../ dmsp_15_ephemeris_20120519.txt 22-Jun-2023 00:19 109503 dmsp_16_ephemeris_20120519.txt 22-Jun-2023 00:19 109644 dmsp_17_ephemeris_20120519.txt 22-Jun-2023 00:19 109815 dmsp_18_ephemeris_20120519.txt 22-Jun-2023 00:19 109786