../ dmsp_15_ephemeris_20130221.txt 22-Jun-2023 00:21 108060 dmsp_16_ephemeris_20130221.txt 22-Jun-2023 00:21 108039 dmsp_17_ephemeris_20130221.txt 22-Jun-2023 00:21 108235 dmsp_18_ephemeris_20130221.txt 22-Jun-2023 00:21 108121