../ dmsp_15_ephemeris_20171120.txt 22-Jun-2023 16:51 109461 dmsp_16_ephemeris_20171120.txt 22-Jun-2023 16:51 109499 dmsp_17_ephemeris_20171120.txt 22-Jun-2023 16:51 109347 dmsp_18_ephemeris_20171120.txt 22-Jun-2023 16:51 109333