../ dmsp_15_ephemeris_20180321.txt 22-Jun-2023 00:36 108135 dmsp_16_ephemeris_20180321.txt 22-Jun-2023 00:36 108194 dmsp_17_ephemeris_20180321.txt 22-Jun-2023 00:36 108180 dmsp_18_ephemeris_20180321.txt 22-Jun-2023 00:36 108224