../ dmsp_15_ephemeris_20120330.txt 22-Jun-2023 00:19 108141 dmsp_16_ephemeris_20120330.txt 22-Jun-2023 00:19 108209 dmsp_17_ephemeris_20120330.txt 22-Jun-2023 00:19 108178 dmsp_18_ephemeris_20120330.txt 22-Jun-2023 00:19 108221