../ dmsp_15_ephemeris_20190401.txt 22-Jun-2023 00:40 108217 dmsp_16_ephemeris_20190401.txt 22-Jun-2023 00:40 108212 dmsp_17_ephemeris_20190401.txt 22-Jun-2023 00:40 108199 dmsp_18_ephemeris_20190401.txt 22-Jun-2023 00:40 108234