Alias filter frequency if used.

Alias filter slope.

CDP ensemble number.

Trace number within CDP ensemble.

X coordinate of ensemble (CDP) position of this trace.

Y coordinate of ensemble (CDP) position of this trace.

Correlated: 1 = No 2 = Yes.

Coordinate units code: For previous four entries 1 = Length (meters or feet) 2 = Seconds of arc (In this case, the X values are longitude and the Y values are latitude.

Cross-line number, for 3D poststack data.

Day of year.

Delay recording time, time in ms between initiation time of energy source and time when recording of data samples begins (for deep water work if recording does not start at zero time)

Sample interval; in micro-seconds.

Device/Trace Identifier.

Data use: 1 = Production 2 = Test.

Energy source point number.

Field record number.

Gain type of field instruments code: 1 = Fixed 2 = Binary 3 = Floating point 4...N = optional use.

Gap size (total number of groups dropped)

Datum elevation at receiver group.

Receiver group elevation from sea level (above sea level is positive)

Geophone group number of last trace within original field record.

Geophone group number of trace one within original field record.

Geophone group number of roll switch position one.

Group static correction.

Uphole time at receiver group.

Water depth at receiver group.

X group coordinate.

Y group coordinate.

High cut frequncy if used.

High cut slope.

Hour of day (24 hour clock)

Instrument gain constant.

Instrument early or initial gain.

Inline-line number, for 3D poststack data.

Lag time A, time in ms between end of 240- byte trace identification header and time break, positive if time break occurs after end of header.

Lag time B, time in ms between the time break and the initiation time of the energy source.

Low cut frequency if used.

Low cut slope.

Minute of hour.

Mute timeend.

Mute timestart.

Number of horizontally summed traces (see SoVRSegyFileHeader.SoVRSegyFileHeader)

Notch filter frequency if used.

Notch filter slope.

Number of samples in this trace.

Number of vertically summed traces (see OIV.VolumeViz.Readers.SoVRSegyFileHeader.vscode)

Distance from source point to receiver group (negative if opposite to direction in which the line was shot)

Overtravel taper code: 1 = Down (or behind) 2 = Up (or ahead)

Scale factor for next 4 entries with value plus or minus 10 to the power 0, 1, 2, 3, or 4 (if positive, multiply, if negative divide)

Scale factor for previous 7 entries with value plus or minus 10 to the power 0, 1, 2, 3, or 4 (if positive, multiply, if negative divide)

Datum elevation at source.

Source depth (positive)

Second of minute.

Source elevation from sea level (above sea level is positive)

Sweep frequency at end.

Sweep frequency at start.

Shotpoint number, for 2D poststack data.

Scalar to be applied to shotPointNumber to give the real value.

Sweep length in ms.

Source static correction.

Sweep trace length at end in ms.

Sweep trace length at start in ms.

Sweep type code: 1 = Linear 2 = Cos-squared 3 = Other.

Uphole time at source.

Water depth at source.

Subweathering velocity.

X source coordinate.

Y source coordinate.

Taper type: 1=linear, 2=cos^2, 3=other.

Time basis code: 1 = Local 2 = GMT 3 = Other 4 = UTC.

Trace number within field record.

Trace sequence number within line.

Trace sequence number within reel.

Transduction Constant Mantissa.

Transduction Constant Power of ten.

Transduction Units 0 = Unknown 1 = Pascal (Pa) 2 = Volts (v) 3 = Millivolts (mV) 4 = Amperes (A) 5 = Meters (m) 6 = Meters per second (m/s) 7 = Meters per second squared (m/s2) 8 = Newton (N) 9 = Watt (W)

Trace identification code: 1 = Seismic data 2 = Dead 3 = Dummy 4 = Time break 5 = Uphole 6 = Sweep 7 = Timing 8 = Water break 9...N = optional use (N = 32,767)

Trace weighting factor, defined as 1/2^N volts for the least sigificant bit.

Scalar to be applied to - sut, gut, sstat, gstat, tstat, laga, lagb, delrt, muts, mute - header info to get the true time value in milliseconds.

Total static applied.

Trace value measurement unit 0 = Unknown 1 = Pascal (Pa) 2 = Volts (v) 3 = Millivolts (mV) 4 = Amperes (A) 5 = Meters (m) 6 = Meters per second (m/s) 7 = Meters per second squared (m/s2) 8 = Newton (N) 9 = Watt (W)

Unassigned.

Weathering velocity.

Year data recorded.