../ dmsp_15_ephemeris_20170620.txt 22-Jun-2023 00:34 109552 dmsp_16_ephemeris_20170620.txt 22-Jun-2023 00:34 109501 dmsp_17_ephemeris_20170620.txt 22-Jun-2023 00:34 109660 dmsp_18_ephemeris_20170620.txt 22-Jun-2023 00:34 109481