../ dmsp_15_ephemeris_20241024.txt 24-Dec-2024 22:00 109331 dmsp_16_ephemeris_20241024.txt 24-Dec-2024 22:00 109364 dmsp_17_ephemeris_20241024.txt 24-Dec-2024 22:00 109555 dmsp_18_ephemeris_20241024.txt 24-Dec-2024 22:00 109496