../ dmsp_15_ephemeris_20170516.txt 22-Jun-2023 00:34 109380 dmsp_16_ephemeris_20170516.txt 22-Jun-2023 00:34 109576 dmsp_17_ephemeris_20170516.txt 22-Jun-2023 00:34 109620 dmsp_18_ephemeris_20170516.txt 22-Jun-2023 00:34 109598