../ dmsp_15_ephemeris_20120521.txt 22-Jun-2023 00:19 109564 dmsp_16_ephemeris_20120521.txt 22-Jun-2023 00:19 109550 dmsp_17_ephemeris_20120521.txt 22-Jun-2023 00:19 109571 dmsp_18_ephemeris_20120521.txt 22-Jun-2023 00:19 109552