../ dmsp_15_ephemeris_20200831.txt 22-Jun-2023 16:34 109578 dmsp_16_ephemeris_20200831.txt 22-Jun-2023 16:34 109598 dmsp_17_ephemeris_20200831.txt 22-Jun-2023 16:34 109654 dmsp_18_ephemeris_20200831.txt 22-Jun-2023 16:34 109605