../ dmsp_15_ephemeris_20170709.txt 22-Jun-2023 16:49 109503 dmsp_16_ephemeris_20170709.txt 22-Jun-2023 16:49 109416 dmsp_17_ephemeris_20170709.txt 22-Jun-2023 16:49 109624 dmsp_18_ephemeris_20170709.txt 22-Jun-2023 16:49 109575