../ dmsp_15_ephemeris_20180920.txt 22-Jun-2023 00:38 109526 dmsp_16_ephemeris_20180920.txt 22-Jun-2023 00:38 109520 dmsp_17_ephemeris_20180920.txt 22-Jun-2023 00:38 109640 dmsp_18_ephemeris_20180920.txt 22-Jun-2023 00:38 109620