../ dmsp_15_ephemeris_20110723.txt 22-Jun-2023 00:18 109552 dmsp_16_ephemeris_20110723.txt 22-Jun-2023 00:18 109647 dmsp_17_ephemeris_20110723.txt 22-Jun-2023 00:18 109641 dmsp_18_ephemeris_20110723.txt 22-Jun-2023 00:18 109693