<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"></head><body dir="auto"><div dir="auto">A few notes.</div><div dir="auto"><br></div><div dir="auto">sbas which is waas in north America is based on equatorial satellites which will get you in the 1 m range in southern Canada. </div><div dir="auto"><br></div><div dir="auto">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.</div><div dir="auto"><br></div><div dir="auto">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.</div><div dir="auto"><br></div><div dir="auto">A proper antennae with a metal ground plane is also critical to getting quality results.</div><div dir="auto"><br></div><div dir="auto">Observing under a forested canopy is difficult especially in summer under leaf on conditions, after a rain which creates multiparth mayhem.</div><div dir="auto"><br></div><div dir="auto">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.</div><div dir="auto"><br></div><div dir="auto">Kirk Schmidt </div><div dir="auto"><br></div><div dir="auto"><br></div><div dir="auto"><br></div><div dir="auto"><br></div><div dir="auto"><br></div><div dir="auto"><br></div><div dir="auto"><br></div><div id="composer_signature" dir="auto"><div style="font-size:85%;color:#575757" dir="auto">Sent from my Galaxy</div></div><div dir="auto"><br></div><div><br></div><div align="left" dir="auto" style="font-size:100%;color:#000000"><div>-------- Original message --------</div><div>From: Jorge Gustavo Rocha <jgr@geomaster.pt> </div><div>Date: 2021-03-06 6:41 p.m. (GMT-04:00) </div><div>To: qgis-user@lists.osgeo.org </div><div>Subject: Re: [Qgis-user] Trimble GeoXT 2005 Accuracy </div><div><br></div></div>
<p>Hi,</p>
<p>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.</p>
<p>I use the national NTRIP service and I have consistently
precisions around 10 cm with just one receiver. <br>
</p>
<p>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.<br>
</p>
<p>Regards,</p>
<p>Jorge Gustavo<br>
</p>
<p>[1] <a href="https://www.ardusimple.com/product/rtk-handheld-surveyor-kit/" class="moz-txt-link-freetext">https://www.ardusimple.com/product/rtk-handheld-surveyor-kit/</a></p>
<p>[2]
<a href="https://play.google.com/store/apps/details?id=np.com.softwel.swmaps" class="moz-txt-link-freetext">https://play.google.com/store/apps/details?id=np.com.softwel.swmaps</a></p>
<div class="moz-cite-prefix">Às 20:12 de 06/03/21, Greg Troxel
escreveu:<br>
</div>
<blockquote type="cite">
<pre wrap="" class="moz-quote-pre">Springfield Harrison <a href="mailto:stellargps@gmail.com" class="moz-txt-link-rfc2396E"><stellargps@gmail.com></a> writes:
</pre>
<blockquote type="cite">
<pre wrap="" class="moz-quote-pre">Thanks Dan. See my relies to Kirk and Greg. The Emlid sounds
interesting, will have a look.
</pre>
</blockquote>
<pre wrap="" class="moz-quote-pre">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.
<a href="https://www.ardusimple.com/product/simplertk2b/" class="moz-txt-link-freetext">https://www.ardusimple.com/product/simplertk2b/</a>
</pre>
<br>
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<strong><span style="font-size: 11pt; font-family:
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