../ dmsp_15_ephemeris_20171215.txt 22-Jun-2023 00:36 109423 dmsp_16_ephemeris_20171215.txt 22-Jun-2023 00:36 109310 dmsp_17_ephemeris_20171215.txt 22-Jun-2023 00:36 109356 dmsp_18_ephemeris_20171215.txt 22-Jun-2023 00:36 109264