../ dmsp_15_ephemeris_20170917.txt 22-Jun-2023 16:50 109665 dmsp_16_ephemeris_20170917.txt 22-Jun-2023 16:50 109634 dmsp_17_ephemeris_20170917.txt 22-Jun-2023 16:50 109735 dmsp_18_ephemeris_20170917.txt 22-Jun-2023 16:50 109661