../ dmsp_15_ephemeris_20130504.txt 22-Jun-2023 00:22 109535 dmsp_16_ephemeris_20130504.txt 22-Jun-2023 00:22 109638 dmsp_17_ephemeris_20130504.txt 22-Jun-2023 00:22 109671 dmsp_18_ephemeris_20130504.txt 22-Jun-2023 00:22 109716