[teqc] GeoGenius

Lou Estey lou at unavco.org
Wed Sep 1 07:38:32 MDT 2004

hi Andrew,

> I was under the impression that you knew everything!

Ha!  Hardly!

> Seems to be what is logged by Spectra Precision Terrasat software--not
> receiver specific.  Terrasat is a division of Spectra Precision and
> developed VRS.  Trimble bought Spectra Precision.  The software lives
> on...
> If you're really curious, try:
> http://www.gps-survey.com  --> File Download --> Observations --> etc
> This site used to have raw Ashtech, but now it's Ashtech in Terrasat
> clothing.  Not a huge deal, as there is rinex, but the rinex is pretty
> chopped up.

The first hour (I guess) for 31 Aug:

-rw-r--r--   1 lou      dmg         3780 Sep  1 07:01 WCM1244A.04a
-rw-r--r--   1 lou      dmg        24214 Sep  1 07:02 WCM1244A.04n
-rw-r--r--   1 lou      dmg       409900 Sep  1 07:03 WCM1244A.OBS
[1020] file W*
WCM1244A.04a:   ascii text
WCM1244A.04n:   ascii text
WCM1244A.OBS:   data

WCM1244A.04n is obviously a pretty normal RINEX nav file. WCM1244A.04a
appears to be some sort of stat matrix for the GPS SVs (PRN 1-31), and
WCM1244A.OBS must be the observations.  The first few lines of an octal
dump are interesting since there is some ASCII:

[1025] od -c W*.OBS | more
0000000   t   e   r   r   a   S   a   t 260 001 001  \0   A   S   H   T
0000020   E   C   H       Z   -   X   I   I   3  \0  \0  \0  \0  \0  \0
0000040   U   N   K   N   O   W   N  \0  \0  \0  \0  \0  \0  \0  \0  \0
0000060  \0  \0  \0  \0   6   J   0   0  \0  \0  \0  \0  \0  \0  \f  \0

So, given your intro, it's verified this is "terraSat" software and data
from an Ashtech Z-12.  But as to what is being bundled up and how, I have
no idea.  (For grins I tried a teqc metadata extraction using `-ash s`
and `-ash r` and got nothing.)

I did some Googling and found that GeoGenius refers to a software package
of Spectra Precision -- "the ultimate GPS processing toolset" one site
called it.

So what we have here is some software package (Terrasat? GeoGenius?)
which is part of Spectra Precision, now owned by Trimble, which slurps
up data from any receiver (e.g. Ashtech Z-12) and appears to spit out
the data into some other format, right?

Anybody have any insights?


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