../ dmsp_15_ephemeris_20201220.txt 22-Jun-2023 17:01 109438 dmsp_16_ephemeris_20201220.txt 22-Jun-2023 17:01 109375 dmsp_17_ephemeris_20201220.txt 22-Jun-2023 17:01 109233 dmsp_18_ephemeris_20201220.txt 22-Jun-2023 17:01 109170