../ dmsp_15_ephemeris_20190330.txt 22-Jun-2023 00:40 108183 dmsp_16_ephemeris_20190330.txt 22-Jun-2023 00:40 108269 dmsp_17_ephemeris_20190330.txt 22-Jun-2023 00:40 108246 dmsp_18_ephemeris_20190330.txt 22-Jun-2023 00:40 108246