../ dmsp_15_ephemeris_20180727.txt 22-Jun-2023 16:53 109413 dmsp_16_ephemeris_20180727.txt 22-Jun-2023 16:53 109477 dmsp_17_ephemeris_20180727.txt 22-Jun-2023 16:53 109723 dmsp_18_ephemeris_20180727.txt 22-Jun-2023 16:53 109491