../ dmsp_15_ephemeris_20180417.txt 22-Jun-2023 16:52 109677 dmsp_16_ephemeris_20180417.txt 22-Jun-2023 16:52 109571 dmsp_17_ephemeris_20180417.txt 22-Jun-2023 16:52 109763 dmsp_18_ephemeris_20180417.txt 22-Jun-2023 16:52 109585