../ dmsp_15_ephemeris_20110516.txt 22-Jun-2023 00:17 109568 dmsp_16_ephemeris_20110516.txt 22-Jun-2023 00:17 109722 dmsp_17_ephemeris_20110516.txt 22-Jun-2023 00:17 109697 dmsp_18_ephemeris_20110516.txt 22-Jun-2023 00:17 109671