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PutSegyTrace.m
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PutSegyTrace.m
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% PutSegyTrace(segyid,tracedata,SegyTraceHeader,SegyHeader)
% Write a SegyTrace to a filehandle 'segyid'
%
% (C) 2001-2012, Thomas Mejer Hansen, thomas.mejer.hansen@gmail.com
%
%
% This program is free software; you can redistribute it and/or modify
% it under the terms of the GNU General Public License as published by
% the Free Software Foundation; either version 2 of the License, or
% (at your option) any later version.
%
% This program is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
% GNU General Public License for more details.
%
% You should have received a copy of the GNU General Public License
% along with this program; if not, write to the Free Software
% Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
%
function PutSegyTrace(segyid,tracedata,SegyTraceHeader,SegyHeader);
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% WRITE SegyTraceHeader
if ~exist('TraceStart')==1, TraceStart=ftell(segyid);end
WRITETRACEHEADER=1;
if WRITETRACEHEADER==1,
fseek(segyid,0,'bof');
fseek(segyid,TraceStart,'bof');
fwrite(segyid,SegyTraceHeader.TraceSequenceLine,'int32'); % 0
fwrite(segyid,SegyTraceHeader.TraceSequenceFile,'int32'); % 4
fwrite(segyid,SegyTraceHeader.FieldRecord,'int32'); % 8
fwrite(segyid,SegyTraceHeader.TraceNumber,'int32'); % 12
fwrite(segyid,SegyTraceHeader.EnergySourcePoint,'int32'); % 16
fwrite(segyid,SegyTraceHeader.cdp,'int32'); % 20
fwrite(segyid,SegyTraceHeader.cdpTrace,'int32'); % 24
fwrite(segyid,SegyTraceHeader.TraceIdentifactionCode,'int16'); % 28
fwrite(segyid,SegyTraceHeader.NSummedTraces,'int16'); % 30
fwrite(segyid,SegyTraceHeader.NStackedTraces,'int16'); % 32
fwrite(segyid,SegyTraceHeader.DataUse,'int16'); % 34
fwrite(segyid,SegyTraceHeader.offset,'int32'); %36
fwrite(segyid,SegyTraceHeader.ReceiverGroupElevation,'int32'); %40
fwrite(segyid,SegyTraceHeader.SourceSurfaceElevation,'int32'); %44
fwrite(segyid,SegyTraceHeader.SourceDepth,'int32'); %48
fwrite(segyid,SegyTraceHeader.ReceiverDatumElevation,'int32'); %52
fwrite(segyid,SegyTraceHeader.SourceDatumElevation,'int32'); %56
fwrite(segyid,SegyTraceHeader.SourceWaterDepth,'int32'); %60
fwrite(segyid,SegyTraceHeader.GroupWaterDepth,'int32'); %64
fwrite(segyid,SegyTraceHeader.ElevationScalar,'int16'); %68
% Multiply/divide next number for following 4 values
fwrite(segyid,SegyTraceHeader.SourceGroupScalar,'int16'); %70
fwrite(segyid,SegyTraceHeader.SourceX,'int32'); %72
fwrite(segyid,SegyTraceHeader.SourceY,'int32'); %76
fwrite(segyid,SegyTraceHeader.GroupX,'int32'); %80
fwrite(segyid,SegyTraceHeader.GroupY,'int32'); %84
fwrite(segyid,SegyTraceHeader.CoordinateUnits,'int16'); %88
fwrite(segyid,SegyTraceHeader.WeatheringVelocity,'int16'); %90
fwrite(segyid,SegyTraceHeader.SubWeatheringVelocity,'int16'); %92
fwrite(segyid,SegyTraceHeader.SourceUpholeTime,'int16'); %94
fwrite(segyid,SegyTraceHeader.GroupUpholeTime,'int16'); %96
fwrite(segyid,SegyTraceHeader.SourceStaticCorrection,'int16'); %98
fwrite(segyid,SegyTraceHeader.GroupStaticCorrection,'int16'); %100
fwrite(segyid,SegyTraceHeader.TotalStaticApplied,'int16'); %102
fwrite(segyid,SegyTraceHeader.LagTimeA,'int16'); %104
fwrite(segyid,SegyTraceHeader.LagTimeB,'int16'); %106
fwrite(segyid,SegyTraceHeader.DelayRecordingTime,'int16'); %108
fwrite(segyid,SegyTraceHeader.MuteTimeStart,'int16'); %110
fwrite(segyid,SegyTraceHeader.MuteTimeEND,'int16'); %112
fwrite(segyid,SegyTraceHeader.ns,'uint16'); %114
fwrite(segyid,SegyTraceHeader.dt,'uint16'); %116
fwrite(segyid,SegyTraceHeader.GainType,'int16'); %118
fwrite(segyid,SegyTraceHeader.InstrumentGainConstant,'int16'); %120
fwrite(segyid,SegyTraceHeader.InstrumentInitialGain,'int16'); %%122
fwrite(segyid,SegyTraceHeader.Correlated,'int16'); %124
fwrite(segyid,SegyTraceHeader.SweepFrequenceStart,'int16'); %126
fwrite(segyid,SegyTraceHeader.SweepFrequenceEnd,'int16'); %128
fwrite(segyid,SegyTraceHeader.SweepLength,'int16'); %130
fwrite(segyid,SegyTraceHeader.SweepType,'int16'); %132
fwrite(segyid,SegyTraceHeader.SweepTraceTaperLengthStart,'int16'); %134
fwrite(segyid,SegyTraceHeader.SweepTraceTaperLengthEnd,'int16'); %136
fwrite(segyid,SegyTraceHeader.TaperType,'int16'); %138
fwrite(segyid,SegyTraceHeader.AliasFilterFrequency,'int16'); %140
fwrite(segyid,SegyTraceHeader.AliasFilterSlope,'int16'); %142
fwrite(segyid,SegyTraceHeader.NotchFilterFrequency,'int16'); %144
fwrite(segyid,SegyTraceHeader.NotchFilterSlope,'int16'); %146
fwrite(segyid,SegyTraceHeader.LowCutFrequency,'int16'); %148
fwrite(segyid,SegyTraceHeader.HighCutFrequency,'int16'); %150
fwrite(segyid,SegyTraceHeader.LowCutSlope,'int16'); %152
fwrite(segyid,SegyTraceHeader.HighCutSlope,'int16'); %154
fwrite(segyid,SegyTraceHeader.YearDataRecorded,'int16'); %156
fwrite(segyid,SegyTraceHeader.DayOfYear,'int16'); %158
fwrite(segyid,SegyTraceHeader.HourOfDay,'int16'); %160
fwrite(segyid,SegyTraceHeader.MinuteOfHour,'int16'); %162
fwrite(segyid,SegyTraceHeader.SecondOfMinute,'int16'); %164
fwrite(segyid,SegyTraceHeader.TimeBaseCode,'int16'); %166
fwrite(segyid,SegyTraceHeader.TraceWeightningFactor,'int16'); %170
fwrite(segyid,SegyTraceHeader.GeophoneGroupNumberRoll1,'int16'); %172
fwrite(segyid,SegyTraceHeader.GeophoneGroupNumberFirstTraceOrigField,'int16'); %174
fwrite(segyid,SegyTraceHeader.GeophoneGroupNumberLastTraceOrigField,'int16'); %176
fwrite(segyid,SegyTraceHeader.GapSize,'int16'); %178
fwrite(segyid,SegyTraceHeader.OverTravel,'int16'); %178
fwrite(segyid,SegyTraceHeader.cdpX,'int32'); %180
fwrite(segyid,SegyTraceHeader.cdpY,'int32'); %184
fwrite(segyid,SegyTraceHeader.Inline3D,'int32'); %188
fwrite(segyid,SegyTraceHeader.Crossline3D,'int32'); %192
fwrite(segyid,SegyTraceHeader.ShotPoint,'int32'); %196
fwrite(segyid,SegyTraceHeader.ShotPointScalar,'int16'); %200
fwrite(segyid,SegyTraceHeader.TraceValueMeasurementUnit,'int16'); %202
fwrite(segyid,SegyTraceHeader.TransductionConstantMantissa,'int32'); %204
fwrite(segyid,SegyTraceHeader.TransductionConstantPower,'int16'); %208
fwrite(segyid,SegyTraceHeader.TransductionUnit,'int16'); %210
fwrite(segyid,SegyTraceHeader.TraceIdentifier,'int16'); %212
fwrite(segyid,SegyTraceHeader.ScalarTraceHeader,'int16'); %214
fwrite(segyid,SegyTraceHeader.SourceType,'int16'); %216
fwrite(segyid,SegyTraceHeader.SourceEnergyDirectionMantissa,'int32'); %218
fwrite(segyid,SegyTraceHeader.SourceEnergyDirectionExponent,'int16'); %222
fwrite(segyid,SegyTraceHeader.SourceMeasurementMantissa,'int32'); %224
fwrite(segyid,SegyTraceHeader.SourceMeasurementExponent,'int16'); %228
fwrite(segyid,SegyTraceHeader.SourceMeasurementUnit,'int16'); %230
% WRITE UNASSIGNED CHARACTERS FOR THE REST
fwrite(segyid,SegyTraceHeader.UnassignedInt1,'int32'); %232
fwrite(segyid,SegyTraceHeader.UnassignedInt2,'int32'); %236
end
Revision=SegyHeader.SegyFormatRevisionNumber;
if Revision>0, Revision=1; end
Format=SegyHeader.Rev(Revision+1).DataSampleFormat(SegyHeader.DataSampleFormat).format;
BPS=SegyHeader.Rev(Revision+1).DataSampleFormat(SegyHeader.DataSampleFormat).bps;
SegymatVerbose([mfilename,' SegyRevision ',sprintf('%0.4g',Revision),', ',Format],3);
%% WRITE TRACE DATA;
if (strcmp(Format,'uint32')==1)|(strcmp(Format,'uint16')==1), % IBM FLOATING POINT
% CONVERT FROM FLOATING POINT
SegymatVerbose([mfilename,'Converting from IBM, DataFormat :',SegyHeader.DataSampleFormat],2);
tracedata=double(num2ibm(tracedata));
end;
if SegyHeader.FixedLengthTraceFlag
fwrite(segyid,tracedata,Format);
else
fwrite(segyid,tracedata(1:SegyTraceHeader.ns),Format);
end