[teqc] Strange results with trimble file

pierre zakia pzakia at yahoo.com
Wed Aug 11 12:03:18 MDT 2010


Lou,

I don't have Trimble's Converttorinex software, nor I know its options.
That's why I used  teqc and tried to compare the results.

Thank you for your very clear explanation and the reference to old posts.

Regards
Pierre




________________________________
De : Lou Estey <lou at unavco.org>
À : teqc <teqc at ls.unavco.org>
Cc : pierre zakia <pzakia at yahoo.com>
Envoyé le : Mer 11 août 2010, 15h 40min 44s
Objet : Re: [teqc] Strange results with trimble file

Pierre,

> Hi everybody, this is the first time I am posting. So please apologize
> if I didn't exactly follow the rules.

I suppose the only rule for members to know is that emails from members
larger than 40 KB are not automatically distributed to the list and
require approval.  Usually I discourage posting of data files to the list.

Your email had two attached files: a .t01 and a .10S.  I can't figure out
from your message below what the .10S is a qc of, but I suspect that it
based on the RINEX created by Trimble's Converttorinex.  Why?  Based on
your concern over the clock lines, the attached .10S shows that the RINEX
had millisecond jumps in the time tag and smooth phase and pseudorange
data.  This is one of two styles of RINEX that we long abandoned --
back in Oct 2006.  See http://ls.unavco.org/pipermail/teqc/2006/000414.html
and 2006 Oct 25 entry in http://facility.unavco.org/software/teqc/log.html

Or, to put it another way, Trimble's Converttorinex (run with whatever
options you had set with it) created RINEX equivalent to translation of
`teqc -smtt ...`, whereas the current teqc default is equivalent to
`teqc +smtt ...`.

(The translation to RINEX of 38621420.dat (from `rupkr00 -d 38621420.t01`)
using teqc, and then qc of the teqc-produced RINEX shows exactly what I
expect -- i.e. no strange results.)

The community at large agreed that RINEX with smooth time tags (i.e. the
epochs are +-0.5 ms within actual GPS time, and not a floating receiver
time) is the better approach.

cheers,
--lou

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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