../ dmsp_15_ephemeris_20170828.txt 22-Jun-2023 00:35 109614 dmsp_16_ephemeris_20170828.txt 22-Jun-2023 00:35 109663 dmsp_17_ephemeris_20170828.txt 22-Jun-2023 00:35 109743 dmsp_18_ephemeris_20170828.txt 22-Jun-2023 00:35 109715