Standard Routines

input-output

dump_sg2        file  list   (Seg2    format)
read            trace input  (HotShot format)
read_bis        trace input  (Bison   format)
read_eko        trace input  (Ekko    format)
read_sg2        trace input  (Seg2    format)
read_sgd        trace input  (Segd    format)
read_sgy        trace input  (Segy    format)
write           trace output (HotShot format)
write_sgy       trace output (Segy    format)

list-plots

hist            histogram generator
list_csv        list traces in comma-separated-value format
list1           list-plot one trace and list header
list2           list-plot two traces and list headers
list3           list-plot three traces and list headers
listdiff        list-plot two traces & their difference
listspec        list-plot trace's amplitude and phase spectrum

bitmaps

chart           header values plots
section         seismic section generation
spectrum        amplitude and phase spectrums

scaling

agc             automatic gain control
agc_2           automatic gain control without shadow zones
balance         trace balance
gain            programmed gain control
gain_exp        exponential gain
gain_tq         time dependent gain
iscale          instantaneous scaling
rabal           record-averaged balance
rascal          record-averaged scaling
scab            shot and channel amplitude balance
sphered         spherical divergence correction

filtering and deconvolution

debias          dc bias removal
        debubble        remove bubble train from Maxipulse data
decon           single-channel deconvolution
filter          band-pass, band-reject, notch filter
finver          generate general inverse operator
fkfilt          fk filter
fkspec          fk amplitude spectrum generation
matchf          match filter computation
mean_f          multi-channel mean value filter
median_f        multi-channel median value filter
mnphase         compute minimum phase of given signal
radcon          record-averaged (and surface consistent) decon
reamp           replace vector's amplitude spectrum
rephase         replace vector's phase spectrum
        smoother        convolve trace with triangular or bell-shape operator
specs           generate traces containing amplitude spectrums

headers

cdp_bin         assign cdp numbers to traces
        f_break         store time picks in headers
geometry        geometry definition
h_math          header maths
h2spike         place spike on trace at time from header
head2t          copy header element to trace
headchop        delete header elements
        headcopy        copy headers across traces
headfix         round or truncate header values to whole number
headit          header 'if-then' value definitions
headlist        tabulate header values and maximum trace value
headlite        summary of header values
headtime        encode time-values in trace headers
headval         header value definition
        p190            copy items from a P1-90 file to trace headers
reindex         reset trace header indices; set end-of-record flag
t2head          copy trace element to header
write_csv       header output (Comma Separated Value spreadsheet format)

statics, dynamics, mutes, stack

focus           compute and apply residual static corrections
mute            trace mute
refocus         apply residual static corrections
reveller        instantaneous stack
shift           trace static application
snmo            statics and normal-moveout
stack           stack and mute-zone scale
stack_t2        mute, trim-stack and mute-zone scale
stackm          mute, stack and mute-zone scale
tptotx          reverse slant-stack (tau-p to tx)
txtotp          forward slant-stack (tx to tau-p)
v_stack         vertical stack
v_stackb        vertical stack

velocity analysis

cv_pick         constant velocity coherency picker & spectrum maker
cv_scan         constant velocity stack and coherency measure
cv_scanr        constant velocity record scan
v_vector        vectors of velocities from velocity functions
vf_pick         velocity function coherency picker
vf_scan         velocity function stack and coherency measure

migration

dmo             dip moveout
migrate         pre-stack time migration
redatum         datum migration

utility

append          join two traces
complex         complex trace generation
depthcon        time-to-depth conversion
diffract        generate a pre-stack diffraction
flatten         horizontal alignment
fold_bar        append fold-bars to stacked traces
gates           trace windowing
hyper           generate hyperbolas
make            generate synthetic traces
measure         measure various trace levels and store in headers
mix             running mix
patch           interpolate/extrapolate for missing traces
pickup          reorder trace elements; splice traces
pilot           generate pilot traces
ratio           measure ratio between data in two gates
refile          redefine a file's sort-order and sample-rate
reflect         generate a pre-stack reflection
relength        change trace length
repeat          trace repeater
resample        change trace sampling rate
resampx         trace interpolator
rezero          re-mute after filtering
semb            semblance of sets of traces
sort            trace reorder using memory
sort_d          trace reorder using disk
splice          merge two sets of traces
sweep           generate a sweep trace
t_math          trace maths
t_slice         select a time gate to process
        tweak           signal enhancement
z_vector        vectors of depths from velocity functions

general vector mathematics

cfft            complex-to-complex fft
clip            clip|zero vector elements outside given range
cvmul           complex vector multiply
cvrcip          complex vector reciprocal
dotpr           vector dot product
envel           vector envelope
hann            Hanning taper
hlbrt           Hilbert transform
lveq            logical vector from vectors equal
lvge            logical vector from vectors greater or equal
lvgt            logical vector from vectors greater than
lvne            logical vector from vectors not equal
lvnot           logical vector not
maxv            vector maximum value
meamgv          vector mean magnitude
meanv           vector mean value
measqv          vector mean from vector elements' squares
minv            vector minimum value
polar           rectangular-to-polar conversion
rect            polar-to-rectangular conversion
rfft            real-to-complex fft
rmsqv           root-mean-square of vector elements
sign_bit        replace vector elements by ±1
sve             sum of vector elements
vabs            vector absolute values
vadd            vector add
valog           vector inverse log (base 10)
vatan           vector inverse tangent
vatn2           vector inverse tangent from paired elements
vclr            vector clear
vcos            vector cosine
vdiv            vector divide
vexp            vector exponentiate
vfill           vector fill with scalar
vfrac           truncate vector elements to fractional parts
vint            truncate vector elements to wholenumber parts
vln             vector natural log
vlog            vector log (base 10)
vmax            form vector from maximum of paired elements
vmin            form vector from minimum of paired elements
vmov            vector copy
vmul            vector multiply
vneg            vector negate
vrand           generate random number vector
vrvrs           vector reverse order
vscale          vector normalize
vsimps          Simpson's rule integration
vsin            vector sine
vsort           vector element sort
vsqrt           vector square-root
vssq            vector signed square
vssqrt          vector signed square-root
vsub            vector subtract
vsum            vector running-sum integration
xcor            cross-correlation (2 sided; frequency domain)

general matrix mathematics

rfft_2d         2d real-to-complex fft
xcor_2d         2d correlation
xpose           matrix transposition

A Programmers' Toolkit is available.

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