../ dmsp_15_ephemeris_20170601.txt 22-Jun-2023 00:34 109548 dmsp_16_ephemeris_20170601.txt 22-Jun-2023 00:34 109503 dmsp_17_ephemeris_20170601.txt 22-Jun-2023 00:34 109679 dmsp_18_ephemeris_20170601.txt 22-Jun-2023 00:34 109686