As for Fig. 6, but for the same pulsation phase in consecutive pulsation cycles to investigate cycle-to-cycle visibility variations. The top panel shows the example of pulsation phase  ~0.5 in three consecutive cycles observed with a projected baseline length of  ~61 m and a position angle  ~75 deg. The bottom panel shows the example of pulsation phase 0.5 in two consecutive cycles observed with a projected baseline length of  ~29 m and a position angle  ~70 deg.