../ dmsp_15_ephemeris_20180527.txt 22-Jun-2023 00:37 109514 dmsp_16_ephemeris_20180527.txt 22-Jun-2023 00:37 109631 dmsp_17_ephemeris_20180527.txt 22-Jun-2023 00:37 109677 dmsp_18_ephemeris_20180527.txt 22-Jun-2023 00:37 109518