../ dmsp_15_ephemeris_20110831.txt 22-Jun-2023 16:11 109701 dmsp_16_ephemeris_20110831.txt 22-Jun-2023 16:11 109755 dmsp_17_ephemeris_20110831.txt 22-Jun-2023 16:11 109772 dmsp_18_ephemeris_20110831.txt 22-Jun-2023 16:11 109810