../ dmsp_15_ephemeris_20170312.txt 22-Jun-2023 00:33 108251 dmsp_16_ephemeris_20170312.txt 22-Jun-2023 00:33 108149 dmsp_17_ephemeris_20170312.txt 22-Jun-2023 00:33 108127 dmsp_18_ephemeris_20170312.txt 22-Jun-2023 00:33 108250