../ dmsp_15_ephemeris_20180716.txt 22-Jun-2023 00:37 109434 dmsp_16_ephemeris_20180716.txt 22-Jun-2023 00:37 109559 dmsp_17_ephemeris_20180716.txt 22-Jun-2023 00:37 109625 dmsp_18_ephemeris_20180716.txt 22-Jun-2023 00:37 109603