../ dmsp_15_ephemeris_20200407.txt 22-Jun-2023 00:43 108173 dmsp_16_ephemeris_20200407.txt 22-Jun-2023 00:43 108140 dmsp_17_ephemeris_20200407.txt 22-Jun-2023 00:43 108238 dmsp_18_ephemeris_20200407.txt 22-Jun-2023 00:43 108215