../ dmsp_15_ephemeris_20120729.txt 22-Jun-2023 00:20 109504 dmsp_16_ephemeris_20120729.txt 22-Jun-2023 00:20 109722 dmsp_17_ephemeris_20120729.txt 22-Jun-2023 00:20 109688 dmsp_18_ephemeris_20120729.txt 22-Jun-2023 00:20 109652