../ dmsp_15_ephemeris_20180523.txt 22-Jun-2023 00:37 109613 dmsp_16_ephemeris_20180523.txt 22-Jun-2023 00:37 109542 dmsp_17_ephemeris_20180523.txt 22-Jun-2023 00:37 109646 dmsp_18_ephemeris_20180523.txt 22-Jun-2023 00:37 109602