jfreymue at gi.alaska.edu
Tue Mar 7 16:52:34 MST 2006
What kind of receiver is it? And does the time offset (the 0.223 sec)
start at zero and grow throughout the file? If so, and if the receiver
is a Trimble or some older Ashtechs and Leicas, then this is a problem
for the ClockPrep program to fix. If I have guessed the cause right,
your problem has been caused by the rinex conversion process, which was
dealing with the 1 millisecond clock offsets in those types of
receivers. For a long time the default behavior of all rinex converters
was to change the time tag when it encounters one of the millisecond
If you have the raw files, you can try "teqc +smtt" to force teqc to
convert without changing the time tags. This should be in all the
recent versions of teqc.
The other possibility is that your receiver really is sampling at that
odd time, which would be surprising but I'm sure it is possible. If you
receiver really was sampling 0.223 seconds off the minute, then you
probably could not really correct the error.
On Mar 7, 2006, at 11:43 AM, Daniele Barroca wrote:
> Good afternoon,
> I would like to know if it is possible to correct the
> GPS observables (of a RINEX file) of the receiver
> For example:
> 05 5 25 0 0 15.2230000 0 8G16G 3G22G14 ...
> 31687139.09146 24649869.97746 89193652.7594
> 4021695.90246 3073693.39846 89490059.7434
> 20737659.47748 16132538.86747 87108723.2594
> The observables are degraded by receiver error that is
> 0.223. Is it possible to correct the observables and
> consequently change 15.2230000 to 15.000???
> Thanks, Daniele Barroca.
> Sao Paulo State, Brazil.
> Yahoo! Acesso Grátis - Internet rápida e grátis. Instale o discador
> teqc mailing list
> teqc at ls.unavco.org
Dr. Jeffrey T. Freymueller Office: 907-474-7286
Geophysical Institute Fax: 907-474-7290
University of Alaska, Fairbanks Home: 907-479-3550
PO Box 757320 Cell: 907-322-7632
Fairbanks, AK 99775-7320 email: jeff at giseis.alaska.edu
Download Alaska GPS data: ftp://gps.alaska.edu/pub/gpsdata/
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Size: 2397 bytes
Desc: not available
Url : http://ls.unavco.org/pipermail/teqc/attachments/20060307/06ec6a0a/attachment.bin
More information about the teqc