../ dmsp_15_ephemeris_20110423.txt 22-Jun-2023 00:17 109568 dmsp_16_ephemeris_20110423.txt 22-Jun-2023 00:17 109647 dmsp_17_ephemeris_20110423.txt 22-Jun-2023 00:17 109719 dmsp_18_ephemeris_20110423.txt 22-Jun-2023 00:17 109639