Manual Sei See Doc

8/21/2019 Manual Sei See Doc

http://slidepdf.com/reader/full/manual-sei-see-doc 1/67

SeiSee (2.22)

User’s Manual[1]

Contents

Contents

Introduction

Starting the program

Using the program

Open SEG-Y (SU) or CST file

Open Director !ro"ser panelOpen file in #eco$er mode (SEG-Y onl)

Selection of traces to %e displaed

Trace selection by trace number or header item value

Trace selection by expressionTrace Sorting

Sa$ing data to SEG-Y or C&'SU file

Sa$e trace(s) sample and header $alues to tet file

Eport trace headers $alues to the tet file

Import trace header $alues from tet file

Toggling *+ppl Dela #ecording Time, mode

Displa mode selection

“ Display mode” and “Wiggle Fill” panels“ Colors” panel

Color mode palette setupScaling and gain setup

Scale panelDirection panelChange scale and gain by mouse wheel

Direction panelZoom buttons

De!ault Seismic "iew #arametersSeismic "indo"

$xes labeling setupScrolling the seismic image

Trace selectionDispla. edit headers and data

Trace /eaders "indo"

%eader &tems browsing

Custom header items creation' race Searching

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Trace header editing

Single trace header item modi!ication

Trace headers changing by expression/ardcop "indo"

()*+,- ./012+3)4.5678902, ./012+3)4.5 8):8;.7. < =02;+,) Windows >itmap ? bmp @'rocessing

#rocessing parameters setup

#rocessing panel>and pass !ilter

$utomatic gain control ?$AC@&nversion

'o"er Spectrum "indo"

+ppendices

EpressionsSpecial variables and header item value !unctionBxpression SyntaxBxprBval &nternal Functions ?by >rian $ "anderburg &&@

BxprBval &nternal Constants$pplication &nternal Functions

$pplication &nternal Constants$pplication &nternal "ariables

Trace $alue. gain and $ie" on screen

Simplified SEG-Y file structure

SUC&' files






















































Introduction

SeiSee program shows seismic data in SBAE CW#SGE CAA CST !ormatson screen o! your personal computer ?WindowsHIIIE J#E "ista WindowsKE

LE MinuxNWine@#rogram !eaturesO

− standard integer ?HEP bytes@ and &>Q !loat ?P bytes@ sample !ormats

support

− nonstandard integer?R byte@E !loat &BBB ?P bytes@ sample !ormatsH

− CAA Aeovecteur disU SBA !ormat ?dat@

− various seismic display modes ?wiggleE variable areaE variabledensityE color@

− importexport color palettes to text !ile

− scaling seismic imageE gain controlE axes labeling setup

− plot seismic to printer ?plotter@

− image export in Windows >itmap ?bmp@ and #ostScript !ormats

− SBA trace headers display ?!ormats &ntegerVREVHEVPE &BBB

FloatVPEVLE &>Q FloatVP are supported@

− search trace by header item value

− data samples browsing

− text header and binary editor

− band pass !ilterE automatic gain control ?$AC@

− headers consistency checU

− write whole SBA !ile or part o! it to disU in SBA ?&>QH&BBB@ or CW#SG !ormat with ability to select data on base o!

trace index or trace header value or trace header expression and giventime intervalX reversal trace order is also supported #rocessing

parameters can be applied to recorded data ?!ilterE $AC etc@

− export trace?s@ sample and header values to text !ile

− import trace headers values !rom text !ile

− trace shi!t according with “Delay Yecording Time” trace header

value





− selection o! traces to be displayed by trace index or header value and

by expression

− trace headers change by means expressions

− trace sorting− open and !ix !iles containing wrong data in binary header ?Yecovery

Qode@

− single trace header item editing

− disc directory browsing

− power spectrum calculation and display



Starting the program

Double clicU program icon by mouseO

Qain window will be shown

Gse button to toggle controls panel visibilityE and !or directory

browser

Command line startup mode is also supported Gse !irst parameter to speci!ya SBA !ile name



€

Using the program

Open S!"# (SU) or CS$ %ile

Select menu “File” → “pen”E or press buttonO

Standard “pen” dialog appears Gse it !or to select !ile that you want to browse

Select menu “File” → “Yeopen” to open one o! previously opened !iles



Open &irector' roser panel

Select “File”→

“pen Directory” menu Standard “pen” dialog appearsGse it !or directory selectionE then select any !ile in it and press “pen”

button

The >rowser panel will be shownO

?nly “valid” SBAE CW#SG and CST !iles will be listed@

To display SBA !ile [ust select it in the list by mouse

The panel buttonsO

Yeturn to the previous directory

Ye!resh directory list

pen directory selection dialog



Open %ile in *eco+er' mode (S!"# onl')

&! !ile has wrong values in “Sample &nterval”E “\umber samples per datatrace !or reel” .]. “Data Sample Code” items o! the binary headerE the

program opens !ile in Yecovery Qode nly text and binary header will beread &t is necessary to !ix the values and reopen the !ile again



Selection o% traces to ,e displa'ed

To change the parameters choose “File”→

“Trace Selection” menuE or press button

$race selection ,' trace num,er or header item +alue

Choose “>y \umber” tabE then !ill in selection parameters !orm and press

“Select” buttonE a!ter this the program will start trace selection When it isdoneE press “^” button to display selected data or “Cancel button” to

discard the selection



$race selection ,' e-pression

Select “>y Bxpression” tabE then enter expression textE and press “Select”

buttonE a!ter this the program will start trace selection Bxpression syntax isdescribed in the “Bxpressions” appendix When it is doneE press “^”

button to display selected data or “Cancel button” to discard the selection



$race Sorting

To setup sorting select menu “File” → “Trace Sort”E or press button

The dialog has two lists “Selected %eaders” list contains trace header itemnames that will be used !or sortingE and “$vailable %eaders” list holds all

trace headers

%eader order in the “Selected %eaders” list corresponds precedence o! usingthem in sorting



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Control Description

$dd selected header item !rom $vailable %eaders to Selected

%eaders list

Yemove selected header item !rom Selected %eaders list

Clear Selected %eaders list

Qove selected header item in Selected %eaders Gp

Qove selected header item in Selected %eaders Down

To select sort mode checU suitable item in “Sort Qode” panel

Control Description

\o \o sorting

$scending $scending sorting

Descending Descending sorting

To apply selected modeE press “Sort” buttonE and then press “^” When sorting is active the “Sort” marU is shown in status barO



Sa+ing data to S!"# or C/0SU %ile

To save !ile select “File” → “Save $s ” menu item or press button

&t is possible to save all trace or part o! them Fill selection parameters in thedialog Selection parameters are the same as described in “Selection o!

traces to be displayed” chapter

ChecU “Yeversal order” checUbox to save traces in reversal order ChecU “$pply #rocessing” to save data with processing applied

Then press “Save” button When standard “File Save” dialog appearsE use it

to speci!y output !ile “Close” button discards dialog



Then press “Save” button When standard “File Save” dialog appearsE use it

to speci!y type and name o! output !ile “Close” button discards dialog

The !ollowing data !ormats are supported SBA f &>QFM$TH samples

SBA f &BBBFM$TH samples

CW#SG



Sa+e trace(s) sample and header +alues to te-t %ile

#rocedure is same as !or Saving SBA !ileE except you need to set“'2+8) Samples Text File” !ile type

To save trace header values together with trace data checU “&nclude %eaders?txt@” checUbox



-port trace headers +alues to the te-t %ile

To export select the !ollowing menu itemsO

“File”→ “Bxport Trace %eaders to $SC&& !ile”

ChecU “Write Column in!o” i! column in!ormation is needed

#ress “Save” to start export %eader values that are selected in the “Trace

%eaders” window will be exported to output !ile

%ere is structure o! the output !ileO

P 0 F 0 Trace index in file

P 9 F 4 * FFID - Original field record number

P 17 F 4 SP - Energ !ource "oin# numberP $1 F 4 %DP en!emble number

P$&7 F14 'e( I#em 1

E)P SP from %DP +

,----------,----------,----------,----------,----------,----------

1 . 1100 1.19 0/$. 0

$ . 1100 1.$0 0/. 0/.

& . 1100 1.$1 0/7. 1

4 . 1100 1.$$ 1 1/.

. . 1100 1.$& 1/$. $

. 1100 1.$4 1/. $/.



$t the beginning o! the !ile column in!ormation will be recorded

?i! “Write Column &n!o” is checUed@O

#osition Contents DescriptionR P #nnn

or

BJ#Y

nnn f number that shows byte position o! header item

i! value is expression

space

L Fnn

or

three spaces

nn f number !or the appropriate !ormat

i! value is expression

space

RI text header item description

The next line is column in!o terminator f line that starts with “N” character

%eader item values will be placed a!ter this line

First column contains ordinal number o! the trace ?as it is in !ileE starting!rom R@ The !ollowing columns contain header values



Import trace header +alues %rom te-t %ile

File to be imported should be in the same !ormat as exported !ile To import header values !rom !ile select the !ollowing menuO

“File”→ “&mport Trace %eaders !rom $SC&& !ile”

#ress “Moad” to start import

Select input !ile and press “pen”

$oggling ppl' &ela' *ecording $ime3 mode



Sometimes time o! !irst trace sample is de!ined by “Delay Yecording Time”trace header value &t is necessary to switchon “$pply Yecording Delay

%eader” to display seismic line with such traces properly While worUing inthis mode you can note some !ile opening delayE especially i! !ile sije i! big

&! you are sure that traces in current !ile are not shi!ted than you can togglethis mode o!!

To toggle the mode select “File” → “$pply Yecording Delay %eader” menu

item or set checU to



&ispla' mode selection.

&ispla' mode3 and iggle 4ill3 panels

The modes and corresponding controlsk positions are shown in the !ollowing

table

0ode Controls position Seismic sample

R Wiggle

H Wiggle N #ositive Fill

?"ariable area@

Wiggle N \egative Fill

P "ariable density ?Aray

levels@

Color

Color N Wiggle



Displa 0ode panel controls Description

Wiggle Wiggle mode

Aray "ariable density mode

Color Color mode

&iggle 1ill panel controls Description

\one \o wiggle !ill

#ositive #ositive !ill

\egative \egative !ill

Colors3 panel

Gse this panel to select colorsO

Colors panel controls DescriptionWiggle Wiggle color

Fill Fill color

Selected Selected trace color



Color mode palette setup

#ress button to popup “#alette” dialog

The !ollowing buttons use to control the palette listO

!utton Description

Create new palette

Duplicate current palette

Yemove current palette

ChecU all palettes !or export

GnchecU all

Bxport selected palettes to !ile

&mport palettes !rom !ile

>e!ore export to !ile checU reuired palettes in the listO



When palette is selected in the listE it is applied to the seismic window

>e!ore editing select needed palette in the list

The palette consists o! color marUersX space between two marUers is !illed by linear interpolation o! color

riginally the palette is made o! three marUersO

2 0ar3er Description

R RII Qaximal negative amplitude value

H I Zero amplitude level

NRII Qaximal positive amplitude value

To select a marUer picU it by mouse in the “QarUersMevels” panel

To choose new color !or a marUerE use panel o! colors in the right part o! thedialog Selected color will be shown “Selected Color” !ield To assign the

color to the selected marUerE press “$ssign Color” button

To add a new marUerE press “$dd QarUer” button \ew marUer will be

added between selected and previous marUers



To remove selected marUerE press “Delete QarUer” button QarUer position can be changed by moving marUer position control by

mouse

To save current changesE press “Gpdate” buttonE and to cancel the changes press “Yeset”



Scaling and gain setup

Scale panel

Scale panel controls Description

Traces Set trace number per centimeter

Fit seismic section to window horijontally

Time Set time scale ?cmsec@

Fit seismic section to window vertically

Aainw Wiggle Aain control

$utomatically ad[ust current wiggle gainE using

maximal amplitude values o! selected trace ?see

“Trace Selection article”@

Aain8 Color Aain control

$utomatically ad[ust color mode gain

ChecU this i! you need same gain value !or both

modes

To ad[ust a value by mouseE move mouse cursor to the corresponding slider ?

@E then press le!t mouse buttonE and ?Ueeping it pressed@ move

the slider Current value o! the parameter will be shown in edit control thatis on the right o! the sliderE and seismic image will be repainted to re!lect the

changes

&irection panel

Direction panel control Description

\ormal From le!t to right

Yeversed From right to le!t



Change scale and gain ,' mouse heel

0ouse 'osition during &heel

rotating

+ction

&n the Traces input !iledE

&n the Time $xis

Change horijontal scale

&n the Time input !ieldE

&n the %eaders $xis

Change vertical scale

&n the Seismic Section window Zoom&nZoomout in both directions

&t the Aainw input !ield Change Wiggle mode gain

&n the Aain8 input !ield Change Color mode gain

&irection panel

Control Description

\ormal From le!t to rightYeversed From right to le!t

5oom ,uttons.

!utton Description

Fit all the image to seismic window sije

Zoom by window #ress this button then draw a rectangle on the seismic

window ?move mouse cursor to !irst corner o! the rectangleE press le!t mouse

buttonE and Ueeping it pressedE move mouse to set desired sije@ Selectedregion will be joomed to sije o! the seismic window

Yeturn to previous joom

Zoom in ?R times@

Zoom out ?R times@



Direction o! scale changing caused by E E buttons depends on the

!ollowing radiobuttons selectionO

!utton DescriptionScale changes in both directions

Scale changes in horijontal direction

Scale changes in vertical direction

&e%ault Seismic 6ie /arameters

Select menu “"iew” → “Set Seismic "iew De!aults” to set de!aults !orseismic section

Select “"iew”→ “Set "elocity "iew De!aults” to set de!aults !or velocity

section ?in SBA !ormat@



Seismic indo

To show this window select “Seismic” tab

When you move mouse pointer in the seismic windowE values correspondingcurrent position will be shown in status bar at the bottom o! the main

window and in “Qouse #osition %eader >ox” Trc Trace number in the !ile

Time Time ?ms@Smp Sample value ?processing is applied4@



-es la,eling setup

#ress buttonE to popup $xes dialog

The dialog has two tabs To select headers that should be shown on the top

o! seismicE clicU “Trace $xis ?%eaders@” tab

There are two lists on this tabO Selected %eaders list contains descriptionso! trace header items that will be shown above seismic sectionE and

$vailable %eaders list contains all the SBA trace header items

&tem order in Selected %eaders corresponds to its position on axis ?higher or lower@



Controls on Trace $xis tabO

Control Description

$dd selected header item !rom $vailable %eaders to Selected

%eaders list

Yemove selected header item !rom Selected %eaders list

Clear Selected %eaders list

Qove selected header item in Selected %eaders Gp

Qove selected header item in Selected %eaders Down

For each item in Selected %eaders you can speci!y start value and stepFor exampleO Select CD# ensemble number” itemE assign start valueRI

and stepRI to it &n this case traces with CD# numbers RIE RRIE HRIE etcwill be labeled



To setup time axis labeling step clicU “Time $xis” tab

Bnter the step value &! time lines are needed set marU in the “Timelines”checUbox

To accept the changes press “$pply” or “^” button “^” also closes thedialog “Close” button discards any changes and closes the dialog

Scrolling the seismic image

There are two ways to scroll the imageO

− using scroll bars

− dragging by mouse

Qove mouse cursor to start pointE then press Y&A%T mouse button andUeeping it pressedE move the image into desired direction



$race selection

To switch into selection mode press button &t is the same button that is

used to switch into “#an” mode &mage on buttonE depict mode that will beselected a!ter the button press

While selection mode is chosenE move mouse cursor to desired trace and

press le!t mouse button $s resultE this trace becomes “selected”

Trace header values o! the selected trace will be shown in “>in header”

panel ?see “Display headers” article@

This trace is also used !or automatic gain control

To move trace selection some number traces !orward or bacUward use the!ollowing controlsO

Fill edit control with move step value

#ress button to move !orwardE and to move bacUward



&ispla'7 edit headers and data

$!ter button is pressedE “&n!o%eaders” panel will be shown in the le!t part o! the seismic windowO

Contents o! the panel depend on which radiobutton is checUed

!utton Contents

Aeneral Aeneral !ile in!ormation

Trace header %eader o! the selected trace

>in header >inary header o! SBA !ile

Text header Text header o! SBA !ile

Trace data Trace data sample values

Spectrum #ower spectrum graph

To change the panel sijeE move mouse cursor to the right boundary $nd

when the mouse cursor is changed into E press le!t mouse buttonE andholding it pressed move panel boundary into desired direction



Trace header items %ro"sing

Select “Trace %eader” tab to show contents o! the selected trace headerO



>esides browsing o! Unown header items ?“&tems” tab@E it is also possible to

display trace header as dump o! integer values array !or nonstandard dataanalysis ?“Dump” tab@



SEG-Y file tet header editing567

Select “Text %eader” tab to show contents o! the text header

Select appropriate line o! the header by mouse then enter changes !romUeyboard

To save the changes press “Gpdate” buttonE or press “Yeset” button to undo

all the changesP

&t is also possible to load text header data !rom text ?$SC&&@ !ile To do this press “From !ile” button or select menu “File” → “Moad Text %eader !rom







File” To load the data !rom the previous !ileE press small button that is onthe right o! the “From !ile” button

To save the header into text ?$SC&&@ !ile select “File” → “Save Text %eader

to File” menu item &t is also possible to load text header data !rom text ?$SC&&@ !ile To do this

press “From !ile” button or select menu “File” → “Moad Text %eader !rom

File” To load the data !rom the previous !ileE press small button that is on

the right o! the “From !ile” button

To save the header into text ?$SC&&@ !ile select “File” → “Save Text %eader

to File” menu item



SEG-Y file %inar header editing587

Select “>in %eader” tab to show contents o! the text header

Select appropriate line o! the header by mouse then enter changes !romUeyboard “Sample &nterval”E “\umber samples per data trace !or reel” and

“Data Sample Code” items cannot be changed because they a!!ect to !ileintegrity &! you need nevertheless to edit these itemsE then checU “$llow to

edit all items” box

Qodi!ied lines are highlighted by blue color >ad values are marUed by red





#rogram will not update !ile till all the bad values are corrected

To save the changes press “Gpdate” buttonE or press “Yeset” button to undoall the changes





$race 8eaders indo

8eader Items ,rosing

To show this window select “Trace %eaders” and “"iew” tabs

ChecU items in Selection panel that you want to display "alues o! selected

header items will be shown in Data panel

#ressing to button selects all the itemsE and clears all selection

The program checUs !or trace headers consistence &! current trace header

value di!!erence with previous trace header is not eual di!!erence with next

traceE this value is highlighted by red color



Custom header items creation

The program allows create custom header item description Gse control

panel buttons !or this

The button creates a new header and shows editing dialog window

The button shows editing dialog window !or current header item

The button removes the current item

\oteO you can edit only custom header items

There are two types o! itemsO

• positionalO R or Hbit integerE !rom arbitrary header position

• computableO its value is calculated by mathematical expression



&n case o! positional item we have the !ollowing dialogO

FieldsO

\ame &tem nameO it should be uniueE it will be used !or header axis

labeling in seismic window and !or table column labeling in the trace

header window

Description %eader item description

#osition >yte position ?!rom R@ !or this item in trace header

Format Select needed !ormat !rom combo boxO &ntegerVREVHEVPE

&BBB FloatVPEVLE &>Q FloatVP

ou can copy position and !ormat !rom existing item to“#osition” . “Format” !ields To do thisE select item in “$vailable %eaders”

list and press button



To create a computable item select “Bxpression” tab

Bnter an expression that consists !rom numbersE parenthesijesE operators?NV@ and special variables

BxamplesO Bxpression Description

\ current trace number in the !ile

\VH same multiplied by H

H [ust value H

%?HREP@VH integerVP !rom position HR o! trace header ?CD#@ multiplied byH



9race Searching

Go to end or %eginning of the file

• go to the !irst trace

• go to the last trace

Go to the trace "ith gi$en inde

To activate this mode clicU le!t mouse button over “Trace ” table header

Fill in search number ?\@

Select search condition !rom the listO

• go to trace index o! which is eual o! the search number

• N go \ traces !orward

• go \ trace bacUward

Trace search % header item $alue

To activate this mode clicU le!t mouse button over needed header item name



?liUe “CD#”@

Fill in search number ?\@

Select search condition !rom the listO

• !ind trace where selected header item value is eual \• N !ind trace where selected header item value is eual current value N \

• !ind trace where selected header item value is eual current value \

• !ind trace where selected header item value is not eual \



#ress one o! the !ollowing buttonsO

• seuential search !orward

• seuential search bacUward

•

• !ast binary searchKE it worUs only on ordered seuence o! values

?ascended or descended@ ? is not supported@

&! !ile sije is bigE then search may taUe su!!icient amount o! time

#ress button to terminate current search





$race header editing

Single trace header item modi%ication

Qove mouse pointer to table cell with header item value that you are goingto change and press le!t mouse button

\ame and value o! selected item will be shown on screen

Fill in edit !ield by new item value

and press Gpdate button



$race headers changing ,' e-pression

%eaders o! selected traces ?SeeO “Selection o! traces to be displayed” article@

can be changed by means mathematical expressions To activate modi!ication window select “Trace %eaders” and “Change” tabs



ChecU header to be changed in the selection panelE then in data panel clicU

table header corresponding to it in the data panelO



Then !ill in “Bxpression” !ield with expression text

The !ollowing variables have a special meaningO

"ariable Description

\ rdinal trace number in SBA !ile

M Mast trace number in SBA !ile

Function that returns arbitrary trace header item value is also de!inedO

_?pE!@E where p f item position in the headerE ! f !ormat ?HintegerVHE PintegerVP@

For exampleO %?HREP@ returns CD# number

Toolbar buttonsO

&nserts value o! item currently selected in the selection panel

&nserts current trace number in the expression

&nsert last trace number

Clears expression !ield

Gpdate !ile with new values

Gndo the latest !ile modi!ication



Yepeat all above !or each item you want to change and then press button

The !ollowing dialog will be shownO

#ress “Gpdate” to change !ile or “Close” to cancel changes



8ardcop' indo

To show this window select “%ardcopy” tab

:;<=>? @ABD=E;F@G

To print seismic image select “#rint” tab

#ress “Setup” button to choose printer and page sije Standard “#rint setup”dialog will be shown Gse it to setup your parameters &n!ormation aboutselected printer will be shown in “#rinter &n!o” panel

To select orientation o! plot use “%orijontal” and “"ertical” radiobuttons



&t is possible only part o! seismic sectionE !or that you need to !ill in #rintYegion !ormO

Tmin Qinimal Time ?ms@

Tmax Qaximal Time ?ms@

From tr Start !rom this trace

'0 tr Stop at this trace

Gse “min” and “max” buttons to set minimal or maximal possible values

#ress “$ll” button to print ?export@ whole sectionE and “"iew” button to print Seismic "iew image

To place text label ?one string@ !rom “Mabel” edit control to printout set

marU into checUbox “File name” button puts current !ile name into

edit controlE and “Clear” button empties the control

&! image sije is bigger then page sije then it will be spitted into several

parts

#rint preview panel shows as image is divided into pages &! you changed

display modeE scalingE etcE then current changes also will be re!lected in the preview panel

To print the imageE press “#rint” button The button label changes to “$bort

#rint” #rinting progress will be shown in progress bar at the bottom o! thewindow

To cancel printingE press “$bort #rint” button

While printing other worU with the program is not allowed



HJKBD> @ABD=E;F@G J;LJ@@ NBD=>; indos itmap (.,mp)

Select “Bxport” tab in “%ardcopy” window

Fill “>itmap Dpi” !ield with dot per inch value !or your bitmap image

&n “Color Qode” select image typeO Hcolor ?color Lbit@ or blacU and

white ?bw R bit@

Then press “Bxport” button When standard “File Save” dialog appearsE use

it to speci!y output !ile “Close” button discards dialog



/rocessing

#rocessing is applied to trace be!ore it will be shown on screen %ere is the processing modules listO

− band pass !ilter

− automatic gain control ?$AC@

− data inversion ?negation@

/rocessing parameters setup

To set the processing parameters press button or select“#rocessing”→ “#arameters” menu itemE a!ter that “#rocessing” dialog

appears Bnter parameters needed To accept the parameters press “$pply”or “^” button “^” also closes the dialog “Close” button discards any

changes and closes the dialog



/rocessing panel

Gse the panel to toggle corresponding processing

'rocessing panel item Description

&nversion Data inversion ?\egation@

Filter >and pass !ilter

$gc or \orm $utomatic gain control or \ormalijation

Weight Gse Trace Weighting Factor trace header item

pen “#rocessing” dialog



and pass %ilter

Bnter !ilter cut !reuencies as it is shown in the picture and checU “Gse

!ilter”E i! you want to use the !ilter

riginal data Filtered data



utomatic gain control (!C)

&n “Gse \ormalijation” mode maximum amplitude value is calculated !or

trace and each sample is divided to its value &n “Gse $AC” mode “Window length” parameter sets $AC window length

$AC module moves the window down the trace samplebysample andcalculates a scale !actor at each location The scale !actor is eual to the

YQS amplitude in the window

Bnter “Window length” and checU “Gse $AC”E i! you want to use the $AC

riginal data $AC applied



In+ersion

This module replaces each sample in trace to inversed value ?multiply by

minus one@ChecU “Gse &nversion” to apply the inversion



/oer Spectrum indo

To show the Spectrum window press button or select menuO

“"iew” → “Spectrum”

?amplitude E !reuency %j@

Gse the !ollowing checU boxes to control spectrum charts curvesO Chec3 !o Description

Whole Section Whole section summary spectrum

Yange Spectrum o! selected region ?see Selection table@

Current Trace Spectrum o! current reace



To calculate rectangular region spectrum !ill “Selection” table !romUeyboard

When it is done press button

#ress button to !ill the table with current seismic section boundaries

$lso you can select the region by mouse in seismic window f button



ppendices

-pressions

Special +aria,les and header item +alue %unction

The !ollowing variables have a special meaningO

"ariable Description

\ rdinal trace number in SBA !ile

M Mast trace number in SBA !ile

Function that returns arbitrary trace header item value is also de!inedO

_?pE!@E where p f item position in the headerE ! f !ormat ?HintegerVHE PintegerVP@

For exampleO %?HREP@ returns CD# number

-pression S'nta-

Bxpressions have pretty much the same syntax as they would have on paperE

with the !ollowing exceptionsO

• Bach expression must end with a semicolon This is because the expression

string can actually contain multiple expressions The semicolon is used to

marU the end o! the expression &n our case semicolon at the end o! the

expression can be omitted

Eamples9o PVxNX

o yNHXgPNX

o yrVsin?a@XxrVcos?a@X

• The asterisU qVq must be used to multiply

Eamples9

o yVX :alid

o g?xNR@V?xR@X :alid

o g?xNR@?xR@X In$alid



Qore than one expression may be contained within an expression string $sshown aboveE each expression must end with a semicolonE even i! only one

expression is in the string The value o! an expression string is the value o!the last expression in the string

Eamlples9

• gKX :alue9 ;

• UjNRX :alue9 <=>

• rPXUXoNrUX :alue9 ?=r-3

Some !unctions may taUe re!erence parameters These parameters are

re!erences to other variables ou can mix re!erence parameters with normal parameters The order o! the normal parameters must remain the same and

the order o! the re!erence parameters must remain the same

Eamples9

• min?REHEEPEmval@X @m$al is a reference to a $aria%le m$al

• min?REHEmvalEEP@X You ma mi them inside li3e this

• min?REHE?mval@EEP@X You ma not nest reference parameters in an "a

Bxpressions may also be nested with parenthesisEamples9

• ysin?xcos?Nmax?PEEVx@@@X

• N?HV?xNy@@X

Bxpressions may also have whitespace characters and comments

Whitespace characters such as newlinesE line!eedsE carriage returnsE spacesEand tabs are ignored Comments begin with the less thansign qq and end

with the greater thansign qq Comments may be nested as well

Eample9

Se# #2e x 3alue

x + d * co!5r6

Se# #2e 3alue

+ d * !in5r6

%ommen# ou# #2i! for no(

Fli" #2e 3alue!

# + x

x +

+ x

S#o" commen#ing ou#



&! a variable is used in an expressionE but that variable does not existE it is

considered jero &! it does exist then its value is used instead

-pr+al Internal 4unctions (,' rian . 6ander,urg II) The !ollowing !unctions are provided with BxprBvalO

1unction

0in

+rg

s

0a

+rgs

0in

#ef

+rg

s

0a

#ef

+rgs

#esultComment

abs?v@ R R I I$bsolute value o! v

abs?P@ returns P

mod?vEd@ H H I I Yemainder o! vdmod?HEH@ return IH

ipart?v@ R R I IThe integer part o! v

ipart?H@ returns

!part?v@ R R I IThe !ractional part o! v

!part?H@ returns IH

min?vE@ R \on

eI I

The minimum number passed

min?EHEEHEK@ returns

max?vE@ R \on

eI I

The maximum number passed

max?EHEEHEK@ returns K

pow?aEb@ H H I IThe value a raised to the power b

pow?HERK@ returns HRK

srt?a@ R R I I The suare root o! a srt?R@ returns P

sin?a@ R R I IThe sine o! a radians

sin?R@ returns around IK

sinh?a@ R R I IThe hyperbolic sine o! a

sinh?R@ returns around HRH

asin?a@ R R I IThe arcsine o! a in radians

asin?I@ returns around IHP

cos?a@ R R I IThe cosine o! a radians

cos?R@ returns around IIKIK

cosh?a@ R R I IThe hyperbolic cosine o! a cosh?R@ returns

around HH

acos?a@ R R I IThe arccosine o! a in radians

acos?I@ returns around RIPK

tan?a@ R R I IThe tangent o! a radians

tan?R@ returns around RPRIR

tanh?a@ R R I I

The hyperbolic tangent o! a tanh?R@ returns

around II



atan?a@ R R I IThe arctangent o! a in radians

atan?I@ returns about IHR

atanH?yEx@ H H I IThe arctangent o! yxE with uadrant correction

atanH?PE@ returns about IHK

log?a@ R R I I The base RI logarithm o! alog?RII@ returns H

powRI?a@ R R I IRI raised to the power o! a

powRI?H@ returns RII

ln?a@ R R I IThe base e logarithm o! a

ln?HL@ returns around RII

exp?a@ R R I Ie raised to the power o! a

exp?H@ returns around KL

logn?aEb@ H H I IThe base b logarithm o! a

logn?REH@ returns P

ceil?a@ R R I IYounds a up to the nearest integer

ceil?H@ returns P

!loor?a@ R R I IYounds a down to the nearest integer

!loor?H@ returns

rand?@ I I I IYeturns a number between I up to but not

including R

random?aEb@ H H I IYeturns a number between a up to and including

b

srand?a@ R R I I

Seeds the random number generator with a

valueYeturn value is unUnown

randomije?@ I I I I

Seed the random number generator with a value

based on the current time

Yeturn value is unUnown

deg?a@ R R I IYeturns a radians converted to degrees

deg?RP@ returns around RKI

rad?a@ R R I IYeturns a degrees converted to radians

rad?RLI@ returns around RPH

recttopolr?xEy@ H H I IYeturns the polar radius o! the rectangular coordinates

recttopolr?HE@ returns around I

recttopola?xEy@ H H I I

Yeturns the polar angle ?IH#&@ in radians o!

the rectangular coordinates

recttopola?HE@ returns around ILL

poltorectx?rEa@ H H I I

Yeturns the x rectangular coordinate o! the

polar coordinates

poltorectx?ER@ returns around IHRH

poltorecty?rEa@ H H I I

Yeturns the y rectangular coordinate o! the

polar coordinates poltorecty?ER@ returns around HH



i!?cEtE!@ I I

Bvaluates and returns t i! c is not II Blse

evaluates and returns !

i!?IREHRE@ returns HR

select?cEnEjEp@ P I I

Yeturns n i! c is less than II Yeturns j i! c is

II &! c is greater than II and only threearguments were passedE returns j &! c is greater

than II and !our arguments were passedE return

p

select?EREPE@ returns

eual?aEb@ H H I IYeturns RI i! a is eual to b Blse returns II

eual?EH@ returns II

above?aEb@ H H I IYeturns RI i! a is above b Blse returns II

above?EH@ returns RI

below?aEb@ H H I IYeturns RI i! a is below b Blse returns II

below?EH@ returns II

avg?aE@ R \on

eI I

Yeturns the average o! the values passed

avg?EE@ returns P

clip?vEminEmax@ I I

Clips v to the range !rom min to max &! v is less

than minE it returns min &! v is greater than max

it returns max therwise it returns v

clip?EREH@ returns H

clamp?vEminEmax

@ I I

Clamps v to the range !rom min to maxE looping

i! needed

clamp?LHEREPK@ returns RP

pntchange?sideRo

ldE sideHoldE

sideRnewE

sideHnewE oldpnt@

I I

This is used to translate points !rom di!!erent

scale &t worUs no matter the orientation as long

as the sides are lined up correctly

pntchange?REREIEPLIEI@ returns RHI ?x

example@

pntchange?REREPLIEIEI@ returns I ?y

example@

poly?xEcRE@ H \on

eI I

This !unction calculates the polynomial x is the

value to use in the polynomial cR and on are the

coe!!icients

poly?PEEEEREP@ returns HRLsame as VPP N VP N VPH N RVPR N PVPI

and?aEb@ H H I I

Yeturns II i! either a or b are II Blse returns

RI

and?HREII@ returns II

or?aEb@ H H I I

Yeturns II i! both a and b are II Blse returns

RI

or?HREII@ returns RI

not?a@ R R I IYeturns RI i! a is II Blse returns II

not?I@ returns II

!or?initEtestEincEaRP \on I I This !unction acts liUe a !or loop in C First init



E@ e

is evaluated Then test is evaluated $s long as

the test is not IIE the action statements ?aR to

an@ are evaluatedE the inc statement is evaluatedE

and the test is evaluated again The result is the

result o! the !inal action statement

!or?xIEbelow?xERR@ExxNREyyNx@ returns I?i! y was initially II@

many?exprE@ R \on

eI I

This !unction treats many subexpressions as a

single ob[ect ?!unction@ &t is mainly !or the q!orq

!unction

!or?many?[EUR@Eabove?[VUEIIIR@Emany?[[N

EUUH@EI@

Date post:	07-Aug-2018
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