../ dmsp_15_ephemeris_20110818.txt 22-Jun-2023 00:18 109626 dmsp_16_ephemeris_20110818.txt 22-Jun-2023 00:18 109738 dmsp_17_ephemeris_20110818.txt 22-Jun-2023 00:18 109683 dmsp_18_ephemeris_20110818.txt 22-Jun-2023 00:18 109706