../ dmsp_15_ephemeris_20241021.txt 21-Dec-2024 22:00 109465 dmsp_16_ephemeris_20241021.txt 21-Dec-2024 22:00 109445 dmsp_17_ephemeris_20241021.txt 21-Dec-2024 22:00 109417 dmsp_18_ephemeris_20241021.txt 21-Dec-2024 22:00 109436