../ dmsp_15_ephemeris_20190906.txt 22-Jun-2023 00:41 109617 dmsp_16_ephemeris_20190906.txt 22-Jun-2023 00:41 109712 dmsp_17_ephemeris_20190906.txt 22-Jun-2023 00:41 109736 dmsp_18_ephemeris_20190906.txt 22-Jun-2023 00:41 109684