[Qgis-user] Trimble GeoXT 2005 Accuracy

[kirk]

A few notes.sbas which is waas in north America is based on equatorial satellites which will get you in the 1 m range in southern Canada. you can achieve sub decimeter accuracy consistently using rtk ,either through a ntrip  caster (base station) broadcasting over the intenet or with your own base station and a radio link. there are a few chip sets and break out boards that you acquire and assemble your own system. This is a very inexpensive option.Another option in Canada is to use precise point positioning (PPP) which requires 6 to 12 hours of observation data using L1, L2 or L1 and L2 data and rinex log files. This comes in handy if you need to establish a remote base station.A proper antennae with a metal ground plane is also critical to getting quality results.Observing under a forested canopy is difficult especially in summer under leaf on conditions,  after a rain which creates multiparth mayhem.There is a reason survey grade equipment is relatively expensive. If you require repeatably accurate results in a variety of conditions this is an option.Kirk Schmidt Sent from my Galaxy
-------- Original message --------From: Jorge Gustavo Rocha <jgr at geomaster.pt> Date: 2021-03-06  6:41 p.m.  (GMT-04:00) To: qgis-user at lists.osgeo.org Subject: Re: [Qgis-user] Trimble GeoXT 2005 Accuracy 
    Hi,
    I just jump in this thread to say I'm really impressed with
      Ardusimple. I have a RTK Handheld Surveyor Kit [1] for +- 400 €
      and it works really well.
    I use the national NTRIP service and I have consistently
      precisions around 10 cm with just one receiver. 
    
    I use a free Android application called SW Maps [2]. My survey
      points, tracks and photos are collect in a geopackage that I can
      read in QGIS. I use it mostly to collect ground control points for
      my drone flights.
    
    Regards,
    Jorge Gustavo
    
    [1] https://www.ardusimple.com/product/rtk-handheld-surveyor-kit/
    [2]
      https://play.google.com/store/apps/details?id=np.com.softwel.swmaps
    Às 20:12 de 06/03/21, Greg Troxel
      escreveu:
    
    
      Springfield Harrison <stellargps at gmail.com> writes:


      
        Thanks Dan.  See my relies to Kirk and Greg.  The Emlid sounds
interesting, will have a look.

      
      I have an earlier Emlid Reach (not RS or RS2), which has L1 only, and I
never got it to work well.

Also look at the Ardusimple unit -- but it's more a parts kit than a
system.  You need a way to get RTK reference data in, and a good
antenna.  One approach is Vespucci (OSM editor for Android) as a
datalogger, and the Ardusimple WiFi NTRIP master to get corrections over
the phone's hotspot.

  https://www.ardusimple.com/product/simplertk2b/

      
      
      _______________________________________________
Qgis-user mailing list
Qgis-user at lists.osgeo.org
List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user

    
    -- 
      Email Signature
      
      
        
          
              
            
              
                
                  
                     Geomaster
                      Jorge Gustavo
                          Rocha 
                          | Software Engineer 
                  
                  
                     e: jgr at geomaster.pt
                       | m: +351 910 333 888
                         g: 41.54094,-8.40490
                       | v: 
                          510 906 109
                          a:  
                        Rua
                          António Cândido Pinto, 67, 4715-400 Braga
                         
                  
                
              
            
          
        
      
    
  

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/qgis-user/attachments/20210306/1cfb69df/attachment-0001.html>