../ dmsp_15_ephemeris_20110816.txt 22-Jun-2023 00:18 109609 dmsp_16_ephemeris_20110816.txt 22-Jun-2023 00:18 109743 dmsp_17_ephemeris_20110816.txt 22-Jun-2023 00:18 109686 dmsp_18_ephemeris_20110816.txt 22-Jun-2023 00:18 109637