../ dmsp_15_ephemeris_20170821.txt 22-Jun-2023 00:35 109651 dmsp_16_ephemeris_20170821.txt 22-Jun-2023 00:35 109681 dmsp_17_ephemeris_20170821.txt 22-Jun-2023 00:35 109734 dmsp_18_ephemeris_20170821.txt 22-Jun-2023 00:35 109701