../ dmsp_15_ephemeris_20170317.txt 22-Jun-2023 00:33 108139 dmsp_16_ephemeris_20170317.txt 22-Jun-2023 00:33 108223 dmsp_17_ephemeris_20170317.txt 22-Jun-2023 00:33 108163 dmsp_18_ephemeris_20170317.txt 22-Jun-2023 00:33 108111