../ dmsp_15_ephemeris_20170708.txt 22-Jun-2023 00:34 109535 dmsp_16_ephemeris_20170708.txt 22-Jun-2023 00:34 109474 dmsp_17_ephemeris_20170708.txt 22-Jun-2023 00:34 109598 dmsp_18_ephemeris_20170708.txt 22-Jun-2023 00:34 109615