../ dmsp_15_ephemeris_20130720.txt 22-Jun-2023 00:22 109573 dmsp_16_ephemeris_20130720.txt 22-Jun-2023 00:22 109627 dmsp_17_ephemeris_20130720.txt 22-Jun-2023 00:22 109706 dmsp_18_ephemeris_20130720.txt 22-Jun-2023 00:22 109528