../ dmsp_15_ephemeris_20170729.txt 22-Jun-2023 00:34 109565 dmsp_16_ephemeris_20170729.txt 22-Jun-2023 00:34 109569 dmsp_17_ephemeris_20170729.txt 22-Jun-2023 00:34 109675 dmsp_18_ephemeris_20170729.txt 22-Jun-2023 00:34 109728