../ dmsp_15_ephemeris_20170511.txt 22-Jun-2023 00:34 109561 dmsp_16_ephemeris_20170511.txt 22-Jun-2023 00:34 109484 dmsp_17_ephemeris_20170511.txt 22-Jun-2023 00:34 109657 dmsp_18_ephemeris_20170511.txt 22-Jun-2023 00:34 109615