../ dmsp_15_ephemeris_20170329.txt 22-Jun-2023 00:33 108206 dmsp_16_ephemeris_20170329.txt 22-Jun-2023 00:33 108275 dmsp_17_ephemeris_20170329.txt 22-Jun-2023 00:33 108356 dmsp_18_ephemeris_20170329.txt 22-Jun-2023 00:33 108172