../ dmsp_15_ephemeris_20171213.txt 22-Jun-2023 00:36 109490 dmsp_16_ephemeris_20171213.txt 22-Jun-2023 00:36 109335 dmsp_17_ephemeris_20171213.txt 22-Jun-2023 00:36 109339 dmsp_18_ephemeris_20171213.txt 22-Jun-2023 00:36 109384