More: [Acoustics] WinRiver 10.05 and GPS
Michael S Rehmel
msrehmel at usgs.gov
Tue Jul 22 15:48:59 CDT 2003
Chris,
If you have the PV filter set to off you might not be doing anything
wrong, but are running into the GPS/WinRiver 10.05 problem that Dave
Mueller mentioned in his original message. This problem only seems to
occur with certain combinations of GPS and laptops in WinRiver 10.05. Try
WinRiver 10.03 or 10.04 and see if that helps.
Mike
________________________________________________
Michael S. Rehmel phone: 317.290.3333 ext 158
U.S. Geological Survey fax: 317.290.3313
5957 Lakeside Blvd. email: msrehmel at usgs.gov
Indianapolis, IN 46278 web: http://in.water.usgs.gov
________________________________________________
"James B DeRose" <jbderose at usgs.gov>
Sent by: acoustics-admin at simon.er.usgs.gov
07/22/2003 11:13 AM
To: acoustics at simon.er.usgs.gov
cc:
Subject: Re: More: [Acoustics] WinRiver 10.05 and GPS
Yep, know excatly what it is. Make sure that PV Filter is set to "OFF".
Should do the trick. Sorry I somehow forgot to include that in my
original email. Probably the most important detail!! :)
JB
James B. DeRose
Electronic Technician
US Geological Survey
Placer Hall 6000 J Street
Sacramento, CA 95189
Ph (916) 278-3056
Cel (916) 826-4518
"Christopher A Curran" <ccurran at usgs.gov>
Sent by: acoustics-admin at simon.er.usgs.gov
07/22/2003 07:08 AM
To: acoustics at simon.er.usgs.gov
cc:
Subject: More: [Acoustics] WinRiver 10.05 and GPS
Any ideas?
In WA, we have just purchased a Trimble Ag132 w/ Omnistar. After our
first
time out we have data that looks like that below. In WinRiver, we had
only
GGA selected under reference, but were able to get BT data in the
playback.
We calibrated our compass and were using 115200 baud on the ADCP and
Argonaut laptop with a USB to DB9 adapter for the GPS. The GPS is on 4800
baud and we switched between 1 and 10Hz with no noticeable change. During
collection, WinRiver frequently alternates between GPS data "valid" and
"no
data". I'm not aware of any filtering selected on our GPS, so its using
default Omnistar setting. We're using WinRiver10.05. What are we doing
wrong here?
Thanks
------------------------------------------------------
Chris Curran
U.S. Geological Survey - WRD
Tacoma, WA
(253) 428-3600 x2614
|---------+--------------------------------->
| | "John Land" |
| | <johnland at drl.com> |
| | Sent by: |
| | acoustics-admin at simon.|
| | er.usgs.gov |
| | |
| | |
| | 06/04/03 06:48 AM |
| | |
|---------+--------------------------------->
>------------------------------------------------------------------------------------------------------------------------------|
| |
| To: <acoustics at simon.er.usgs.gov>, "David S Mueller"
<dmueller at usgs.gov> |
| cc: |
| Subject: Re: [Acoustics] WinRiver 10.05 and GPS |
>------------------------------------------------------------------------------------------------------------------------------|
One problem we have noted with WinRiver (versions earlier than 10.05) is
that nav data lines written to file can sometimes be truncated if you
record VTG data as well as GGA data. This results in track plots that
look
similar to the one you have illustrated. The (interim) solution seems to
be simply to record ONLY the GGA strings.
Regards,
John Land
----- Original Message -----
From: David S Mueller
To: acoustics at simon.er.usgs.gov
Sent: Tuesday, June 03, 2003 4:17 PM
Subject: [Acoustics] WinRiver 10.05 and GPS
WinRiver 10.05
===========
The USGS OSW recently announced the release on WinRiver 10.05.
Unfortunately, it seems no matter how much we test, bugs always make it
into the release and raise their head immediately after the release.
WinRiver 10.05 is no exception. Between WinRiver 10.04 and 10.05 a nonUSGS
customer of RDI reported problems with GPS. The RDI programmer modified
the GPS communications and decoding code. Our testing of WinRiver 10.05
didn't show any problems (we specifically had people test it with GPS).
However, since the release of WinRiver 10.05 we have had at least two
reports (one USGS, one outside USGS) where WinRiver 10.05 would not
properly decode their GPS. In both cases WinRiver 10.04 ran successfully.
We are working with RDI to fix this problem. If you or someone you know
has experienced this problem please contact me and/or RDI about the
problem. In the interim, if you need to use GPS keep WinRiver 10.03 or
10.04 available so that if you exper! ience a problem with 10.05 you can
proceed to collect data with an older version.
GPS Units
========
I have also received a couple of complaints about bad GPS referenced data.
The ship track often looks like:
(Embedded image moved to file: pic04485.gif)
Although I am not sure the exact cause, the filtering algorithms in the
GPS unit are a potential cause. We will continue to track down this
problem but remember to ALWAYS TURN OFF ALL FILTERING on your GPS unit.
David S. Mueller
U.S. Geological Survey
9818 Bluegrass Parkway
Louisville, KY 40299
------------------------------------
Voice: (502) 493-1935
Fax: (502) 493-1909
Email: dmueller at usgs.gov
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