../ dmsp_15_ephemeris_20190406.txt 22-Jun-2023 00:40 108146 dmsp_16_ephemeris_20190406.txt 22-Jun-2023 00:40 108244 dmsp_17_ephemeris_20190406.txt 22-Jun-2023 00:40 108293 dmsp_18_ephemeris_20190406.txt 22-Jun-2023 00:40 108221