../ dmsp_15_ephemeris_20120812.txt 22-Jun-2023 00:20 109504 dmsp_16_ephemeris_20120812.txt 22-Jun-2023 00:20 109615 dmsp_17_ephemeris_20120812.txt 22-Jun-2023 00:20 109603 dmsp_18_ephemeris_20120812.txt 22-Jun-2023 00:20 109691