../ dmsp_15_ephemeris_20170525.txt 22-Jun-2023 00:34 109539 dmsp_16_ephemeris_20170525.txt 22-Jun-2023 00:34 109455 dmsp_17_ephemeris_20170525.txt 22-Jun-2023 00:34 109649 dmsp_18_ephemeris_20170525.txt 22-Jun-2023 00:34 109587