../ dmsp_15_ephemeris_20241019.txt 19-Dec-2024 22:00 109516 dmsp_16_ephemeris_20241019.txt 19-Dec-2024 22:00 109538 dmsp_17_ephemeris_20241019.txt 19-Dec-2024 22:00 109574 dmsp_18_ephemeris_20241019.txt 19-Dec-2024 22:00 109590