../ dmsp_15_ephemeris_20110509.txt 22-Jun-2023 00:17 109451 dmsp_16_ephemeris_20110509.txt 22-Jun-2023 00:17 109648 dmsp_17_ephemeris_20110509.txt 22-Jun-2023 00:17 109582 dmsp_18_ephemeris_20110509.txt 22-Jun-2023 00:17 109635