../ dmsp_15_ephemeris_20180407.txt 22-Jun-2023 00:37 108106 dmsp_16_ephemeris_20180407.txt 22-Jun-2023 00:37 108150 dmsp_17_ephemeris_20180407.txt 22-Jun-2023 00:37 108121 dmsp_18_ephemeris_20180407.txt 22-Jun-2023 00:37 108181