../ dmsp_15_ephemeris_20190305.txt 22-Jun-2023 00:40 108189 dmsp_16_ephemeris_20190305.txt 22-Jun-2023 00:40 108128 dmsp_17_ephemeris_20190305.txt 22-Jun-2023 00:40 108139 dmsp_18_ephemeris_20190305.txt 22-Jun-2023 00:40 108140