../ dmsp_15_ephemeris_20180604.txt 22-Jun-2023 16:52 109542 dmsp_16_ephemeris_20180604.txt 22-Jun-2023 16:52 109546 dmsp_17_ephemeris_20180604.txt 22-Jun-2023 16:52 109687 dmsp_18_ephemeris_20180604.txt 22-Jun-2023 16:52 109516