readobsfilehead.m

差分载波定位

function [approxPos, obsTypeNum] = readObsFileHead(obsFile,fid)
% clear all;
% obsFile = 'rawdata\1lsu2200.03o';
head_lines = 0;
approxPos.X = 0;
approxPos.Y = 0;
approxPos.Z = 0;

while 1  % 读取文件头中的信息
   answer = 0;
   head_lines = head_lines+1;
   line = fgetl(fid);
   answer = findstr(line,'APPROX POSITION XYZ');
   if (answer~=0)%接收机概略坐标
       approxPos.X = str2num(line(3:14));
       approxPos.Y = str2num(line(16:28));   
       approxPos.Z = str2num(line(30:42));
       
   end
   answer = 0;   
   answer = findstr(line,'# / TYPES OF OBSERV');
   if (answer~=0)%观测值类型
       obsTypeNum = str2num(line(6));
       for i = 1:obsTypeNum
           obsTypes(1,2*i-1:2*i) = line(5+6*i:6+6*i);   
       end

   end
   answer = 0;
   answer = findstr(line,'END OF HEADER');
   if (answer~=0)
       break;
   end
end;