../ dmsp_15_ephemeris_20170730.txt 22-Jun-2023 00:34 109585 dmsp_16_ephemeris_20170730.txt 22-Jun-2023 00:34 109653 dmsp_17_ephemeris_20170730.txt 22-Jun-2023 00:34 109518 dmsp_18_ephemeris_20170730.txt 22-Jun-2023 00:34 109677