../ dmsp_15_ephemeris_20180910.txt 22-Jun-2023 00:38 109637 dmsp_16_ephemeris_20180910.txt 22-Jun-2023 00:38 109510 dmsp_17_ephemeris_20180910.txt 22-Jun-2023 00:38 109701 dmsp_18_ephemeris_20180910.txt 22-Jun-2023 00:38 109638