../ dmsp_15_ephemeris_20180226.txt 22-Jun-2023 16:51 108126 dmsp_16_ephemeris_20180226.txt 22-Jun-2023 16:51 108091 dmsp_17_ephemeris_20180226.txt 22-Jun-2023 16:51 108178 dmsp_18_ephemeris_20180226.txt 22-Jun-2023 16:51 108140