../ dmsp_15_ephemeris_20170410.txt 22-Jun-2023 00:34 109701 dmsp_16_ephemeris_20170410.txt 22-Jun-2023 00:34 109578 dmsp_17_ephemeris_20170410.txt 22-Jun-2023 00:34 109802 dmsp_18_ephemeris_20170410.txt 22-Jun-2023 00:34 109696