../ dmsp_15_ephemeris_20180608.txt 22-Jun-2023 00:37 109558 dmsp_16_ephemeris_20180608.txt 22-Jun-2023 00:37 109502 dmsp_17_ephemeris_20180608.txt 22-Jun-2023 00:37 109695 dmsp_18_ephemeris_20180608.txt 22-Jun-2023 00:37 109536