../ dmsp_15_ephemeris_20170518.txt 22-Jun-2023 16:49 109585 dmsp_16_ephemeris_20170518.txt 22-Jun-2023 16:49 109621 dmsp_17_ephemeris_20170518.txt 22-Jun-2023 16:49 109640 dmsp_18_ephemeris_20170518.txt 22-Jun-2023 16:49 109629