../ dmsp_15_ephemeris_20190813.txt 22-Jun-2023 00:41 109598 dmsp_16_ephemeris_20190813.txt 22-Jun-2023 00:41 109653 dmsp_17_ephemeris_20190813.txt 22-Jun-2023 00:41 109715 dmsp_18_ephemeris_20190813.txt 22-Jun-2023 00:41 109648