../ dmsp_15_ephemeris_20230404.txt 22-Jun-2023 00:55 108239 dmsp_16_ephemeris_20230404.txt 22-Jun-2023 00:55 108235 dmsp_17_ephemeris_20230404.txt 22-Jun-2023 00:55 108256 dmsp_18_ephemeris_20230404.txt 22-Jun-2023 00:55 108152