../ dmsp_15_ephemeris_20210515.txt 22-Jun-2023 16:35 109593 dmsp_16_ephemeris_20210515.txt 22-Jun-2023 16:35 109638 dmsp_17_ephemeris_20210515.txt 22-Jun-2023 16:35 109551 dmsp_18_ephemeris_20210515.txt 22-Jun-2023 16:35 109585