../ dmsp_15_ephemeris_20190912.txt 22-Jun-2023 00:41 109661 dmsp_16_ephemeris_20190912.txt 22-Jun-2023 00:41 109595 dmsp_17_ephemeris_20190912.txt 22-Jun-2023 00:41 109728 dmsp_18_ephemeris_20190912.txt 22-Jun-2023 00:41 109571