../ dmsp_15_ephemeris_20170331.txt 22-Jun-2023 00:33 108238 dmsp_16_ephemeris_20170331.txt 22-Jun-2023 00:33 108092 dmsp_17_ephemeris_20170331.txt 22-Jun-2023 00:33 108076 dmsp_18_ephemeris_20170331.txt 22-Jun-2023 00:33 108178