../ dmsp_15_ephemeris_20190408.txt 22-Jun-2023 00:40 108175 dmsp_16_ephemeris_20190408.txt 22-Jun-2023 00:40 108216 dmsp_17_ephemeris_20190408.txt 22-Jun-2023 00:40 108162 dmsp_18_ephemeris_20190408.txt 22-Jun-2023 00:40 108155