../ dmsp_15_ephemeris_20170406.txt 22-Jun-2023 16:48 108247 dmsp_16_ephemeris_20170406.txt 22-Jun-2023 16:48 108238 dmsp_17_ephemeris_20170406.txt 22-Jun-2023 16:48 108315 dmsp_18_ephemeris_20170406.txt 22-Jun-2023 16:48 108287