../ dmsp_15_ephemeris_20180425.txt 22-Jun-2023 16:52 109657 dmsp_16_ephemeris_20180425.txt 22-Jun-2023 16:52 109631 dmsp_17_ephemeris_20180425.txt 22-Jun-2023 16:52 109708 dmsp_18_ephemeris_20180425.txt 22-Jun-2023 16:52 109573