. The asterisks and solid lines are the experimental data and the corresponding fitting curves obtained at different angles. The dashed lines mark the peak positions of the curves.

Fig. 5. Measurement accuracy of different angles. The solid line with error bars shows the measuring results of six angles, and the dashed line is the theoretical value.

Fig. 6. Influence of the position shift error and the distance measurement error on the angle measurement accuracy.