../ dmsp_15_ephemeris_20240312.txt 12-May-2024 22:00 243 dmsp_16_ephemeris_20240312.txt 12-May-2024 22:00 243 dmsp_17_ephemeris_20240312.txt 12-May-2024 22:00 243 dmsp_18_ephemeris_20240312.txt 12-May-2024 22:00 243