../ dmsp_15_ephemeris_20180405.txt 22-Jun-2023 00:37 108115 dmsp_16_ephemeris_20180405.txt 22-Jun-2023 00:37 108216 dmsp_17_ephemeris_20180405.txt 22-Jun-2023 00:37 108284 dmsp_18_ephemeris_20180405.txt 22-Jun-2023 00:37 108162