../ dmsp_15_ephemeris_20190608.txt 22-Jun-2023 00:41 109547 dmsp_16_ephemeris_20190608.txt 22-Jun-2023 00:41 109542 dmsp_17_ephemeris_20190608.txt 22-Jun-2023 00:41 109635 dmsp_18_ephemeris_20190608.txt 22-Jun-2023 00:41 109615