../ dmsp_15_ephemeris_20170930.txt 22-Jun-2023 00:35 109673 dmsp_16_ephemeris_20170930.txt 22-Jun-2023 00:35 109651 dmsp_17_ephemeris_20170930.txt 22-Jun-2023 00:35 109545 dmsp_18_ephemeris_20170930.txt 22-Jun-2023 00:35 109536