../ dmsp_15_ephemeris_20190724.txt 22-Jun-2023 00:41 109518 dmsp_16_ephemeris_20190724.txt 22-Jun-2023 00:41 109578 dmsp_17_ephemeris_20190724.txt 22-Jun-2023 00:41 109585 dmsp_18_ephemeris_20190724.txt 22-Jun-2023 00:41 109501