../ dmsp_15_ephemeris_20170811.txt 22-Jun-2023 00:35 109507 dmsp_16_ephemeris_20170811.txt 22-Jun-2023 00:35 109494 dmsp_17_ephemeris_20170811.txt 22-Jun-2023 00:35 109718 dmsp_18_ephemeris_20170811.txt 22-Jun-2023 00:35 109720