HexEdit - Window Binary File Editor

<?xml version="1.0"?>
<!DOCTYPE binary_file_format SYSTEM "BinaryFileFormat.dtd">
<binary_file_format name="SEG-Y file" type_name="" comment="Refer to &quot;Digital Tape Standards&quot; from the Society of Exploration Geophysicists" default_byte_order="big" default_read_only="false" default_char_set="ansi" allow_editing="false">
	<for name="EBCDIC_header_line" count="40" stop_test="" type_name="" comment="40 lines of text each of 80 EBCDIC characters"><data type="string" name="" format="ebcdic" len="80" display=""/></for><struct name="BINARY_header" type_name="" comment="400 bytes of binary values which describe s what is in the rest of the file (ie the traces).  The values are 16 or 32 bit big-endian numbers."><data type="int" name="JobId" format="unsigned" len="4" display="" comment="Job Identification Number"/><data type="int" name="LineNo" format="unsigned" len="4" display="" comment="Line Number"/><data type="int" name="ReelNo" format="unsigned" len="4" display="" comment="Reel Number"/><data type="int" name="NumTraces" format="unsigned" len="2" display="" comment="Number of data traces per record"/><data type="int" name="NumAuxTraces" format="unsigned" len="2" display="" comment="Number of auxiliary traces per record"/><data type="int" name="SampRate" format="unsigned" len="2" display="" comment="Sample interval in microseconds (for this data)" units="microsecs"/><data type="int" name="SampRateOrig" format="unsigned" len="2" display="" comment="Sample interval (for original field recording)" units="microsecs"/><data type="int" name="NumSamp" format="unsigned" len="2" display="" comment="Number of samples per trace (this data)"/><data type="int" name="NumSampOrig" format="unsigned" len="2" display="" comment="Number of samples per trace (original field data)"/><data type="int" name="FormatCode" format="unsigned" len="2" display="" comment="Sample format code 1 = IBM float (4 bytes), 2 = big-endian integer (4 bytes), 3 = big-endian integer (2 bytes), 4 = special int+gain format (4 bytes)" domain="this &gt;= 1 &amp;&amp; this &lt;= 4"/><data type="int" name="CDPFold" format="unsigned" len="2" display="" comment="Expected number of data traces per CDP ensemble."/><data type="int" name="SortCode" format="unsigned" len="2" domain="this &gt;= 1 &amp;&amp; this &lt;= 4" display="" comment="1 = as rcorded (no sorting), 2 = CDP ensemble, 3 = single fold continuous profile, 4 = horizontally stacked"/><data type="int" name="SumCode" format="unsigned" len="2" domain="this &gt; 0 &amp;&amp; this &lt; 32768" display="" comment="Vertical sum code.
1 = no sum, 2 = 2 sum, ... N = N sum"/><data type="int" name="SweepStart" format="unsigned" len="2" display="" comment="Sweep frequency at start"/><data type="int" name="SweepEnd" format="unsigned" len="2" display="" comment="Sweep frequency at end"/><data type="int" name="SweepLen" format="unsigned" len="2" display="" units="msec" comment="Sweep length"/><data type="int" name="SweepType" format="unsigned" len="2" domain="this &lt;= 4" display="" comment="Sweep type code: 1 = linear, 2 = parabolic, 3 = exponential, 4 = other"/><data type="int" name="TraceNum" format="unsigned" len="2" display="" comment="Trace number of sweep channel"/><data type="int" name="SweepStartTaper" format="unsigned" len="2" display="" units="msec" comment="Sweep trace taper length at start if tapered"/><data type="int" name="SweepEndTaper" format="unsigned" len="2" display="" units="msec" comment="Sweep trace taper length at end if tapered"/><data type="int" name="TaperType" format="unsigned" len="2" display="" comment="1 = linear, 2 = cos squared, 3 = other"/><data type="int" name="CorrCode" format="unsigned" len="2" domain="this &lt;= 2" display="" comment="Correlated data traces 1 = no, 2 = yes"/><data type="int" name="BinaryGain" format="unsigned" len="2" domain="this &lt;= 2" display="" comment="Binary gain recovered 1 = yes, 2 = no"/><data type="int" name="AmplitudeCode" format="unsigned" len="2" display="" comment="Amplitude recovery method: 1 = none, 2 = spherical divergence, 3 = AGC, 4 = other" domain="this &lt;= 4"/><data type="int" name="UnitsCode" format="unsigned" len="2" domain="this == 1 || this == 2" display="" comment="Measurement system: 1 = meters, 2 = feet"/><data type="int" name="ImpulseCode" format="unsigned" len="2" domain="this &lt;= 2" display="" comment="Impulse signal polarity: 1 = increase in pressure or upward geophone case  movement gives negative number on tape, 2 = increase in pressure or upward geophone case movement gives positive number on tape
"/><data type="int" name="VibeCode" format="unsigned" len="2" domain="this &lt;= 8" display="" comment="Vibratory polarity code."/><data type="none" name="Unassigned" len="340" comment="For optional information"/></struct><for name="Trace" count="" stop_test="" type_name="" comment=""><struct name="" type_name="" comment=""><struct name="Header" type_name="" comment="Trace header (240 bytes)"><data type="int" name="TraceNum" format="unsigned" len="4" display="" comment="Trace sequence number within the line"/><data type="int" name="TraceNumReel" format="unsigned" len="4" display="" comment="Trace sequence number within this reel"/><data type="int" name="FFID" format="signed" len="4" display="" comment="Original field record number"/><data type="int" name="TraceNumOrig" format="unsigned" len="4" display="" comment="Trace number within the original field record"/><data type="int" name="PointNum" format="unsigned" len="4" display=""/><data type="int" name="CDPEnsemble" format="unsigned" len="4" display=""/><data type="int" name="TraceCDP" format="unsigned" len="4" display=""/><data type="int" name="TraceId" format="unsigned" len="2" display="" comment="Trace identification code"/><data type="none" name="TBD1" len="42"/><data type="int" name="CoordX" format="signed" len="4" display="" comment="Source coordinate X"/><data type="int" name="CoordY" format="signed" len="4" display="" comment="Source coordinate Y"/><data type="int" name="GroupCoordX" format="signed" len="4" display=""/><data type="int" name="GroupCoordY" format="signed" len="4" display=""/><data type="int" name="CoordUnits" format="unsigned" len="2" display="" comment="1 = length (meters or feet), 2 = seconds of arc (lat/long)" domain="this &lt;= 2"/><data type="none" name="TBD2" len="24"/><data type="int" name="NumSamp" format="unsigned" len="2" display="" comment="Number of samples in this trace"/><data type="int" name="SampRate" format="unsigned" len="2" display="" units="microsecs" comment="Sample interval for this trace"/><data type="none" name="TBD3" len="62"/><data type="none" name="Unassigned" len="60"/></struct><for name="Sample" count="BINARY_header.NumSamp" stop_test="" type_name="" comment=""><data type="none" name="" len="BINARY_header.FormatCode == 2 ? 2 : 4" comment="Sample size depends on the Format Code:
1 = 4 bytes (IBM float)
2 = 2 bytes (big-endian integer)
3 = 4 bytes (big-endian integer)
4 = 4 bytes (special format integer with gain)"/></for></struct></for></binary_file_format>