../ dmsp_15_ephemeris_20120121.txt 22-Jun-2023 00:19 107933 dmsp_16_ephemeris_20120121.txt 22-Jun-2023 00:19 107953 dmsp_17_ephemeris_20120121.txt 22-Jun-2023 00:19 108029 dmsp_18_ephemeris_20120121.txt 22-Jun-2023 00:19 107933