../ dmsp_15_ephemeris_20110121.txt 22-Jun-2023 00:16 107978 dmsp_16_ephemeris_20110121.txt 22-Jun-2023 00:16 107872 dmsp_17_ephemeris_20110121.txt 22-Jun-2023 00:16 107924 dmsp_18_ephemeris_20110121.txt 22-Jun-2023 00:16 107887