../ dmsp_15_ephemeris_20190816.txt 22-Jun-2023 00:41 109546 dmsp_16_ephemeris_20190816.txt 22-Jun-2023 00:41 109573 dmsp_17_ephemeris_20190816.txt 22-Jun-2023 00:41 109639 dmsp_18_ephemeris_20190816.txt 22-Jun-2023 00:41 109572