## Search found 7 matches

Wed Jul 18, 2012 7:40 am
Forum: General usage
Topic: Correlation analysis
Replies: 1
Views: 6748

### Re: Correlation analysis

Even more, I think my question is even more simple. How does Geopsy calculate correlations "with a reference signal"? For example if I want to use channel 1 as a reference signal does Geopsy calculate channel 1 respect to channel 2 or channel 2 respect to channel 1? The problem is that I obtain corr...
Tue Jul 17, 2012 8:58 am
Forum: General usage
Topic: Correlation analysis
Replies: 1
Views: 6748

### Correlation analysis

Hello, I'm working on correlating noise. We measured noise with a 22 geophone line with 1.5 m distance between geophones and we "caused" the noise walking from and to the first and to the last geophones in order to correlate the noise to obtain the Green Function. When I look at my records I can see...
Fri Feb 24, 2012 9:03 am
Forum: Geopsy usage
Topic: Pre-processing in ambient noise
Replies: 6
Views: 14508

### Re: Pre-processing in ambient noise

Ok. Thank you, I will try this and let you know the results or the new questions.
Wed Feb 22, 2012 2:47 pm
Forum: Geopsy usage
Topic: Pre-processing in ambient noise
Replies: 6
Views: 14508

### Re: Pre-processing in ambient noise

1. I mean the trigger was physically connected to channel 24, as we use an electronic device to "close the circuit" and make sure that we trigger all channels by the cost of loosing one channel. And I also meant we wrongly plugged it to channel 24 instead of channel 1. However, I think you already a...
Tue Feb 21, 2012 2:26 pm
Forum: Geopsy usage
Topic: Pre-processing in ambient noise
Replies: 6
Views: 14508

### Pre-processing in linear active source records

Hello, We recorded active source data for two different non synchronized geophone lines. We have some questions. 1.- There was a problem: we plugged our trigger to channel 24 instead of to channel 1 :oops: . Is there a way to modify the headers so we can consider channel 24 as channel 1? 2.- We have...
Mon Nov 07, 2011 1:37 pm
Forum: Miscellaneous
Topic: group velocity
Replies: 1
Views: 4557

### group velocity

Hello, We are working with correlation analysis of surface waves and we have already identify the train waves that we wamt to analyze. We want to estimate the group velocity for these train waves, however we couldn't find how to do it in geopsy. I guess it's possible but we couldn't find how to do i...
Mon Nov 07, 2011 1:34 pm
Forum: Geopsy usage
Topic: save results HV
Replies: 2
Views: 5822

### Re: save results HV

Hello, I'm interested on the HVfta as I've been working with theoretical ellipticity. However I haven't been able to save the *.max needed in max2curve. I'm working undser windows7 with geopsy 2.7.4 (geopsypack 2.4.2) I have also registered myself to download the HVfta plugin but probably I have to ...