../ dmsp_15_ephemeris_20240217.txt 17-Apr-2024 22:00 108021 dmsp_16_ephemeris_20240217.txt 17-Apr-2024 22:00 108120 dmsp_17_ephemeris_20240217.txt 17-Apr-2024 22:00 108102 dmsp_18_ephemeris_20240217.txt 17-Apr-2024 22:00 108032