../ dmsp_15_ephemeris_20170906.txt 22-Jun-2023 00:35 109587 dmsp_16_ephemeris_20170906.txt 22-Jun-2023 00:35 109615 dmsp_17_ephemeris_20170906.txt 22-Jun-2023 00:35 109590 dmsp_18_ephemeris_20170906.txt 22-Jun-2023 00:35 109713