../ dmsp_15_ephemeris_20170131.txt 22-Jun-2023 00:33 108067 dmsp_16_ephemeris_20170131.txt 22-Jun-2023 00:33 108209 dmsp_17_ephemeris_20170131.txt 22-Jun-2023 00:33 108071 dmsp_18_ephemeris_20170131.txt 22-Jun-2023 00:33 108064