Routines by Type

input-output

dump_sg2 list SEG2 data

read input HotShot data

read_bis input Bison data

read_bmp input BMP files

read_csv input CSV data

read_eko input Ekko data

read_sg2 input SEG2 data

read_sgd input SEGD data

read_sgy input SEGY data

write output HotShot data

write_bmp output BMP files

write_csv output CSV data

write_sgy output SEGY data

stick-plots

hist histogram of individual traces

histogram histogram of entire data set

list_csv list traces in comma-separated-value format

list_1 list-plot one trace and list header

list_2 list-plot two traces and list headers

list_3 list-plot three traces and list headers

list_diff list-plot two traces & their difference

listspec list-plot trace's amplitude and phase spectrum

bitmaps

section seismic section generation

spectrum generate 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

r_scale record normalization

rabal record-averaged balance

rascal record normalization according to its maximum

scab shot and channel amplitude balance

sphered spherical divergence correction

srab shot and receiver amplitude balance

t_scale trace normalization

filtering and deconvolution

correlate correlate or convolve two traces

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

match_fil make a match filter

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

stft short term fourier transform filtering

headers

cdp_bin assign cdp numbers to traces

cdp_bin3 assign cdp numbers to traces

chart plot header values

f_break store time picks in headers

geometry geometry definition

h_math header maths

h2spike place spike on trace at time from header

head_drop drop selected header elements

head_keep keep selected header elements

head2t copy header element to trace

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

measure measure various trace levels and store in headers

p190 define trace headers from a P1-90 file

poly_crop check that trace co-ordinates are within a polygon

r_fold count the number of traces in each record

r_measure measure various record levels and store in headers

reindex reset trace header indices; set record_n and e-o-r headers

rotate rotate header co-ordinates

sign_off generate signed offsets from unsigned offsets

sps define trace headers from SPS files

sr_bin assign sequential shot, receiver numbers to traces

t2head copy trace element to header

xy_bin assign cdp bin numbers to traces

statics, dynamics, mutes, stack

focus compute and apply residual static corrections

h_mute trace mute according to header values

mute trace mute

nmo apply or remove normal-moveout

refocus apply residual static corrections

respex automatic statics and dynamics

revelator instantaneous stack

shift trace static application

snmo statics and normal-moveout

stack stack and mute-zone scale

stack_it democratic stack

stack_med automatic spike and noisy trace edit

stack_t2 trim all highest amplitudes; stack

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

pstm pre-stack time migration

redatum datum migration

utility

append_2 join two traces

append_n join all the traces from a record into a single trace

complex complex trace generation

depthcon time-to-depth conversion

diffract generate a pre-stack diffraction

filler fill dead zones in records

flatten horizontal alignment

gates trace windowing

hann_2d generate a 2d Hanning function

hyper generate hyperbolas

limit zero trace samples inside or outside a given range

make generate synthetic traces

mid_range copy central samples from input to output

mix running mix

patch interpolate/extrapolate for missing traces

peak_freq show how trace frequency varies with time

pickup reorder trace elements; splice traces

pilot generate pilot traces

r_acor record autocorrelations and amplitude spectrums

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 pad or truncate traces

repeat trace repeater

resample change trace sampling rate

resampx trace interpolator

retrace interpolate/extrapolate; coherency enhancement

rezero re-mute after filtering

rgb_grey make greyscale traces by adding red, green, blue traces

semb semblance of sets of traces

sinc_2d generate a 2d sinc function

sort trace reorder using memory

splice merge two sets of traces

split_2 split one trace into two

stretcher trace stretcher

sweep generate a Vibroseis sweep trace

t_math trace maths

taper taper trace segments up or down

tramps find amplitude spectrums of two traces and their ratio

tweak signal enhancement

z_vector vectors of depths from velocity functions

single-channel (vector) maths

add_2 vector add

alog_10 vector inverse log (base 10)

atan vector inverse tangent

atan_2 vector inverse tangent from paired elements

c_mul_2 complex vector multiply

c_recip complex vector reciprocal

cfft complex-to-complex fft

clip clip|zero vector elements outside given range

copy vector copy

cosine vector cosine

div_2 vector divide

dotpr vector dot product

envel vector envelope

exp vector exponentiate

fill vector fill with scalar

fraction truncate vector elements to fractional parts

hann Hanning taper

hlbrt Hilbert transform

integer truncate vector elements to wholenumber parts

kill vector clear

l_eq logical vector from vectors equal

l_ge logical vector from vectors greater or equal

l_gt logical vector from vectors greater than

l_ne logical vector from vectors not equal

l_not logical vector not

log_e vector natural log

log_10 vector log (base 10)

max vector maximum value

max_2 form vector from maximum of paired elements

mean vector mean value

mean_mg vector mean magnitude

mean_sq vector mean from vector elements' squares

min vector minimum value

min_2 form vector from minimum of paired elements

mul_2 vector multiply

negate vector negate

noise generate random number vector

polar rectangular-to-polar conversion

positive vector absolute values

reorder vector element sort

rect polar-to-rectangular conversion

reverse vector reverse order

rfft real-to-complex fft

rms root-mean-square of vector elements

s_square vector signed square

s_sqrt vector signed square-root

scale vector normalize

sign_bit replace vector elements by ±1

sim_int Simpson's rule integration

sine vector sine

sqrt vector square-root

sub_2 vector subtract

sum sum of vector elements

sum_int vector running-sum integration

xcor cross-correlation

multi-channel (matrix) maths

rfft_2d 2d real-to-complex fft

radial radial trace transform

rgb_90 rotate bitmaps through ±90 degrees

vt_xt transform vt records to xt

xcor_2d 2d correlation

xpose matrix transposition

xt_vt transform xt records to vt

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