../ dmsp_15_ephemeris_20110731.txt 22-Jun-2023 00:18 109475 dmsp_16_ephemeris_20110731.txt 22-Jun-2023 00:18 109683 dmsp_17_ephemeris_20110731.txt 22-Jun-2023 00:18 109725 dmsp_18_ephemeris_20110731.txt 22-Jun-2023 00:18 109715