matlab学习.rar_GPS_GPS 定位 MATLAB_gps 原理 matlab_gps定位matlab

%EASY2 Convert observation time into sow. % We read the corresponding RINEX navigation file % and reformat the data into the Matlab matrix Eph. % For given SV we find the corresponding column in Eph % and call the basic satpos function % Compute sow for first epoch in observation file xbgd173A.16o % 2016 6 21 6 44 16.0000000 clear all; jd = julday(2016,6,21,6+44/60); [week,sow] = gps_time(jd); % Read RINEX ephemerides星历表 file and convert to % internal Matlab format Eph =rinexe('brdm1730.16p','eph.dat');%星历表，输出文件 % We identify the observed satellites in line 29 of RINEX file brdm1730.16p svs = [1 2 3 4 5 6 7 8 9 10 11 12 14 15]; %卫星号 for t = 1:length(svs) col_Eph(t) = find_eph(Eph,svs(t),sow); sat(1:3,t) = satpos(sow,Eph(:,col_Eph(t))); %由星历计算ECEF卫星位置 end sat % position of svs in ECEF system %%%%%%%%%%%%%%%%%%%%% end easy2.m %%%%%%%%%%%%%%%