../ dmsp_15_ephemeris_20170912.txt 22-Jun-2023 00:35 109555 dmsp_16_ephemeris_20170912.txt 22-Jun-2023 00:35 109486 dmsp_17_ephemeris_20170912.txt 22-Jun-2023 00:35 109772 dmsp_18_ephemeris_20170912.txt 22-Jun-2023 00:35 109554