../ dmsp_15_ephemeris_20120221.txt 22-Jun-2023 00:19 108179 dmsp_16_ephemeris_20120221.txt 22-Jun-2023 00:19 108119 dmsp_17_ephemeris_20120221.txt 22-Jun-2023 00:19 108135 dmsp_18_ephemeris_20120221.txt 22-Jun-2023 00:19 108235