FK - Revision history

Mao at 14:09, 12 March 2010

2010-03-12T14:09:04Z

2010-03-12T14:07:28Z

2010-03-12T14:03:48Z

2010-03-12T08:19:03Z

Parameters for time window settings

2010-03-11T16:56:50Z

Testing parameter settings and starting f-k processing

2010-03-11T16:56:03Z

F-K Toolbox (conventional f-k) - overview

2010-03-11T16:51:57Z

F-K Toolbox (conventional f-k) - overview

2010-03-11T16:47:35Z

F-K Toolbox (conventional f-k) - overview

2010-03-11T14:23:02Z

Testing parameter settings and starting f-k processing

2010-03-11T13:25:57Z

Parameters influencing the sampling of the wavenumber space

@@ Line 527: / Line 527: @@
 '''Note:''' Due to the variability in the estimation process, various disturbances in the wavefield
-and violations of the [[General: Basic Array|basic array processing assumptions]] (e.g. plane wave arrivals)
+and violations of the [[Array_signal_processing#Basic_principle_of_array_processing_-_delay_and_sum_.28or_shift_and_sum.29|basic array processing assumptions]] (e.g. plane wave arrivals)
 and the well-known limitations of the array geometry in terms of aliasing and resolving capabilities,
 the automatically determined dispersion curves look often very messy. In order not to get disturbed by this curve plotted over the histogram display, you can hide the curve by toggling the '''visible''' button an the

@@ Line 231: / Line 231: @@
 unnecessary computation time for lower frequency bands. On the other hand, restricting the ''grid_size''
 too strongly on the apparent side lobes in the array reponse function will not allow for high frequencies to
-obtain any result for slowly propagating waves. For an in-depth discussion of this issue [[K_max|look here]].
+obtain any result for slowly propagating waves. For an in-depth discussion of this issue [[Warangps#kmax|look here]].
 [[Image:FKGridding.png|thumb|left|300px|Gridding parameters for the wavenumber plane]]

@@ Line 551: / Line 551: @@
 the histogram picture.
 Details about the editing capabilities and final dispersion curve determination may be found in
-[[Dispersion Curve Interpretation|this page]].
+[[Dispersion curve interpretation|this page]].
 <br style="clear: both"/>

@@ Line 81: / Line 81: @@
 Note: a selection of time limits as ''From: during'' && ''To: during'' is NOT valid.
 [[Image:FKGeneralTab.png|thumb|left|300px|General tab]]
@@ Line 91: / Line 92: @@
 * Freq. dep. (read: frequency dependent. Scales window length to the center frequency of each frequency band to be processed. The number given in the editable box corresponds to a window length in number of cycles for each frequency band. ''T'' is the center period of the band).
-Note: the most common setting for the ''Length'' parameter is ''Freq. dep.'' with values between 20.00 to 50.00 meaning that 20 to 50 cycles
+'''Note:''' the most reasonable and only implemented setting for the ''Length'' parameter in the context of narrowband dispersion curve processing
 of the central signal period per frequency bands are used as window length. Example: for a frequency band with center frequency 2.5 Hz, the central period is 1/2.5 = 0.4 s. Therefore, with a frequency dependent ''Length'' setting of ''30.00 T'', the window length will be chosen as 12.00 s.
 <br style="clear: both"/>
 === Parameters for frequency band selection ===

@@ Line 315: / Line 315: @@
 plugins are multi-threaded applications and will use all available cpu-cores of your hardware. The progress for
 each computation thread will be displayed separately.
 == Contents of output file ==

@@ Line 42: / Line 42: @@
 The pre-processing parameters for excluding data from processing follow the same argumentation as the
-data selection for other toolboxes like [[Geopsy: HV Toolbox|H/V processing]] and can be found in the
+data selection for other toolboxes like [[Geopsy:_H/V_Spectrum_Toolbox|H/V processing]] and can be found in the
 ''Time tab''.
@@ Line 49: / Line 49: @@
 processing). The anti-trigger approach can be applied to raw or filtered data. For the detailed
 settings please look into the description of [[Geopsy:_STA/LTA#Anti-triggering_algorithm|anti-trigger]].
-Another, second, approach for excluding data from processing is provided via the [[Geopsy: Bad sample|bad sample]] approach.
+Another, second, approach for excluding data from processing is provided via the [[Geopsy:_H/V_and_Spectum_Toolboxes:_Time_Tab#Bad_Sample_Definition_and_Use|bad sample]] approach.
-For details in setting parameters with the bad sample approach check [[Geopsy: Bad sample|this page]].
+For details in setting parameters with the bad sample approach check [[Geopsy:_H/V_and_Spectum_Toolboxes:_Time_Tab#Bad_Sample_Definition_and_Use|this page]].
 <br style="clear: both"/>

@@ Line 3: / Line 3: @@
 [[Image:LepRing01OnlyVertical.png|thumb|right|400px|Signal viewer for one group of simultaneously recorded waveforms ready for array processing]]
-If you have followed all steps for the preparation of a [[Geopsy: Database|database]], [[Geopsy: Set Receivers|loading coordinates]]
+If you have followed all steps for the preparation of a [[Geopsy: Database|database]], [[Geopsy: Set receivers|loading coordinates]]
 and [[Geopsy: Groups|grouping]], you should have now a set of simultaneously recorded waveforms
 building a group and containing coordinates for each waveform.

@@ Line 304: / Line 304: @@
 domain always to be located at the same distance from the center of the wavenumber map.
 Using the black circles helps to locate the relative distance of dominant peak(s) in the wavenumber domain
-with respect to the center of the figure. For a single frequeny, we expect only the direction to change, but
+with respect to the center of the figure. For a single frequency, we expect only the direction to change, but
 finding the peak maximum always below the circle line.
 <br style="clear: both"/>
 == Contents of output file ==

@@ Line 219: / Line 219: @@
 In the current version of the f-k toolbox, the grid_step for sampling is automatically calculated as
-<math>grid\_step = k_{min}/4</math>. Thus, any potential peak to be indentified in the wavenumber
+<math>grid\_step = k_{min}/4</math>. Thus, any potential peak to be identified in the wavenumber
 domain will be sampled in either direction at least with four samples.