Commit 08e80cd0 authored by thomas.forbriger's avatar thomas.forbriger
Browse files

[TASK][DOC] (lisousi): advance version number and fix description

Fix some sentences and expressions in the online description. These were not
wrong previously but could be expressed in a more appropriate or consistent
way.
parent 32a3ac20
......@@ -65,7 +65,7 @@ Single-velocity transformation
F = sqrt(2*r*v),
where r is taken as the source to receiver offset (as provided in the data
files) and v is the propagation velocity taken from argument to option
files) and v is the propagation velocity taken from the argument to option
-velocity or its default value.
Direct-wave transformation
......@@ -90,9 +90,9 @@ Reflected-wave transformation
F = v*sqrt(2*t),
where v is the average propagation velocity taken from argument to option
-velocity or its default value and t is the travel time of the wave (which
equals the sample time in the data files).
where v is the average propagation velocity taken from the argument to
option -velocity or its default value and t is the travel time of the wave
(which equals the sample time in the data files).
Hybrid transformation
---------------------
......@@ -107,11 +107,11 @@ The program offers options to select different ways of constructing the
1/sqrt(t) filter and the way this filter is applied. Application of the filter
(convolution with 1/sqrt(t)) and the application of the scaling (tapering with
1/sqrt(t)) are not commutative in a mathematical sense and the results may
differ for a different order of the application, although no residuals where
observed in practical application yet. Some of the options are not really of
practical relevance due to more efficient and equally accurate alternatives.
For instance a time domain convolution is not recommended. These options are
primarily provided for experimental purposes.
differ for a different order of the application. However, residuals have not
yet been observed at a significant level in practical application. Some of the
options are not really of practical relevance due to more efficient and
equally accurate alternatives. For instance a time domain convolution is not
recommended. These options are primarily provided for experimental purposes.
Application of program control parameters
=========================================
......@@ -185,10 +185,10 @@ can be controlled by command line options.
-tshift f
-tlim f
-tfac f
They have a lesser (or even unnoticeable) impact when compared
to their impact when constructing the filter resonse. This is
because the time series to be tapered usually are small or
vanish close to t=0.
They have a lesser (or even unnoticeable) impact when compared to their
impact when constructing the filter resonse. This is because the portion
of the time series (close to t=0) which would be affected by the
close-to-singular taper usually is of small or vanishing amplitude.
Sampling time is taken as travel time in order to determine the
appropriate scaling (taper) factor. Since a finite bandwidth wavelet
......
......@@ -36,11 +36,11 @@ taper alternatives:
option selects to taper the time series after filtering
If this option is selected, the order of the processing
steps (which are not commutative) is reversed.
-sqrttaper By default we use sqrt(2)*r/sqrt(t) as the taper and scaling
-sqrttaper By default we use r*sqrt(2/t) as the taper and scaling
function (direct-wave transformation). This is appropriate for
direct waves. In the case of reflected waves commonly the
propagation velocity is assumed to be known (see option
-velocity). Then the scaling function is c*sqrt(2*t), where c is
-velocity). Then the scaling function is v*sqrt(2*t), where v is
the assumed phase velocity (reflected-wave transformation).
The latter is selected by this option.
-tapdel t delay taper function by t seconds; this accounts for
......
......@@ -60,11 +60,12 @@
* - 12/05/2015 V1.12a provide updated documentation
* - 21/09/2015 V1.12b indicate fix by advancing version id
* - 26/10/2015 V1.12c provide format specific usage text
* - 25/02/2016 V1.12d fix online usage description
*
* ============================================================================
*/
#define LISOUSI_VERSION \
"LISOUSI V1.12c line source simulation"
"LISOUSI V1.12d line source simulation"
#include "lisousi.h"
#include "wnintegration.h"
......
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