../ dmsp_15_ephemeris_20191221.txt 22-Jun-2023 00:42 109303 dmsp_16_ephemeris_20191221.txt 22-Jun-2023 00:42 109340 dmsp_17_ephemeris_20191221.txt 22-Jun-2023 00:42 109224 dmsp_18_ephemeris_20191221.txt 22-Jun-2023 00:42 109183