../ dmsp_15_ephemeris_20110912.txt 22-Jun-2023 16:11 109668 dmsp_16_ephemeris_20110912.txt 22-Jun-2023 16:11 109746 dmsp_17_ephemeris_20110912.txt 22-Jun-2023 16:11 109674 dmsp_18_ephemeris_20110912.txt 22-Jun-2023 16:11 109736