../ dmsp_15_ephemeris_20201120.txt 22-Jun-2023 17:01 109404 dmsp_16_ephemeris_20201120.txt 22-Jun-2023 17:01 109408 dmsp_17_ephemeris_20201120.txt 22-Jun-2023 17:01 109412 dmsp_18_ephemeris_20201120.txt 22-Jun-2023 17:01 109463