../ dmsp_15_ephemeris_20241018.txt 18-Dec-2024 22:00 109499 dmsp_16_ephemeris_20241018.txt 18-Dec-2024 22:00 109561 dmsp_17_ephemeris_20241018.txt 18-Dec-2024 22:00 109545 dmsp_18_ephemeris_20241018.txt 18-Dec-2024 22:00 109539