../ dmsp_15_ephemeris_20180121.txt 22-Jun-2023 16:51 108016 dmsp_16_ephemeris_20180121.txt 22-Jun-2023 16:51 107963 dmsp_17_ephemeris_20180121.txt 22-Jun-2023 16:51 107869 dmsp_18_ephemeris_20180121.txt 22-Jun-2023 16:51 107867