../ dmsp_15_ephemeris_20171118.txt 22-Jun-2023 00:35 109499 dmsp_16_ephemeris_20171118.txt 22-Jun-2023 00:35 109384 dmsp_17_ephemeris_20171118.txt 22-Jun-2023 00:35 109407 dmsp_18_ephemeris_20171118.txt 22-Jun-2023 00:35 109230