../ dmsp_15_ephemeris_20130630.txt 22-Jun-2023 00:22 109504 dmsp_16_ephemeris_20130630.txt 22-Jun-2023 00:22 109609 dmsp_17_ephemeris_20130630.txt 22-Jun-2023 00:22 109716 dmsp_18_ephemeris_20130630.txt 22-Jun-2023 00:22 109601