../ dmsp_15_ephemeris_20201216.txt 22-Jun-2023 00:45 109507 dmsp_16_ephemeris_20201216.txt 22-Jun-2023 00:45 109331 dmsp_17_ephemeris_20201216.txt 22-Jun-2023 00:45 109246 dmsp_18_ephemeris_20201216.txt 22-Jun-2023 00:45 109223