../ dmsp_15_ephemeris_20201221.txt 22-Jun-2023 16:34 109233 dmsp_16_ephemeris_20201221.txt 22-Jun-2023 16:34 109428 dmsp_17_ephemeris_20201221.txt 22-Jun-2023 16:34 109302 dmsp_18_ephemeris_20201221.txt 22-Jun-2023 16:34 109384