../ dmsp_15_ephemeris_20171230.txt 22-Jun-2023 00:36 109392 dmsp_16_ephemeris_20171230.txt 22-Jun-2023 00:36 109372 dmsp_17_ephemeris_20171230.txt 22-Jun-2023 00:36 109264 dmsp_18_ephemeris_20171230.txt 22-Jun-2023 00:36 109307