../ dmsp_15_ephemeris_20120825.txt 22-Jun-2023 00:20 109584 dmsp_16_ephemeris_20120825.txt 22-Jun-2023 00:20 109638 dmsp_17_ephemeris_20120825.txt 22-Jun-2023 00:20 109639 dmsp_18_ephemeris_20120825.txt 22-Jun-2023 00:20 109753