../ dmsp_15_ephemeris_20171218.txt 22-Jun-2023 00:36 109356 dmsp_16_ephemeris_20171218.txt 22-Jun-2023 00:36 109356 dmsp_17_ephemeris_20171218.txt 22-Jun-2023 00:36 109187 dmsp_18_ephemeris_20171218.txt 22-Jun-2023 00:36 109331