../ dmsp_15_ephemeris_20170918.txt 22-Jun-2023 00:35 109655 dmsp_16_ephemeris_20170918.txt 22-Jun-2023 00:35 109596 dmsp_17_ephemeris_20170918.txt 22-Jun-2023 00:35 109713 dmsp_18_ephemeris_20170918.txt 22-Jun-2023 00:35 109533