[teqc] Missing information in qc report with teqc version 2018Jan11

Lou Estey lou at unavco.org
Tue Feb 6 06:54:02 MST 2018


Juan,

On 06-Feb-18 06:12 AM, Juan Antonio wrote:
> I have been using till now teqc version 2016Nov7 for editing and quality checking without any problem. My kernel is 4.9.0-5-amd64. I have 
> changed teqc to version 2018Jan11 (dynamically and statically-linked, from CentOS and RedHat) and I have obtained always the same 
> differences respect to old version. I would like knowing why it happens, if it is something that new version of teqc does not contemplate or 
> it works badly in mi case.
> 
> Using option: teqc +qc -nav brdc0320.18n palm0320.18o
> 
> teqc  2016Nov7    build: Linux 2.4.21-27.ELsmp|Opteron|gcc|Linux x86_64|=+
> ---------------------
>        Processing parameters are:
>        Rx tracking capability  : 14 SVs
>        Orbit path spline fit sample time  : 10 min
> 
> teqc 2018Jan11    build: Linux 2.6.32-573.12.1.x86_64|x86_64|gcc -static|Linux 64|=+
> ---------------------
>         Processing parameters are:
>         Rx tracking capability  : unknown
>        (The line "Orbit..." is missing)

The first item is related to the now obsolete (and no longer supported)
'+igs' and '++igs' options; see https://postal.unavco.org/pipermail/teqc/2016/002140.html
As stated in that email, the next version which happened to be version 2016Nov7,
was the last version trying to support that functionality.  It's now gone.  Forever.
A minor thing it did, although with an increasing deviation from reality
in later years, was try to give the user an idea of the SV tracking capability
of the receiver in the qc summary.  Now that job is yours.  Use the
'-max_rx_SVs #' option to set the number, #, to the correct value:

-max_rx_SVs #        set maximum # of SVs trackable (per OBS epoch) based on receiver type

(The onus of getting that value correct is now on you, not me.)

The second item is merely switching from a slightly faster, but not as accurate,
method of estimating the SV elevation and azimuth to a slightly slower method
based entirely on ICD SV position calculations.  (The old method would use
the ICD SV position calculations at N minute intervals to build up a set of
XYZ curves from which the intermediate XYZ SV positions were estimated by
cubic spline fits using 4 points of the XYZ curves around the time of interest.
Now teqc uses a direct calculation of the SV XYZ position at each time of
interest using ICD procedures.)  So that spline fit interval is no longer used.

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

"If the universe is the answer, what is the question?"
                                                -- Leon Lederman
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