../ dmsp_15_ephemeris_20190811.txt 22-Jun-2023 16:31 109585 dmsp_16_ephemeris_20190811.txt 22-Jun-2023 16:31 109600 dmsp_17_ephemeris_20190811.txt 22-Jun-2023 16:31 109617 dmsp_18_ephemeris_20190811.txt 22-Jun-2023 16:31 109638