../ dmsp_15_ephemeris_20180406.txt 22-Jun-2023 16:52 108173 dmsp_16_ephemeris_20180406.txt 22-Jun-2023 16:52 108146 dmsp_17_ephemeris_20180406.txt 22-Jun-2023 16:52 108237 dmsp_18_ephemeris_20180406.txt 22-Jun-2023 16:52 108270