../ dmsp_15_ephemeris_20130731.txt 22-Jun-2023 16:35 109573 dmsp_16_ephemeris_20130731.txt 22-Jun-2023 16:35 109631 dmsp_17_ephemeris_20130731.txt 22-Jun-2023 16:35 109661 dmsp_18_ephemeris_20130731.txt 22-Jun-2023 16:35 109638