function?[ndata?]?=?RinexReader（?Root）
%UNtitleD?Summary?of?this?function?goes?here
%???Detailed?explanation?goes?here
fid=fopen（Root）;

header=0;???????????????????%跳過文件頭?初始化為0？-1？
while?1?????????????????
????header=header+1;
????line=fgetl（fid）;
????answer=strfind（line‘END?OF?HEADER‘）;
????if?~isempty（answer）
????????break;
????end
end
%?rline=fgetl（fid）;

ndata=struct（‘prn‘NaN‘year‘NaN‘month‘NaN‘day‘NaN‘hour‘NaN‘minute‘NaN‘second‘NaN‘af0‘NaN‘af1‘NaN‘af2‘NaN...????%導航電文參數結構體
‘aode‘NaN‘crs‘NaN‘dn‘NaN‘Manomaly‘NaN...
‘cuc‘NaN‘ecc‘NaN‘cus‘NaN‘art‘NaN...
‘toe‘NaN‘cic‘NaN‘om0‘NaN‘cis‘NaN...
‘i0‘NaN‘crc‘NaN‘w‘NaN‘omd‘NaN...
‘idt‘NaN‘cflg12‘NaN‘weekno‘NaN‘pflg12‘NaN...
‘svaccuracy‘NaN‘svhealth‘NaN‘tgd‘NaN‘