[teqc] Trimble DAT file Conversion - Data Gaps

Graeme Holloway Graeme.Holloway at landgate.wa.gov.au
Wed Mar 28 19:20:30 MDT 2007


I can report that I am also experiencing 600sec gaps in Trimble data
collected with the same equipment ie NetR5 receiver and Trimble Zephr
GNSS Geodetic Model 2 antenna

The attached screen shot is of 24hours of GPS data (Trimble .dat files)
viewed using the ObsEdit function in Trimble Total Control (TTC). See
gap 535800-536400

Using the +mds option results in the following warning from teqc 

unknown Trimble receiver type (Record 5)= 45
Record 16.29: latitude=  -32.71356178
Record 16.29: longitude= +116.06254897
Record 16.29: height= 0233.579
! Notice ! 2007 Feb 17 05:00:00.003: poss. incr. of sampling int. OR
data gap of
 600.000 seconds (min. dt found= 15.000 s)

This shows that the problem is not unique and is totally independent of
Teqc.

Please contact me if I can be of further assistance.





-----Original Message-----
From: teqc-bounces at ls.unavco.org [mailto:teqc-bounces at ls.unavco.org] On
Behalf Of Kerry Matthews
Sent: Thursday, 29 March 2007 5:30 AM
To: teqc support
Subject: Re: [teqc] Trimble DAT file Conversion - Data Gaps


Antenna is a Trimble Zephr GNSS Geodetic Model 2 (55971.00)
 
Quoting Lou Estey <lou at unavco.org>:

> hi Kerry,
> 
> ... and what do you get if you translate NetR5 .dat files with Trimble

> software? continuous epochs, or gaps in the same place?  (teqc must be

> reading at least a
> good chunk of the .dat records, otherwise the start/end times using
> +mds wouldn't
> make any sense)
> 
> BTW, your probing answers _one_ question:
> 
> teqc +mds 10570751.dat
> unknown Trimble receiver type (Record 5)= 45
> unknown Trimble antenna type (Record 16)= "GS"
> 
> So now I know receiver type "45" is a NetR5.  What was the antenna 
> that you were using?
> 
> --lou
> 
> > Lou,
> > 
> > The following is the TEQC +mds output from 4 consecutive 12 hour
> files. The ! Notice ! message and number of warnings are the same as 
> when
> > converting to Rinex. The resulting Rinex files do show these
> intervals as Epochs without data.
> > 
> > The output is the same regardless of TEQC version.
> > 
> > This NetR5 is not recording Glonass as this point.
> > 
> > Regards, Kerry.
> > 
> > 
> > 
> ----------------------------------------------------------------------
> ----------
> > C:\Proj\teqc +mds 10570751.dat
> > unknown Trimble receiver type (Record 5)= 45
> > unknown Trimble antenna type (Record 16)= "GS"
> > ! Notice ! 2007 Mar 16 18:20: 0.000: possible increase of session
> sampling inter
> > val OR data gap of 600.000000 seconds
> > ! Notice ! 2007 Mar 16 19:20: 0.000: possible increase of session
> sampling inter
> > val OR data gap of 600.000000 seconds
> > ! Notice ! 2007 Mar 16 20:20: 0.000: possible increase of session
> sampling inter
> > val OR data gap of 600.000000 seconds
> > 2007-03-16 12:00: 0  2007-03-16 23:59:58  16173517  10570751.dat
> > 
> > C:\Proj\teqc +mds 10570760.dat
> > unknown Trimble receiver type (Record 5)= 45
> > unknown Trimble antenna type (Record 16)= "GS"
> > 2007-03-17 00:00: 0  2007-03-17 11:59:58  16093166  10570760.dat
> > 
> > C:\Proj\teqc +mds 10570761.dat
> > unknown Trimble receiver type (Record 5)= 45
> > unknown Trimble antenna type (Record 16)= "GS"
> > ! Notice ! 2007 Mar 17 13:20: 0.000: possible increase of session
> sampling inter
> > val OR data gap of 600.000000 seconds
> > ! Notice ! 2007 Mar 17 14:20: 0.000: possible increase of session
> sampling inter
> > val OR data gap of 600.000000 seconds
> > ! Notice ! 2007 Mar 17 15:20: 0.000: possible increase of session
> sampling inter
> > val OR data gap of 600.000000 seconds
> > ! Notice ! 2007 Mar 17 16:20: 0.000: possible increase of session
> sampling inter
> > val OR data gap of 600.000000 seconds
> > 2007-03-17 12:00: 0  2007-03-17 23:59:58  15859848  10570761.dat
> > 
> > C:\Proj/teqc +mds 10570770.dat
> > unknown Trimble receiver type (Record 5)= 45
> > unknown Trimble antenna type (Record 16)= "GS"
> > ! Notice ! 2007 Mar 11 10:20: 0.000: possible increase of session
> sampling inter
> > val OR data gap of 600.000000 seconds
> > ! Notice ! 2007 Mar 11 11:20: 0.000: possible increase of session
> sampling inter
> > val OR data gap of 600.000000 seconds
> > 2007-03-11 00:00: 0  2007-03-11 11:59:58  15644138  10570770.dat
> _______________________________________________
> teqc mailing list
> teqc at ls.unavco.org
> http://ls.unavco.org/mailman/listinfo/teqc
> 
> 
> 
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