../ dmsp_15_ephemeris_20241020.txt 20-Dec-2024 22:00 109626 dmsp_16_ephemeris_20241020.txt 20-Dec-2024 22:00 109428 dmsp_17_ephemeris_20241020.txt 20-Dec-2024 22:00 109541 dmsp_18_ephemeris_20241020.txt 20-Dec-2024 22:00 109552