../ dmsp_15_ephemeris_20190407.txt 22-Jun-2023 00:40 108189 dmsp_16_ephemeris_20190407.txt 22-Jun-2023 00:40 108217 dmsp_17_ephemeris_20190407.txt 22-Jun-2023 00:40 108309 dmsp_18_ephemeris_20190407.txt 22-Jun-2023 00:40 108200