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

David Zuliani dzuliani at inogs.it
Fri Mar 4 01:37:23 MST 2005


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
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
>
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