GLONASS 四星定位

function glo_eph = rinex_nav_to_eph_GLO(rinex_nav_file) %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % wxd 20100328 读取rinex文件 % function rinex_nav_to_eph(rinex_nav_file,eph_file) % % This function reads in a standard RINEX ephemeris file and converts % % it to the standard binary eph format for ephemeris data. % % % % Input parameters: % % rinex_nav_file: The name of the file containing the RINEx data % % eph_file: the desired name of the binary output eph file % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% format long; check = 0;EOH = 0; fin = fopen(rinex_nav_file,'rt'); prn_vec=zeros(32,1); max_vec=zeros(32,1); min_vec=ones(32,1)*999999; eph_array = []; if fin<0 disp(sprintf('Error opening RINEX nav file %s',rinex_nav_file)) else %% section to avoid the header information %% while EOH == 0 nextline = fgetl(fin); headline = sscanf(nextline,'%s'); check = strmatch('ENDOFHEADER',headline,'exact'); if length(check)>0 if check == 1 EOH = 1; end end end i = 0; while feof(fin) == 0 i = i+1; nextline_1 = fgetl(fin); %line_1 = sscanf(nextline_1,'%e'); line_1 = get_data_from_line(nextline_1); nextline_2 = fgetl(fin); %line_2 = sscanf(nextline_2,'%e'); line_2 = get_data_from_line(nextline_2); nextline_3 = fgetl(fin); %line_3 = sscanf(nextline_3,'%e'); line_3 = get_data_from_line(nextline_3); nextline_4 = fgetl(fin); %line_4 = sscanf(nextline_4,'%e'); line_4 = get_data_from_line(nextline_4); toc = line_1(10); glo_eph(i).toc = toc; glo_eph(i).x = line_2(1)*1000; glo_eph(i).xv = line_2(2)*1000; glo_eph(i).xa = line_2(3)*1000; glo_eph(i).y = line_3(1)*1000; glo_eph(i).yv = line_3(2)*1000; glo_eph(i).ya = line_3(3)*1000; glo_eph(i).z = line_4(1)*1000; glo_eph(i).zv = line_4(2)*1000; glo_eph(i).za = line_4(3)*1000; glo_eph(i).tau = line_1(8); glo_eph(i).delta_tau = line_1(9); end end