../ dmsp_15_ephemeris_20130304.txt 22-Jun-2023 00:21 108052 dmsp_16_ephemeris_20130304.txt 22-Jun-2023 00:21 108161 dmsp_17_ephemeris_20130304.txt 22-Jun-2023 00:21 108108 dmsp_18_ephemeris_20130304.txt 22-Jun-2023 00:21 108179