../ dmsp_15_ephemeris_20241015.txt 15-Dec-2024 22:00 109581 dmsp_16_ephemeris_20241015.txt 15-Dec-2024 22:00 109550 dmsp_17_ephemeris_20241015.txt 15-Dec-2024 22:00 109550 dmsp_18_ephemeris_20241015.txt 15-Dec-2024 22:00 109567