downsummer

NAME

SYNOPSIS

DESCRIPTION

downsummer is a c-shell script which utilizes several USP routines to construct a downsum panel of the input dataset. It is recommended that a single record at a time be processed. The output consists of the input record followed by a set of bandpass records corresponding to the number of input filters used, followed by a set of summation records. The upper frequency of each bandpass and downsum record is contained in the RecNum trace header entry for plotting with TPLTR. The first bandpass has the following filter points:

 f1 =  -fmin 
 f2 =  -fmin  + -finc
 f3 =  -fmin  + -finc 
 f4 =  -fmin  + -finc

The number of output bandpass filters is a function of the -fmin, -fmax, and -finc and the above bandpass will have each entry incremented by finc hertz until the f4 entry becomes greater than -fmax. The separation of the trapezoidal filter corners F1, F2, F3, F4 is given by -df

downsummer gets both its data and its parameters from command line arguments. These arguments specify the input, start and end records, initial f1 frequency and maximum f4 frequency.  

Command line arguments

-N ntap [no default]

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/b/vsp/dummy tells the program to look for file 'dummy' in directory '/b/vsp'.

-rs nrst

Enter start record number. Default value is the first record.

-re nred

Enter end record number. Default value is last record.

-fmin freq1

Enter the initial (lowest) F1 frequency. Default value is zero.

-fmax maxfreq

Enter the limiting F4 frequency for the panel. Default value is 95 hertz.

-finc incfreq

Enter the increment of the trapezoidal filter. Default value is 10 hertz.

-df dffreq

Enter the increment of the trapezoidal filter corners. Default value is 5 hertz.

Enter the command line argument 'downsummer' to get online help. The program terminates after the help screen is printed.

BUGS

SEE ALSO

AUTHOR

COPYRIGHT

Index

NAME

SYNOPSIS

DESCRIPTION

Command line arguments

BUGS

SEE ALSO

AUTHOR

COPYRIGHT