../ dmsp_15_ephemeris_20190811.txt 22-Jun-2023 00:41 109585 dmsp_16_ephemeris_20190811.txt 22-Jun-2023 00:41 109600 dmsp_17_ephemeris_20190811.txt 22-Jun-2023 00:41 109617 dmsp_18_ephemeris_20190811.txt 22-Jun-2023 00:41 109638