../ dmsp_15_ephemeris_20171226.txt 22-Jun-2023 00:36 109470 dmsp_16_ephemeris_20171226.txt 22-Jun-2023 00:36 109305 dmsp_17_ephemeris_20171226.txt 22-Jun-2023 00:36 109360 dmsp_18_ephemeris_20171226.txt 22-Jun-2023 00:36 109299