../ dmsp_15_ephemeris_20170315.txt 22-Jun-2023 00:33 108218 dmsp_16_ephemeris_20170315.txt 22-Jun-2023 00:33 108262 dmsp_17_ephemeris_20170315.txt 22-Jun-2023 00:33 108246 dmsp_18_ephemeris_20170315.txt 22-Jun-2023 00:33 108196