../ dmsp_15_ephemeris_20171007.txt 22-Jun-2023 00:35 109734 dmsp_16_ephemeris_20171007.txt 22-Jun-2023 00:35 109649 dmsp_17_ephemeris_20171007.txt 22-Jun-2023 00:35 109571 dmsp_18_ephemeris_20171007.txt 22-Jun-2023 00:35 109598