../ dmsp_15_ephemeris_20120912.txt 22-Jun-2023 00:20 109634 dmsp_16_ephemeris_20120912.txt 22-Jun-2023 00:20 109549 dmsp_17_ephemeris_20120912.txt 22-Jun-2023 00:20 109635 dmsp_18_ephemeris_20120912.txt 22-Jun-2023 00:20 109776