../ dmsp_15_ephemeris_20111015.txt 22-Jun-2023 00:18 109609 dmsp_16_ephemeris_20111015.txt 22-Jun-2023 00:18 109472 dmsp_17_ephemeris_20111015.txt 22-Jun-2023 00:18 109622 dmsp_18_ephemeris_20111015.txt 22-Jun-2023 00:18 109598