../ dmsp_15_ephemeris_20110918.txt 22-Jun-2023 00:18 109607 dmsp_16_ephemeris_20110918.txt 22-Jun-2023 00:18 109615 dmsp_17_ephemeris_20110918.txt 22-Jun-2023 00:18 109729 dmsp_18_ephemeris_20110918.txt 22-Jun-2023 00:18 109532