../ dmsp_15_ephemeris_20120615.txt 22-Jun-2023 00:20 109504 dmsp_16_ephemeris_20120615.txt 22-Jun-2023 00:20 109694 dmsp_17_ephemeris_20120615.txt 22-Jun-2023 00:20 109691 dmsp_18_ephemeris_20120615.txt 22-Jun-2023 00:20 109503