../ dmsp_15_ephemeris_20180906.txt 22-Jun-2023 00:38 109720 dmsp_16_ephemeris_20180906.txt 22-Jun-2023 00:38 109732 dmsp_17_ephemeris_20180906.txt 22-Jun-2023 00:38 109631 dmsp_18_ephemeris_20180906.txt 22-Jun-2023 00:38 109613