rdsac.rar_SAC文件读取_rdsac_sac_天然地震_读取sac

function sac = rdsac(varargin) format long; varargin{1}; % % % % fnn=cell2mat(varargin{1}); fid=fopen(varargin{1},'r');%打开SAC文件垂直向 % % % % fid=fopen(varargin,'r');%打开SAC文件垂直向 %读文件1－70为浮点数32位 %[delta,count]=fread(fid,70,'float32') %读文件71－111为长整数32位 %[delta,count]=fread(fid,40,'int32') %以下为字符，每个8位 %[delta,count]=fread(fid,8,'uchar') %Name: sac.h %Purpose: structure for header of a SAC (Seismic Analysis Code) data file %Notes: Key to comment flags describing each field: % Column 1: % R = required by SAC % = (blank) optional % Column 2: % A = settable from a priori knowledge % D = available in data % F = available in or derivable from SEED fixed data header % T = available in SEED header tables % = (blank) not directly available from SEED data, header % tables, or elsewhere sac.delta=fread(fid,1,'float32'); % RF time increment, sec */ sac.depmin=fread(fid,1,'float32'); % minimum amplitude */ sac.depmax=fread(fid,1,'float32'); % maximum amplitude */ sac.scale=fread(fid,1,'float32'); % amplitude scale factor */ sac.odelta=fread(fid,1,'float32'); % observed time inc */ sac.b=fread(fid,1,'float32'); % RD initial value, ampl. */ sac.e=fread(fid,1,'float32'); % RD final value, amplitude */ sac.o=fread(fid,1,'float32'); % event start, sec > 0 */ sac.a=fread(fid,1,'float32'); % 1st arrival time */ sac.internal1=fread(fid,1,'float32'); % internal use */ sac.t0=fread(fid,1,'float32'); % user-defined time pick */ sac.t1=fread(fid,1,'float32'); % user-defined time pick */ sac.t2=fread(fid,1,'float32'); % user-defined time pick */ sac.t3=fread(fid,1,'float32'); % user-defined time pick */ sac.t4=fread(fid,1,'float32'); % user-defined time pick */ sac.t5=fread(fid,1,'float32'); % user-defined time pick */ sac.t6=fread(fid,1,'float32'); % user-defined time pick */ sac.t7=fread(fid,1,'float32'); % user-defined time pick */ sac.t8=fread(fid,1,'float32'); % user-defined time pick */ sac.t9=fread(fid,1,'float32'); % user-defined time pick */ sac.f=fread(fid,1,'float32'); % event end, sec > 0 */ sac.resp0=fread(fid,1,'float32'); % instrument respnse parm*/ sac.resp1=fread(fid,1,'float32'); % instrument respnse parm*/ sac.resp2=fread(fid,1,'float32'); % instrument respnse parm*/ sac.resp3=fread(fid,1,'float32'); % instrument respnse parm*/ sac.resp4=fread(fid,1,'float32'); % instrument respnse parm*/ sac.resp5=fread(fid,1,'float32'); % instrument respnse parm*/ sac.resp6=fread(fid,1,'float32'); % instrument respnse parm*/ sac.resp7=fread(fid,1,'float32'); % instrument respnse parm*/ sac.resp8=fread(fid,1,'float32'); % instrument respnse parm*/ sac.resp9=fread(fid,1,'float32');% instrument respnse parm*/ sac.stla=fread(fid,1,'float32');% T station latititude */ sac.stlo=fread(fid,1,'float32');% T station longitude */ sac.stel=fread(fid,1,'float32');% T station elevation, m */ sac.stdp=fread(fid,1,'float32');% T station depth, m */ sac.evla=fread(fid,1,'float32');% event latitude */ sac.evlo=fread(fid,1,'float32');% event longitude */ sac.evel=fread(fid,1,'float32');% event elevation */ sac.evdp=fread(fid,1,'float32');% event depth */ sac.unused1=fread(fid,1,'float32');% reserved for future use*/ sac.user0=fread(fid,1,'float32');% available to user */ sac.user1=fread(fid,1,'float32');% available to user */ sac.user2=fread(fid,1,'float32');% available to user */ sac.user3=fread(fid,1,'float32');% available to user */ sac.user4=fread(fid,1,'float32');% available to user */ sac.user5=fread(fid,1,'float32');% available to user */ sac.user6=fread(fid,1,'float32');% available to user */ sac.user7=fread(fid,1,'float32');% available to user */ sac.user8=fread(fid,1,'float32');% available to user */ sac.user9=fread(fid,1,'float32');% available to user */ sac.dist=fread(fid,1,'float32');% stn-event distance, km */ sac.az=fread(fid,1,'float32');% event-stn azimuth */ sac.baz=fread(fid,1,'float32');% stn-event azimuth */ sac.gcarc=fread(fid,1,'float32');% stn-event dist, degrees*/ sac.internal2=fread(fid,1,'float32');% internal use */ sac.internal3=fread(fid,1,'float32');% internal use */ sac.depmen=fread(fid,1,'float32');% mean value, amplitude */ sac.cmpaz=fread(fid,1,'float32');% T component azimuth */ sac.cmpinc=fread(fid,1,'float32');% T component inclination */ sac.unused2=fread(fid,1,'float32');% reserved for future use*/ sac.unused3=fread(fid,1,'float32');% reserved for future use*/ sac.unused4=fread(fid,1,'float32');% reserved for future use*/ sac.unused5=fread(fid,1,'float32');% reserved for future use*/ sac.unused6=fread(fid,1,'float32');% reserved for future use*/ sac.unused7=fread(fid,1,'float32');% reserved for future use*/ sac.unused8=fread(fid,1,'float32');% reserved for future use*/ sac.unused9=fread(fid,1,'float32');% reserved for future use*/ sac.unused10=fread(fid,1,'float32');% reserved for future use*/ sac.unused11=fread(fid,1,'float32');% reserved for future use*/ sac.unused12=fread(fid,1,'float32');% reserved for future use*/ sac.nzyear=fread(fid,1,'int32');% F zero time of file, yr sac.nzjday=fread(fid,1,'int32');% F zero time of file, da sac.nzhour=fread(fid,1,'int32');% F zero time of file, hr sac.nzmin=fread(fid,1,'int32');% F zero time of file, mi sac.nzsec=fread(fid,1,'int32');% F zero time of file, se sac.nzmsec=fread(fid,1,'int32');% F zero time of file, ms sac.internal4=fread(fid,1,'int32');% internal use */ sac.internal5=fread(fid,1,'int32');% internal use */ sac.internal6=fread(fid,1,'int32');% internal use */ sac.npts=fread(fid,1,'int32');% RF number of samples */ sac.internal7=fread(fid,1,'int32');% internal use */ sac.internal8=fread(fid,1,'int32');% internal use */ sac.unused13=fread(fid,1,'int32');% reserved for future use*/ sac.unused14=fread(fid,1,'int32');% reserved for future use*/ sac.unused15=fread(fid,1,'int32');% reserved for future use*/ sac.iftype=fread(fid,1,'int32');% RA type of file */ sac.idep=fread(fid,1,'int32');% type of amplitude */ sac.iztype=fread(fid,1,'int32');% zero time equivalence */ sac.unused16=fread(fid,1,'int32');% reserved for future use*/ sac.iinst=fread(fid,1,'int32');% recording instrument */ sac.istreg=fread(fid,1,'int32');% stn geographic region */ sac.ievreg=fread(fid,1,'int32');% event geographic region*/ sac.ievtyp=fread(fid,1,'int32');% event type */ sac.iqual=fread(fid,1,'int32');% quality of data */ sac.isynth=fread(fid,1,'int32');% synthetic data flag */ sac.unused17=fread(fid,1,'int32');% reserved for future use*/ sac.unused18=fread(fid,1,'int32');% reserved for future use*/ sac.unused19=fread(fid,1,'int32');% reserved for future use*/ sac.unused20=fread(fid,1,'int32');% reserved for future use*/ sac.unused21=fread(fid,1,'int32');% reserved for future use*/ sac.unused22=fread(fid,1,'int32');% reserved for future use*/ sac.unused23=fread(fid,1,'int32');% reserved for future use*/ sac.unused24=fread(fid,1,'int32');% reserved for future use*/ sac.unused25