../ dmsp_15_ephemeris_20110917.txt 22-Jun-2023 00:18 109582 dmsp_16_ephemeris_20110917.txt 22-Jun-2023 00:18 109654 dmsp_17_ephemeris_20110917.txt 22-Jun-2023 00:18 109735 dmsp_18_ephemeris_20110917.txt 22-Jun-2023 00:18 109760