../ dmsp_15_ephemeris_20190304.txt 22-Jun-2023 00:40 108200 dmsp_16_ephemeris_20190304.txt 22-Jun-2023 00:40 108219 dmsp_17_ephemeris_20190304.txt 22-Jun-2023 00:40 108139 dmsp_18_ephemeris_20190304.txt 22-Jun-2023 00:40 108151