../ dmsp_15_ephemeris_20190830.txt 22-Jun-2023 16:57 109600 dmsp_16_ephemeris_20190830.txt 22-Jun-2023 16:57 109539 dmsp_17_ephemeris_20190830.txt 22-Jun-2023 16:57 109707 dmsp_18_ephemeris_20190830.txt 22-Jun-2023 16:57 109670