../ dmsp_15_ephemeris_20110510.txt 22-Jun-2023 00:17 109549 dmsp_16_ephemeris_20110510.txt 22-Jun-2023 00:17 109637 dmsp_17_ephemeris_20110510.txt 22-Jun-2023 00:17 109548 dmsp_18_ephemeris_20110510.txt 22-Jun-2023 00:17 109659