NAME
windstat - calculates amplitude statistics within a verti-
cal window.
SYNOPSIS
windstat [ -Nfile_in ] [ -Ofile_out ] [ -rsstart_record ] [
-reend_record ] [ -nsstart_trace ] [ -neend_trace ] [
-sstart_time ] [ -eend_time ] [ -uhupper_horizon_header_word
] [ -lhlower_horizon_header_word ] [ -uwupper_horizon_offset
] [ -lwlower_horizon_offset ] [ -decode ] [ -all ] [
-AVAfilename ] [ -AAAfilename ] [ -LPVfilename ] [
-LNVfilename ] [ -APVfilename ] [ -ANVfilename ] [
-A36filename ] [ -A18filename ] [ -PMfilename ] [ -AAD-
filename ] [ -SADfilename ] [ -ESSfilename ] [ -TLPfilename
] [ -TLNfilename ] [ -P12filename ] [ -P13filename ] [
-SAVfilename ] [ -DAVfilename ] [ -LADfilename ] [
-LTDfilename ] [ -SDfilename ] [ -SDPfilename ] [
-SDNfilename ] [ -SDAfilename ] [ -MEDfilename ] [
-MDPfilename ] [ -MDNfilename ] [ -MDAfilename ] [
-MAAfilename ] [ -MTAfilename ] [ -ssam ] [ -V ] [ -? ]
DESCRIPTION
windstat computes selected reductions for each trace in the
dataset.
windstat gets all its parameters from command line argu-
ments. These arguments specify the input, output, start/end
record/trace/sample and what reduction(s) to compute.
-N file_in
Enter the input data set name or file immediately after
typing -N. This input file should include the complete
path name if the file resides in a different directory.
Example -N/export/data2/san_juan/taup_file tells the
program to look for file 'taup_file' in directory
'/export/data2/san_juan'.
-O file_out
Enter the output multi-reduction data set name or file
immediately after typing -O. Reductions will be output
as subsequent samples within the same trace, with the
average first (if -AVA is entered), the average of
absolute values second (if -AAA is entered), etc. This
output file name is not required when piping the output
to another process.
-rs rs
Enter the desired starting record number. If no entry,
program assumes first record in data set.
-re re
Enter the desired final record number. If no entry,
program assumes last record in data set.
-ns ns
Enter the desired starting trace number. If no entry,
program assumes first trace in each record.
-ne ne
Enter the desired final trace number. If no entry,
program assumes last trace in each record.
-s s Enter the start time for analysis. The default is the
beginning of the trace. This parameter will be disre-
garded if -uh is supplied.
-e e Enter the end time for analysis. The default is the end
of the trace. This parameter will be disregarded if -lh
is supplied.
-uh uh
Trace header word mnemonic in which the start time for
analysis is found.
-uw uw
Offset in units of the data from the upper horizon [-uh
above]. The default is 0.0.
-lh lh
Trace header word mnemonic in which the end time for
analysis is found.
-lw uw
Offset in units of the data from the lower horizon [-lh
above]. The default is 0.0.
-all Calculate all statistics. For each trace, store all
statistics (one per sample) in the output trace. See
the -decode option for information on how to tell what
sample goes with what statistic.
-decode
Once you have generated a multi-statistic file, you can
use this option to tell which sample goes with which
statistic. Use the previously generated windstat out-
put multiple statistic file as input, as in "windstat
-Nprev.out -decode". A list of statistics and sample
numbers will be printed.
-XXX filename
Enter the option followed by the file name to output
this statistic to a separate file. Note that statis-
tics will be output to a file with one sample per
trace. If the option is entered with no file name,
this statistic will be directed to the file or pipe
defined by the -O option above.
The following describes the available statistics:
average (-AVA)
average of absolute values (-AAA)
largest positive (> 0) value (-LPV)
largest negative (< 0) value (-LNV)
average of positive (> 0) values (-APV)
average of negative (< 0) values (-ANV)
angle of phase vector sum; +360 if negative (-A36)
angle of phase vector sum; +180 (-A18)
phase magnitude (-PM)
average of absolute sample to sample difference (-AAD)
sum of absolute sample to sample difference (-SAD)
energy, sum of sample*sample (-ESS)
time of largest positive (> 0) value (-TLP)
time of largest negative (< 0) value (-TLN)
-TLP with parabola fit (-P12)
-TLN with parabola fit (-P13)
sum of absolute values (-SAV)
decay of absolute values (-DAV)
largest peak/trough amplitude difference (-LAD)
largest peak/trough time difference (-LTD)
standard deviation (-SD)
standard deviation of positive (> 0) values (-SDP)
standard deviation of negative (< 0) values (-SDN)
standard deviation of absolute values (-SDA)
median (-MED)
median of positive (> 0) values (-MDP)
median of negative (< 0) values (-MDN)
median of absolute values (-MDA)
maximum of absolute values (-MAA)
time of maximum of absolute values (-MTA)
-ssam
Enter the command line argument '-ssam' to get execu-
tion status echoed to stderr during the run.
-V Enter the command line argument '-V' to get additional
printout.
-? Enter the command line argument '-?' to get online
help. The program terminates after the help screen is
printed.
See Also:
semb3d, asig, asig1d, asig3d, XIKP, lm3dvtosis, sistolm3dv
AUTHOR
Kelly D. Crawford (E&PTG, Tulsa, OK, USA) Built mostly on an
earlier work (program asig3d - Kurt Marfurt) and input from
Steve Farmer and Greg Partyka.
COPYRIGHT
copyright 2001, Amoco Production Company
All Rights Reserved
an affiliate of BP America Inc.
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