Fig. 1. Testing platform

Fig. 2. Beaconc(~1 000 km) laser ranging satellite echo signal

Fig. 3. Beidou satellite compassi6b (~36 000 km) ranging echo signal

Fig. 4. Echo signal of space debris 22803 (~850 km, 10 m²RCS)

Fig. 5. glonass134(~20 000 km) laser ranging interface screenshot

Fig. 6. hy2a(~1 000km) laser ranging interface screenshot

Fig. 7. Sky background brightness map

Fig. 8. SNSPD output at 7:48:59 to 8:5:18 Beijing time

Fig. 9. SNSPD output at 8:01:21 to 8:29:15 Beijing time

Fig. 10. SNSPD output at 8:20:14 to 8:55:44 Beijing time

Fig. 11. SNSPD output at 8:47:42 to 14:53:23 Beijing time