../ dmsp_15_ephemeris_20180401.txt 22-Jun-2023 16:52 108185 dmsp_16_ephemeris_20180401.txt 22-Jun-2023 16:52 108235 dmsp_17_ephemeris_20180401.txt 22-Jun-2023 16:52 108296 dmsp_18_ephemeris_20180401.txt 22-Jun-2023 16:52 108088