[teqc] decimating data w/ sampling rates > 2 Hz

David Zuliani dzuliani at inogs.it
Fri Mar 4 02:01:16 MST 2005


Lou

I've received this e-mail
I think you should attach
something into here :-)

Bye


----- Original Message ----- 
From: "David Zuliani" <dzuliani at inogs.it>
To: "teqc support" <teqc at ls.unavco.org>
Sent: Friday, March 04, 2005 9:37 AM
Subject: Re: [teqc] decimating data w/ sampling rates > 2 Hz


> Dear Lou,
> 
> I'm not sampling at higher rates tahn 1Hz
> so your beta release would work good
> for me, my current version of teqc is:
> 
> executable:  teqc
> version:     teqc  2003Sep15
> build:       Linux 2.0.36|Pentium II|gcc -static|Linux|486/DX+
> system time: 2005 Mar 04 08:30:53 UTC    GPS week= 1312
> contact:     Lou Estey (email: lou at unavco.ucar.edu ; tel: [+001] 
> 303-497-8036)
> email forum: teqc at unavco.ucar.edu 
> http://www.unavco.ucar.edu/html_mail/teqc/teqc.html
> 
> As you can see I need the Linux executable.
> 
> Bye and thanks
> 
> David
> 
> ----- Original Message ----- 
> From: "Lou Estey" <lou at unavco.org>
> To: <teqc at unavco.org>
> Sent: Thursday, March 03, 2005 6:03 PM
> Subject: [teqc] decimating data w/ sampling rates > 2 Hz
> 
> 
>> Yesterday I noticed that the current development code for
>> teqc would not correctly decimate data with original sampling
>> rates greater than 2 Hz, e.g. decimation of data with sample
>> intervals of 0.5 sec would work correctly, but decimation of
>> data with sample intervals of 0.2 s or 0.1 s would not.
>>
>> I'm not sure how far back in the teqc releases this problem
>> goes.  Anyway, I have a fix for the problem which has been
>> tested on 1-, 2-, 5-, and 10-Hz data.  If anyone needs an executable
>> to decimate data at rates > 2 Hz, please let me know.
>>
>> Also, I was wondering if anyone has any data sampled at rates
>> greater than 10 Hz.  (E.g. the JNS100 can sample L1 at 100 Hz.)
>> If you could send me one or two seconds worth of data (something
>> teqc can read or RINEX), I'd like to test the fixed decimation
>> algorithm at rates greater than 10 Hz.
>>
>> (The reason this gets tricky is having a decimation algorithm that
>> also deals with millisecond resets -- e.g. time tags in unsteered
>> receiver time -- and data at rates < 1 Hz not sampled on the
>> integer second.)
>>
>> cheers,
>> --lou
>>
>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> Louis H. Estey, Ph.D.              office:  [+001] 303-381-7456
>> UNAVCO, 6350 Nautilus Drive           FAX:  [+001] 303-381-7451
>> Boulder, CO  80301-5554            e-mail:  lou  unavco.org
>>    WWW:  http://www.unavco.org   http://jules.unavco.org
>>
>> "If the universe is the answer, what is the question?"
>>                                                -- Leon Lederman
>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>
>>
>> _______________________________________________
>> teqc mailing list
>> teqc at ls.unavco.org
>> http://ls.unavco.org/mailman/listinfo/teqc 
> 
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