../ dmsp_15_ephemeris_20210421.txt 22-Jun-2023 00:46 109595 dmsp_16_ephemeris_20210421.txt 22-Jun-2023 00:46 109695 dmsp_17_ephemeris_20210421.txt 22-Jun-2023 00:46 109744 dmsp_18_ephemeris_20210421.txt 22-Jun-2023 00:46 109593