../ dmsp_15_ephemeris_20180424.txt 22-Jun-2023 00:37 109567 dmsp_16_ephemeris_20180424.txt 22-Jun-2023 00:37 109595 dmsp_17_ephemeris_20180424.txt 22-Jun-2023 00:37 109679 dmsp_18_ephemeris_20180424.txt 22-Jun-2023 00:37 109683