../ dmsp_15_ephemeris_20201021.txt 22-Jun-2023 17:00 109597 dmsp_16_ephemeris_20201021.txt 22-Jun-2023 17:00 109501 dmsp_17_ephemeris_20201021.txt 22-Jun-2023 17:00 109512 dmsp_18_ephemeris_20201021.txt 22-Jun-2023 17:00 109512