../ dmsp_15_ephemeris_20170504.txt 22-Jun-2023 00:34 109455 dmsp_16_ephemeris_20170504.txt 22-Jun-2023 00:34 109617 dmsp_17_ephemeris_20170504.txt 22-Jun-2023 00:34 109585 dmsp_18_ephemeris_20170504.txt 22-Jun-2023 00:34 109713