../ dmsp_15_ephemeris_20170813.txt 22-Jun-2023 00:35 109663 dmsp_16_ephemeris_20170813.txt 22-Jun-2023 00:35 109547 dmsp_17_ephemeris_20170813.txt 22-Jun-2023 00:35 109644 dmsp_18_ephemeris_20170813.txt 22-Jun-2023 00:35 109690