../ dmsp_15_ephemeris_20210309.txt 22-Jun-2023 00:46 108224 dmsp_16_ephemeris_20210309.txt 22-Jun-2023 00:46 108207 dmsp_17_ephemeris_20210309.txt 22-Jun-2023 00:46 108002 dmsp_18_ephemeris_20210309.txt 22-Jun-2023 00:46 108096