../ dmsp_15_ephemeris_20190321.txt 22-Jun-2023 00:40 108273 dmsp_16_ephemeris_20190321.txt 22-Jun-2023 00:40 108166 dmsp_17_ephemeris_20190321.txt 22-Jun-2023 00:40 108183 dmsp_18_ephemeris_20190321.txt 22-Jun-2023 00:40 108170