../ dmsp_15_ephemeris_20180827.txt 22-Jun-2023 16:53 109554 dmsp_16_ephemeris_20180827.txt 22-Jun-2023 16:53 109609 dmsp_17_ephemeris_20180827.txt 22-Jun-2023 16:53 109756 dmsp_18_ephemeris_20180827.txt 22-Jun-2023 16:53 109605