../ dmsp_15_ephemeris_20190209.txt 22-Jun-2023 00:39 108008 dmsp_16_ephemeris_20190209.txt 22-Jun-2023 00:39 107994 dmsp_17_ephemeris_20190209.txt 22-Jun-2023 00:39 108145 dmsp_18_ephemeris_20190209.txt 22-Jun-2023 00:39 108015