GPS Professionals

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Comment by Antonie Kruger on November 15, 2009 at 1:07pm

rrmonillace, what is the tolerance of 'precise'? In my experience, if you are looking for anything better that 1cm vertically, you need to take out the digital level and put away the GPS, even if you do post processing with precise ephemeris of the SV's. I had the Leica guys at my office a while ago. They have a GPS product for monitoring that delivers good vertical results. I do not think it is an RTK system, though. My teams are not allowed to use GPS to place levels that require an accuracy of 20mm or less, even then you have to keep an eye on the VDOP.

Comment by Bill Englert on November 15, 2009 at 12:34pm

rrmonillace, I use Sokkia GPS eq. When I want to establish vertical controls, I do a 4 hr static collection at more than location, process the rinex file thru OPUS. I then add these points to my locaization file and use both horizontal and vertical. All other local points, I turn the vertical off. This may not be the best way but I know it has given me the best results when there isn't an established bench mark to work from.

Comment by rrmonillace on November 15, 2009 at 11:21am

anybody please help: "how to make precise levels using GPS >>>thales zmax<<<" localization option

thanks

Comment by Michael Elbert on November 8, 2009 at 2:48pm

Hi! my name is Michael Elbert,Jerusalem,Israel. I use extansively RTK Leica for controls for road alignment.
However accurate that might be I still adjust the traverse line,though some colleagues think it is a waste of time.
What is the practice you follow?

Comment by Bill Englert on October 26, 2009 at 8:52am

Grrrrr.... anyone have a Carlson Explorer II loaner? Another one bites the dust. Sending mine in for repairs and sure could use a loaner.

Comment by Jim on October 26, 2009 at 7:08am

Field testing the Trimble series one R8. Big difference noticed! Looking forward to the 3rd series show...

Comment by Jim on September 10, 2009 at 9:14am

Off to Jury duty i will check in Later welcome it is refreshing to have the chatter...

Comment by Jim on September 10, 2009 at 9:13am

This (GNSS)is a place to remain very humble. I see it like a nest of baby birds, mouth open and the feed me sonar turned as loud as it can be.

we just added 2 more satellites giving us 32 in our GPS constellation. Glonass, Galilaeo and Compass gaining population aswell. We have 5 constellations being tuned up as we type away...

L5, L2C are now sending great signal...yet they are still tweaking its ability and integrety.
This is all good news to those willing to seek it out and gain the knowledge as we share data.

Comment by FrankR on September 10, 2009 at 9:12am

I don't see the PDF's of the news article. It may be the way the download works if you have any suggestions let me know.

Comment by FrankR on September 10, 2009 at 9:09am

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