../ dmsp_15_ephemeris_20170911.txt 22-Jun-2023 00:35 109588 dmsp_16_ephemeris_20170911.txt 22-Jun-2023 00:35 109687 dmsp_17_ephemeris_20170911.txt 22-Jun-2023 00:35 109690 dmsp_18_ephemeris_20170911.txt 22-Jun-2023 00:35 109671