../ dmsp_15_ephemeris_20201221.txt 22-Jun-2023 00:45 109233 dmsp_16_ephemeris_20201221.txt 22-Jun-2023 00:45 109428 dmsp_17_ephemeris_20201221.txt 22-Jun-2023 00:45 109302 dmsp_18_ephemeris_20201221.txt 22-Jun-2023 00:45 109384