../ dmsp_15_ephemeris_20190420.txt 22-Jun-2023 00:40 109504 dmsp_16_ephemeris_20190420.txt 22-Jun-2023 00:40 109561 dmsp_17_ephemeris_20190420.txt 22-Jun-2023 00:40 109672 dmsp_18_ephemeris_20190420.txt 22-Jun-2023 00:40 109471