PSN-L Message - Subject: Re: Question

window and = open Winquake does that help ? ----- Original Message -----=20 From: tchannel=20 To: psn=20 Sent: Wednesday, May 06, 2009 3:26 AM Subject: Question Hi Folks, I have a question about a .psn file or .sac. Is there = anyway to edit an unwanted spike from a data file. I had a .psn the = other day, that looked very nice except for a large noise spike at the = beginning. This noise was just someone walking around, or a door opening etc. It would have nice to be able to edit that out and save the change. = I know you can filter these out to some degree, but is there a way to = cut them out like one would do with a .wav file, using a sound file = editor? Thanks, Ted -------------------------------------------------------------------------= --- No virus found in this incoming message. Checked by AVG - www.avg.com=20 Version: 8.5.287 / Virus Database: 270.12.18/2096 - Release Date: = 05/04/09 17:51:00

Hi Folks, Thanks for several=20 ideas. I am using AmaSeis on one machine and WinSDR on the = others,=20 so I though I would try these various ideas on both.

I found one simple way to remove a = single=20 spike. It was pointed out I could save the winquake file as = a .txt,=20 open it in a word editing program, look for the offending spike, now as = numbers=20 and replace them with zero, or use adjacent numbers.

Here is an example,

I had a nice .psn file, 3/4 of the way = through it I=20 had a large spike, obvious just a spike of noise. I saved the .psn = as a=20 ..txt, opened it in Word. Now I have a list of 2500 = numbers, I=20 scrolled down the list of number until I was about 3/4 of the way=20 down. In that area I saw numbers in the 10 -20 30 -40 small = numbers=20 like that. In this area I found three or four numbers in the=20 100's. These were the spike, I replaced all four numbers = with zeros,=20 save the file. Reopened it in Winquake and the spike was=20 gone.

This may not the best way to do = it, perhaps,=20 but it was very simple, and it worked on those one or two offending=20 spikes.

Thanks, Ted

----- Original Message -----

From:=20 Dale Hardy=20

To: psn-l@..............

Sent: Tuesday, May 05, 2009 = 5:29 PM

Subject: Re: Question

Hi Ted,

If you are using WinSDR you can = use

File> Replay

select the channel and time including = the time=20 span

click Start>

in the replayed window click a = point after=20 after your 'glitch' and

File> Zero Data

Then repeat the process of = Replay> select=20 the <Save Event> window and open Winquake

does that help ?

----- Original Message -----

From:=20 tchannel

To: psn

Sent: Wednesday, May 06, 2009 = 3:26=20 AM

Subject: Question

Hi Folks, I have a = question about a=20 .psn file or .sac. Is there anyway to edit an unwanted = spike=20 from a data file. I had a .psn the other day, that = looked very=20 nice except for a large noise spike at the beginning.

This noise was just someone walking = around, or=20 a door opening etc.

It would have nice to be able to = edit that out=20 and save the change. I know you can filter these out to some degree, = but is=20 there a way to cut them out like one would do with a .wav file, = using a=20 sound file editor?

Thanks, Ted

No virus found in this incoming message.
Checked by = AVG -=20 www.avg.com
Version: 8.5.287 / Virus Database: 270.12.18/2096 - = Release=20 Date: 05/04/09 17:51:00

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