Search found 6 matches

by lukemilner
Sat Jan 23, 2021 2:49 am
Forum: Geopsy usage
Topic: Removing Instrumental Response
Replies: 5
Views: 85520

Removing Instrumental Response

Hi Marc, I am using ambient data recorded by the British Geological Survey (BGS) in MiniSEED format, available online via the following link: http://earthquakes.bgs.ac.uk/monitoring/data_archive.html I am trying to deconvolve the instrument response- so I have a more scientific unit (i.e displacemen...
by lukemilner
Sun Jan 10, 2021 3:48 pm
Forum: Geopsy usage
Topic: Export Microtremor Results in Frequency domain
Replies: 6
Views: 19596

Re: Export Microtremor Results in Frequency domain

Also, I am not sure what the units for the Fourier Amplitude Spectrum are according to the Geopsy FFT. The data I uploaded in the time domain was in terms of 'counts' (i.e. counts vs time) and after applying the FFT the y axis (i.e. the Fourier Amplitude spectrum') is labelled with 'counts/sqrt(Hz)'...
by lukemilner
Sat Jan 09, 2021 1:47 am
Forum: Geopsy usage
Topic: Export Microtremor Results in Frequency domain
Replies: 6
Views: 19596

Re: Export Microtremor Results in Frequency domain

Hi Marc, Thanks for getting back to me. I just wanted to clarify- for the 'frequency (amplitude)' plot (under view) I assume this displays the 'real' component (i.e. the second column in the .txt file), whilst the 'frequency (phase)' plot displays the 'imaginary' component (i.e. the third column in ...
by lukemilner
Thu Jan 07, 2021 8:39 pm
Forum: Geopsy usage
Topic: Export Microtremor Results in Frequency domain
Replies: 6
Views: 19596

Export Microtremor Results in Frequency domain

Hi Marc, I was wondering if there was a method to export results in the frequency domain using Geopsy. I have imported data in the time domain, and applied the FFT (by selecting view --> frequency (amplitude)). Now I want to export the results, ideally as a .hv file. I know that there is a way of do...
by lukemilner
Mon Jan 04, 2021 4:08 pm
Forum: Geopsy usage
Topic: H/V Toolbox Questions ( on Windows- using version 3.3.4)
Replies: 2
Views: 11218

Re: H/V Toolbox Questions ( on Windows- using version 3.3.4)

Hi Marc,

Thank you very much- that makes much more sense now.

Luke
by lukemilner
Mon Jan 04, 2021 12:51 am
Forum: Geopsy usage
Topic: H/V Toolbox Questions ( on Windows- using version 3.3.4)
Replies: 2
Views: 11218

H/V Toolbox Questions ( on Windows- using version 3.3.4)

Dear Marc, I have a couple of questions about the H/V toolbox in Geopsy. Under the Processing tab, there is the option to apply a taper- I am choosing to apply a Cosine taper. I have seen in previous versions of the software an option for modifying the width of the cosine taper (i.e. giving a percen...