../ dmsp_15_ephemeris_20130511.txt 22-Jun-2023 00:22 109560 dmsp_16_ephemeris_20130511.txt 22-Jun-2023 00:22 109553 dmsp_17_ephemeris_20130511.txt 22-Jun-2023 00:22 109766 dmsp_18_ephemeris_20130511.txt 22-Jun-2023 00:22 109757