../ dmsp_15_ephemeris_20110519.txt 22-Jun-2023 00:17 109654 dmsp_16_ephemeris_20110519.txt 22-Jun-2023 00:17 109701 dmsp_17_ephemeris_20110519.txt 22-Jun-2023 00:17 109604 dmsp_18_ephemeris_20110519.txt 22-Jun-2023 00:17 109512