../ dmsp_15_ephemeris_20180121.txt 22-Jun-2023 00:36 108016 dmsp_16_ephemeris_20180121.txt 22-Jun-2023 00:36 107963 dmsp_17_ephemeris_20180121.txt 22-Jun-2023 00:36 107869 dmsp_18_ephemeris_20180121.txt 22-Jun-2023 00:36 107867