../ dmsp_15_ephemeris_20190531.txt 22-Jun-2023 00:40 109478 dmsp_16_ephemeris_20190531.txt 22-Jun-2023 00:40 109578 dmsp_17_ephemeris_20190531.txt 22-Jun-2023 00:40 109580 dmsp_18_ephemeris_20190531.txt 22-Jun-2023 00:40 109597