Geopsy: H/V and Spectrum Toolboxes: Output Tab - Revision history

Gaillot at 12:32, 10 January 2013

2013-01-10T12:32:43Z

Gaillot: /* References */

2013-01-10T12:24:30Z

References

Gaillot at 12:24, 10 January 2013

2013-01-10T12:24:08Z

Gaillot: /* Frequency sampling section */

2013-01-09T14:40:29Z

Frequency sampling section

Gaillot: /* Output section */

2013-01-09T14:00:37Z

Output section

Gaillot: /* Output section */

2013-01-09T13:52:24Z

Output section

Gaillot: /* Output section */

2013-01-09T13:36:33Z

Output section

Gaillot: /* Appearance section */

2013-01-08T16:13:18Z

Appearance section

Gaillot: /* Appearance section */

2013-01-08T16:03:54Z

Appearance section

Gaillot: /* Appearance section */

2013-01-08T16:02:43Z

Appearance section

@@ Line 1: / Line 1: @@
 [[Image:HV_SPEC_toolb_output.png|thumb|right|300px|''Output'' tab where the user can fix the parameters to display and save the results]]
@@ Line 11: / Line 12: @@
 * ''Output'' section: where the user can fix where to save data.
+<br style="clear: both"/>
 == Frequency sampling section ==
 [[Image:HV_SPEC_toolb_output_frequency.png|thumb|left|300px|''Frequency sampling'' section used to define the parameters for frequency computing and displaying ]]
@@ Line 32: / Line 30: @@
 Log: the samples are logarithmically distributed.
 * Number of samples: number of samples used to process the [[Geopsy:_Fast_Fourier_Transform|Fourier transform]].
 == Appearance section ==
@@ Line 42: / Line 42: @@
 When processing several files at the same time, single graphics output are displayed on the same page. The number of individual graphics to be displayed per line may be determined with the ''Plots per line'' spin box, and the page heigth adjusted with the ''Page heigth'' spin box.
 == Output section ==

← Older revision		Revision as of 12:24, 10 January 2013
Line 72:		Line 72:

	<br style="clear: both"/>		<br style="clear: both"/>
−
−
−
−	~~== References ==~~
−	~~<references/>~~

@@ Line 73: / Line 73: @@
 <br style="clear: both"/>
 == References ==
 <references/>

@@ Line 10: / Line 10: @@
 * ''Output'' section: where the user can fix where to save data.
 == Frequency sampling section ==
-* The '''lower limit''' should be fixed in two different ways :
+[[Image:HV_SPEC_toolb_output_frequency.png|thumb|left|300px|''Frequency sampling'' section used to define the parameters for frequency computing and displaying ]]
-** The first possibility is to fix the lower frequency limit equal to the natural frequency of the sensor.
-** From SESAME guidelines <ref>Guidelines for the implementation of the H/V spectral ratio technique on ambient vibrations measurements, processing and interpretation, [http://SESAME-FP5.obs.ujf-grenoble.fr], 62 pages, April 2005</ref>, the other possibility is to define the lower frequency limit from the window length, taking into account the following formula <math>\frac{10}{w_l}>f_{seismometer}</math>. Where <math>{w_l}</math> is the window length and <math>f_{seismometer}</math> the natural frequency of the sensor.<br/>Example 1, if the windows have been fixed to exactly 25 seconds, the lower frequency limit is 0.4 Hz.<br/>Example 2, if the natural frequency of the sensor is 0.2 Hz, the lower frequency limit is 0.2 Hz (giving a maximum window length of 50 seconds).<br/>Example 3, if the natural frequency of the sensor is 0.2 Hz and the [[Geopsy:_Window_Length|window length]] has been fixed to 25 seconds, the higher frequency should be used. In this case: 0.4 seconds<br/><br/> Of course, it is always possible to pass over this limitation by computing and viewing at lower frequency, but in this case, the user shoud keep in mind that the data below the "theorical" limit are useless. Moreover, in the graphics of [[H/V_spectral_ratio|H/V]] or [[Spectral_amplitudes|Spectrum]] a red dashed area will appear in the frequencies below the <math>\frac{10}{w_l}</math> frequency as a reminder.
+<br style="clear: both"/>
-* The maximum '''upper limit''' is fixed by the [[Wikipedia:Nyquist_frequency|Nyquist frequency]], which corresponds to the half of the digitization frequency sampling. If the signal has a 100 Hz sampling frequency, the [[Wikipedia:Nyquist_frequency|Nyquist frequency]] will be 50 Hz.<br/>Above [[Wikipedia:Nyquist_frequency|Nyquist frequency]], due to the [[Geopsy:_Fast_Fourier_Transform|Fourier transform]] in itself, no data are available. So there is no need to go above the [[Wikipedia:Nyquist_frequency|Nyquist frequency]].<br/>Below [[Wikipedia:Nyquist_frequency|Nyquist frequency]], there is no lower limit to the '''upper limit''', except the '''lower limit''' frequency.<br/>In general, the '''upper limit''' is fixed in-between a 10-50 Hz frequency range.
+Log: the samples are logarithmically distributed.
-*Two options have to be fixed
+* Number of samples: number of samples used to process the [[Geopsy:_Fast_Fourier_Transform|Fourier transform]].
 == Appearance section ==

@@ Line 44: / Line 44: @@
 [[Image:HV_SPEC_toolb_output_output_browser.png||thumb|right|300px|Browser to choose the folder to save the results. It is possible to create a new folder.]]
-Results can be saved automatically while processing or after viewing the results. One file per station is created in the specified directory. First check the ''Output'' box. Then open the file browser by clicking on the ''browse'' button [[Image:SPEC_cursor.png]] and select the folder where to save the result files.
+Results and processing parameters can be saved automatically while processing or after viewing the results. First check the ''Output'' box. Then open the file browser by clicking on the ''browse'' button [[Image:SPEC_cursor.png]] and select the folder where to save the output files.
-The [[H/V_spectral_ratio|H/V]] and [[Spectral_amplitudes|Spectrum]] output files are different:
+<u>Note</u>: the output box must be checked and the destination folder selected '''before''' processing data, otherwise output files are not created.
-* [[H/V_spectral_ratio|H/V processing]]<br/>For each H/V curve two output files are created: a parameter file, ''name.log'', and a result file, ''name.hv'', where "''name''" stands for the station name.
 ** the ''.log'' file contains the H/V processing parameters and the windowing ([[Geopsy: H/V_parameter_file|Example]]).
 ** the ''.hv'' file contains the H/V curve ([[Geopsy: H/V_output_file|Example]]).
-* [[Spectral_amplitudes|Spectrum processing]]<br/>For each component (Z, N, and E) two output files are created: a parameter file, ''name_component.log'', and a result file, ''name_component.spec'', where "name" stands for the station name.
+* Spectrum processing<br/>For each component (Z, N, and E) two output files are created: a parameter file, ''name_component.log'', and a result file, ''name_component.spec'', where "name" stands for the station name.
 ** the ''.log'' files contain the Spectrum processing parameters and the windowing ([[Geopsy: Spectrum_parameter_file|Example]]).
 ** the ''.spec'' files contains the Fourier spectra curves ([[Geopsy: Spectrum_output_file|Example]]).
@@ Line 65: / Line 68: @@
 <br style="clear: both"/>
 == Load parameters and Start section ==

@@ Line 41: / Line 41: @@
 == Output section ==
-[[Image:HV_SPEC_toolb_output_output.png||thumb|right|300px|Unactivated ''Output'' section. Data is not saved.]][[Image:HV_SPEC_toolb_output_output_activated.png||thumb|right|300px|Activated ''Output'' section displaying where (on the hard drive) data is saved.]]
+[[Image:HV_SPEC_toolb_output_output.png||thumb|right|300px|Unactivated ''Output'' section. Data is not saved.]][[Image:HV_SPEC_toolb_output_output_activated.png||thumb|right|300px|Activated ''Output'' section displaying in wich directory data will be saved.]]
-[[Image:HV_SPEC_toolb_output_output_browser.png||thumb|right|300px|Browser to choose the folder to save the results. It is possible to create a folder.]]
+[[Image:HV_SPEC_toolb_output_output_browser.png||thumb|right|300px|Browser to choose the folder to save the results. It is possible to create a new folder.]]
-Results can be saved automatically while processing or after viewing the results ([[H/V spectral ratio#Saving results|Saving results]]). One file per station is created in the specified directory. First check the ''Output'' box. Then open the file browser by clicking on the ''browse'' button [[Image:SPEC_cursor.png]] and select the folder where to save the result files.
+Results can be saved automatically while processing or after viewing the results. One file per station is created in the specified directory. First check the ''Output'' box. Then open the file browser by clicking on the ''browse'' button [[Image:SPEC_cursor.png]] and select the folder where to save the result files.
 The [[H/V_spectral_ratio|H/V]] and [[Spectral_amplitudes|Spectrum]] output files are different:

← Older revision		Revision as of 16:13, 8 January 2013
Line 33:		Line 33:


−	[[Image:HV_SPEC_toolb_output_appearance.png\|300px\|''Appearance'' section.]]	+	[[Image:HV_SPEC_toolb_output_appearance.png\|\|thumb\|left\|300px\|''Appearance'' section.]]

	First check the ''Results make-up'' and/or the ''Summary make-up'' box. Then open the browser by clicking on the neighborhing cursor [[Image:SPEC_cursor.png]] and choose the appropriate [[SciFigs: Make-up\|make-up]] to apply to the output graphics so as to change its appearance.		First check the ''Results make-up'' and/or the ''Summary make-up'' box. Then open the browser by clicking on the neighborhing cursor [[Image:SPEC_cursor.png]] and choose the appropriate [[SciFigs: Make-up\|make-up]] to apply to the output graphics so as to change its appearance.

← Older revision		Revision as of 16:03, 8 January 2013
Line 33:		Line 33:


−	[[Image:HV_SPEC_toolb_output_appearance.png\|300px\|''Appearance'' section~~. Data is not saved~~.]]	+	[[Image:HV_SPEC_toolb_output_appearance.png\|300px\|''Appearance'' section.]]

	First check the ''Results make-up'' and/or the ''Summary make-up'' box. Then open the browser by clicking on the neighborhing cursor [[Image:SPEC_cursor.png]] and choose the appropriate [[SciFigs: Make-up\|make-up]] to apply to the output graphics so as to change its appearance.		First check the ''Results make-up'' and/or the ''Summary make-up'' box. Then open the browser by clicking on the neighborhing cursor [[Image:SPEC_cursor.png]] and choose the appropriate [[SciFigs: Make-up\|make-up]] to apply to the output graphics so as to change its appearance.

← Older revision		Revision as of 16:02, 8 January 2013
Line 33:		Line 33:


−	[[Image:HV_SPEC_toolb_output_appearance.png\|300px]]	+	[[Image:HV_SPEC_toolb_output_appearance.png\|300px\|''Appearance'' section. Data is not saved.]]
−

	First check the ''Results make-up'' and/or the ''Summary make-up'' box. Then open the browser by clicking on the neighborhing cursor [[Image:SPEC_cursor.png]] and choose the appropriate [[SciFigs: Make-up\|make-up]] to apply to the output graphics so as to change its appearance.		First check the ''Results make-up'' and/or the ''Summary make-up'' box. Then open the browser by clicking on the neighborhing cursor [[Image:SPEC_cursor.png]] and choose the appropriate [[SciFigs: Make-up\|make-up]] to apply to the output graphics so as to change its appearance.