../ dmsp_15_ephemeris_20180917.txt 22-Jun-2023 00:38 109557 dmsp_16_ephemeris_20180917.txt 22-Jun-2023 00:38 109687 dmsp_17_ephemeris_20180917.txt 22-Jun-2023 00:38 109527 dmsp_18_ephemeris_20180917.txt 22-Jun-2023 00:38 109657