../ dmsp_15_ephemeris_20111111.txt 22-Jun-2023 00:18 109519 dmsp_16_ephemeris_20111111.txt 22-Jun-2023 00:18 109406 dmsp_17_ephemeris_20111111.txt 22-Jun-2023 00:18 109408 dmsp_18_ephemeris_20111111.txt 22-Jun-2023 00:18 109446