../ dmsp_15_ephemeris_20180306.txt 22-Jun-2023 16:52 108237 dmsp_16_ephemeris_20180306.txt 22-Jun-2023 16:52 108152 dmsp_17_ephemeris_20180306.txt 22-Jun-2023 16:52 108235 dmsp_18_ephemeris_20180306.txt 22-Jun-2023 16:52 108209