../ dmsp_15_ephemeris_20180331.txt 22-Jun-2023 16:27 108214 dmsp_16_ephemeris_20180331.txt 22-Jun-2023 16:27 108175 dmsp_17_ephemeris_20180331.txt 22-Jun-2023 16:27 108232 dmsp_18_ephemeris_20180331.txt 22-Jun-2023 16:27 108212