<div dir="ltr">All,<div><br></div><div>This is a very nice demonstration of a rapidly advancing technology based on what is known as real time kinematic (RTK) positioning combined with Global Navigation Satellite System GNSS [generic form of GPS]</div><div><br></div><div>see for example</div><div><a href="https://www.quectel.com/library/rtk-correction-services-white-paper/?creative=714667537585&keyword=gnss&matchtype=b&network=g&device=c&gad_source=1&gclid=Cj0KCQjw99e4BhDiARIsAISE7P9bWsmOeKo6dZy8b7apWcdqS4EqeF8VNSGLhicaAM11dTq5TgTW8T8aAiRHEALw_wcB">https://www.quectel.com/library/rtk-correction-services-white-paper/?creative=714667537585&keyword=gnss&matchtype=b&network=g&device=c&gad_source=1&gclid=Cj0KCQjw99e4BhDiARIsAISE7P9bWsmOeKo6dZy8b7apWcdqS4EqeF8VNSGLhicaAM11dTq5TgTW8T8aAiRHEALw_wcB</a></div><div><br></div><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Although GNSS offers ubiquitous coverage worldwide, its accuracy can be hindered in some situations – signals can be attenuated by heavy vegetation, for example, or obstructed by tall buildings in dense urban canyons. This results in signals being received indirectly or via the multipath effect, leading to inaccuracy, or even blocked entirely. Unimpeded GNSS positioning in all real world scenarios is therefore unrealistic – creating a need for supporting technologies, such as real time kinematic (RTK) positioning and dead reckoning, to enable centimeter-accuracy for newer mass-market IoT devices.</blockquote><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">RTK techniques can mitigate biases and degradations, greatly improving accuracy by communicating corrections from fixed base stations with known coordinates in the proximity of the roving device, providing position data in real time via a cellular, broadcast radio or satellite carrier. RTK uses carrier- phase differentials to compensate for errors from satellite orbit and clock inaccuracies and atmospheric conditions. Compensations are then accessed by the mobile receiver, such as a delivery robot or e-scooter, which uses them to calculate its own precise position relative to the fixed stations.</blockquote><div><br></div><div>and</div><div><a href="https://www.microstrain.com/inertial-sensors/3dm-gx5-45">https://www.microstrain.com/inertial-sensors/3dm-gx5-45</a></div><div><br></div><div><br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">MicroStrain's cost-effective IMU, AHRS and GNSS/INS sensors are a trusted product in Unmanned Aerial Vehicles (UAVs), Unmanned Ground Vehicles (UGVs), and Drone navigation and tracking. Our miniature, lightweight sensors can be deployed in a variety of defense and commercial autonomous platforms to improve the accuracy and reliability of navigation and tracking</blockquote><div><br></div><div>and</div><div><a href="https://northsurveying.com/index.php/soporte/gnss-and-geodesy-concepts">https://northsurveying.com/index.php/soporte/gnss-and-geodesy-concepts</a></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">GPS, GNSS and Geodesy Concepts </blockquote><div><br></div><div>Ted</div><div><br></div><div>PS: -- Perhaps we could arrange [one way or another] to have a talk on this for LCTG </div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Oct 21, 2024 at 1:56 PM David Lees via LCTG <<a href="mailto:lctg@lists.toku.us">lctg@lists.toku.us</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div>Mitch,</div><div>Thank you so much for posting this video, since I am traveling and was unable to attend.</div><div><br></div><div>David Lees<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Oct 21, 2024 at 12:07 PM Mitchell I. Wolfe via LCTG <<a href="mailto:lctg@lists.toku.us" target="_blank">lctg@lists.toku.us</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div style="font-size:10pt;font-family:Verdana,Geneva,sans-serif">
<div style="font-size:10pt;font-family:Verdana,Geneva,sans-serif">
<div style="font-size:10pt;font-family:Verdana,Geneva,sans-serif">
<div style="font-size:10pt;font-family:Verdana,Geneva,sans-serif">
<p><a href="https://www.youtube.com/watch?v=WHZSkFZ9fcc" rel="noopener noreferrer" target="_blank">Here</a> is a 15 minute video of last night's Lexington drone show. You really should have been there...</p>
<p>-- Mitch</p>
<p id="m_-3749428619889615697m_-492230859078511057v1v1v1reply-intro">On 2024-10-10 20:38, Mitchell I. Wolfe wrote:</p>
<blockquote type="cite" style="padding:0px 0.4em;border-left:2px solid rgb(16,16,255);margin:0px">
<div id="m_-3749428619889615697m_-492230859078511057v1v1v1replybody1" style="font-size:10pt;font-family:Verdana,Geneva,sans-serif">
<div style="font-size:10pt;font-family:Verdana,Geneva,sans-serif">
<p>There should be four hundred drones in Lexington MA on Sunday October 20th after 6:30 PM at the Lexington <a href="https://www.tourlexington.us/event/lexington-250-weekend-of-light-drone-show/" rel="noopener noreferrer" target="_blank">Weekend of Light Drone Show Extravaganza</a>.</p>
<p>-- Mitch</p>
<p id="m_-3749428619889615697m_-492230859078511057v1v1v1v1v1reply-intro">On 2024-09-18 15:23, Mitchell I. Wolfe wrote:</p>
<blockquote style="padding:0px 0.4em;border-left:2px solid rgb(16,16,255);margin:0px">
<div id="m_-3749428619889615697m_-492230859078511057v1v1v1v1v1replybody1" style="font-size:10pt;font-family:Verdana,Geneva,sans-serif">
<div style="font-size:10pt;font-family:Verdana,Geneva,sans-serif">
<div style="font-size:10pt;font-family:Verdana,Geneva,sans-serif">
<p><span style="font-size:12pt">The Sky Elements <a href="https://skyelementsdrones.com/support-help-faq/" rel="noopener noreferrer" target="_blank">FAQ</a> suggests that drone shows could be performed even indoors "<span style="color:rgb(51,51,51);font-family:Lato;background-color:rgb(255,255,255)"><em><span style="font-family:verdana,geneva,sans-serif">in suitable venues with adequate space and safety measures in place</span></em>."</span></span></p>
<p>-- Mitch</p>
<p id="m_-3749428619889615697m_-492230859078511057v1v1v1v1v1v1v1v1reply-intro">On 2024-09-18 14:37, <a href="mailto:rosesta@gmail.com" target="_blank">rosesta@gmail.com</a> wrote:</p>
<blockquote style="padding:0px 0.4em;border-left:2px solid rgb(16,16,255);margin:0px">
<div id="m_-3749428619889615697m_-492230859078511057v1v1v1v1v1v1v1v1replybody1" lang="EN-US">
<div>
<p><span style="font-size:11pt">I thought they were really impressive. Since AGT seemed to be taking the video of it with a camera drone that was probably controlled by AGT and that drone flew right through the middle of the show drones, I was wondering how they avoided a collision? </span></p>
<p><span style="font-size:11pt"> </span></p>
<p><span style="font-size:11pt">The winner gets a show in Vegas but I wonder how they would stage a drone show?</span></p>
<p><span style="font-size:11pt"> </span></p>
<p><span style="font-size:11pt">Stan</span></p>
<p><span style="font-size:11pt"> </span></p>
<div>
<div style="border-width:1pt medium medium;border-style:solid none none;border-color:rgb(225,225,225) currentcolor currentcolor;padding:3pt 0in 0in">
<p><strong><span style="font-size:11pt;font-family:Calibri,sans-serif">From:</span></strong><span style="font-size:11pt;font-family:Calibri,sans-serif"> LCTG <lctg-bounces+rosesta=<a href="mailto:gmail.com@lists.toku.us" target="_blank">gmail.com@lists.toku.us</a>> <strong>On Behalf Of </strong>Mitchell I. Wolfe via LCTG<br><strong>Sent:</strong> Wednesday, September 18, 2024 2:24 PM<br><strong>To:</strong> Donald Cooke <<a href="mailto:doncooke2@gmail.com" target="_blank">doncooke2@gmail.com</a>><br><strong>Cc:</strong> Lex Computer Group <<a href="mailto:lctg@lists.toku.us" target="_blank">lctg@lists.toku.us</a>><br><strong>Subject:</strong> Re: [Lex Computer & Tech Group/LCTG] Boston Dynamics vs football halftime</span></p>
</div>
</div>
<p> </p>
<div>
<div>
<p><span style="font-size:10pt;font-family:Verdana,sans-serif;color:rgb(51,51,51);background:white">On AGT, see Sky Elements' Dazzling Drone Light Shows [hundreds in coordinated swarms]:</span><span style="font-size:9pt;font-family:"Courier New";color:rgb(51,51,51)"><br><br></span><span style="font-size:10pt;font-family:Verdana,sans-serif;color:rgb(51,51,51);background:white"> </span><span style="font-size:10pt;font-family:Verdana,sans-serif"><a href="https://www.youtube.com/watch?v=MO7cGJq-Bkw" rel="noopener noreferrer" target="_blank"><span style="color:rgb(0,105,166);background:white">https://www.youtube.com/watch?v=MO7cGJq-Bkw</span></a></span><span style="font-size:9pt;font-family:"Courier New";color:rgb(51,51,51)"><br><br></span><span style="font-size:10pt;font-family:Verdana,sans-serif;color:rgb(51,51,51);background:white"> </span><span style="font-size:10pt;font-family:Verdana,sans-serif"><a href="https://www.youtube.com/watch?v=AddyPIayHeI" rel="noopener noreferrer" target="_blank"><span style="color:rgb(0,105,166);background:white">https://www.youtube.com/watch?v=AddyPIayHeI</span></a></span><span style="font-size:9pt;font-family:"Courier New";color:rgb(51,51,51)"><br><br></span><span style="font-size:10pt;font-family:Verdana,sans-serif;color:rgb(51,51,51);background:white"> </span><span style="font-size:10pt;font-family:Verdana,sans-serif"><a href="https://www.youtube.com/watch?v=brEXrQBIj68" rel="noopener noreferrer" target="_blank"><span style="color:rgb(0,105,166);background:white">https://www.youtube.com/watch?v=brEXrQBIj68</span></a></span><span style="font-size:9pt;font-family:"Courier New";color:rgb(51,51,51)"><br><br></span><span style="font-size:10pt;font-family:Verdana,sans-serif;color:rgb(51,51,51);background:white">Drone light shows may replace fireworks performances once technology is more widespread. Looks like most public shows are in western US, such as:</span><span style="font-size:9pt;font-family:"Courier New";color:rgb(51,51,51)"><br></span><span style="font-size:10pt;font-family:Verdana,sans-serif;color:rgb(51,51,51);background:white"> </span><span style="font-size:10pt;font-family:Verdana,sans-serif"><a href="https://skyelementsdrones.com/where-to-see-a-drone-light-show/" rel="noopener noreferrer" target="_blank"><span style="color:rgb(0,105,166);background:white">https://skyelementsdrones.com/where-to-see-a-drone-light-show/</span></a></span><span style="font-size:9pt;font-family:"Courier New";color:rgb(51,51,51)"><br><br></span><span style="font-size:10pt;font-family:Verdana,sans-serif;color:rgb(51,51,51);background:white">-- Mitch</span><span style="font-size:10pt;font-family:Verdana,sans-serif"></span></p>
<p><span style="font-size:10pt;font-family:Verdana,sans-serif">On 2024-09-18 14:12, Donald Cooke via LCTG wrote:</span></p>
<blockquote style="border-width:medium medium medium 1.5pt;border-style:none none none solid;border-color:currentcolor currentcolor currentcolor rgb(16,16,255);padding:0in 0in 0in 5pt;margin-left:0in;margin-right:0in">
<div id="m_-3749428619889615697m_-492230859078511057v1v1v1v1v1v1v1v1v1v1v1replybody1">
<div>
<p><span style="font-size:10pt;font-family:Verdana,sans-serif"> More Boston Dynamics: Love the difference in reactions between the girl in the pink hat and the (slightly older) boy in t-shirt and red sneakers. </span></p>
<div>
<p><span style="font-size:10pt;font-family:Verdana,sans-serif"> </span></p>
</div>
<div>
<p><span style="font-size:10pt;font-family:Verdana,sans-serif"><a href="https://u.pcloud.link/publink/show?code=XZUhTU0Z9i1HtgtpgEJdx7aWOzynLzHPDQ1y" rel="noopener noreferrer" target="_blank">https://u.pcloud.link/publink/show?code=XZUhTU0Z9i1HtgtpgEJdx7aWOzynLzHPDQ1y</a></span></p>
</div>
<div>
<p><span style="font-size:10pt;font-family:Verdana,sans-serif"> </span></p>
</div>
<div>
<p><span style="font-size:10pt;font-family:Verdana,sans-serif">My video, at Edwards AFB open house.<br clear="all"></span></p>
<div>
<div>
<div>
<div>
<p><span style="font-size:10pt;font-family:Verdana,sans-serif"> </span></p>
</div>
<p><span style="font-size:10pt;font-family:Verdana,sans-serif"><img id="m_-3749428619889615697m_-492230859078511057v1v1v1v1v1v1v1v1v1_x0000_i1025" style="width: 1.0416in; height: 0.6458in;" width="100" height="62" border="0"></span><span style="font-size:10pt;font-family:Verdana,sans-serif"></span></p>
<div>
<p><span style="font-size:10pt;font-family:Verdana,sans-serif">Don Cooke, Site 523, 603.219.9259</span></p>
</div>
</div>
</div>
</div>
</div>
</div>
<p><span style="font-size:10pt;font-family:Verdana,sans-serif"> </span></p>
<div>
<div>
<p><span style="font-size:10pt;font-family:Verdana,sans-serif">On Wed, Sep 18, 2024 at 10:39 AM Peter Albin via LCTG <<a href="mailto:lctg@lists.toku.us" rel="noreferrer" target="_blank">lctg@lists.toku.us</a>> wrote:</span></p>
</div>
<blockquote style="border-width:medium medium medium 1pt;border-style:none none none solid;border-color:currentcolor currentcolor currentcolor rgb(204,204,204);padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<p><span style="font-size:10pt;font-family:Verdana,sans-serif"><a href="https://youtu.be/vHkTOFZwE5Y" rel="noopener noreferrer" target="_blank">https://youtu.be/vHkTOFZwE5Y</a><br><br>Peter<br>===============================================<br>::The Lexington Computer and Technology Group Mailing List::<br>Reply goes to sender only; Reply All to send to list.<br>Send to the list: <a href="mailto:LCTG@lists.toku.us" rel="noreferrer" target="_blank">LCTG@lists.toku.us</a> Message archives: <a href="http://lists.toku.us/pipermail/lctg-toku.us/" rel="noopener noreferrer" target="_blank">http://lists.toku.us/pipermail/lctg-toku.us/</a><br>To subscribe: email <a href="mailto:lctg-subscribe@toku.us" rel="noreferrer" target="_blank">lctg-subscribe@toku.us</a> To unsubscribe: email <a href="mailto:lctg-unsubscribe@toku.us" rel="noreferrer" target="_blank">lctg-unsubscribe@toku.us</a><br>Future and Past meeting information: <a href="http://LCTG.toku.us" rel="noopener noreferrer" target="_blank">http://LCTG.toku.us</a><br>List information: <a href="http://lists.toku.us/listinfo.cgi/lctg-toku.us" rel="noopener noreferrer" target="_blank">http://lists.toku.us/listinfo.cgi/lctg-toku.us</a><br>This message was sent to <a href="mailto:doncooke2@gmail.com" rel="noreferrer" target="_blank">doncooke2@gmail.com</a>.<br>Set your list options: <a href="http://lists.toku.us/options.cgi/lctg-toku.us/doncooke2@gmail.com" rel="noopener noreferrer" target="_blank">http://lists.toku.us/options.cgi/lctg-toku.us/doncooke2@gmail.com</a></span></p>
</blockquote>
</div>
</div>
<p><span style="font-size:10pt;font-family:Verdana,sans-serif"> </span></p>
<div>
<p><span style="font-size:10pt;font-family:Verdana,sans-serif">===============================================<br>::The Lexington Computer and Technology Group Mailing List::<br>Reply goes to sender only; Reply All to send to list.<br>Send to the list: <a href="mailto:LCTG@lists.toku.us" rel="noreferrer" target="_blank">LCTG@lists.toku.us</a> Message archives: <a href="http://lists.toku.us/pipermail/lctg-toku.us/" rel="noopener noreferrer" target="_blank">http://lists.toku.us/pipermail/lctg-toku.us/</a><br>To subscribe: email <a href="mailto:lctg-subscribe@toku.us" rel="noreferrer" target="_blank">lctg-subscribe@toku.us</a> To unsubscribe: email <a href="mailto:lctg-unsubscribe@toku.us" rel="noreferrer" target="_blank">lctg-unsubscribe@toku.us</a><br>Future and Past meeting information: <a href="http://LCTG.toku.us" rel="noopener noreferrer" target="_blank">http://LCTG.toku.us</a><br>List information: <a href="http://lists.toku.us/listinfo.cgi/lctg-toku.us" rel="noopener noreferrer" target="_blank">http://lists.toku.us/listinfo.cgi/lctg-toku.us</a><br>This message was sent to <a href="mailto:mwolfe@vinebrook.com" rel="noreferrer" target="_blank">mwolfe@vinebrook.com</a>.<br>Set your list options: <a href="http://lists.toku.us/options.cgi/lctg-toku.us/mwolfe@vinebrook.com" rel="noopener noreferrer" target="_blank">http://lists.toku.us/options.cgi/lctg-toku.us/mwolfe@vinebrook.com</a></span></p>
</div>
</blockquote>
<p><span style="font-size:10pt;font-family:Verdana,sans-serif"> </span></p>
</div>
</div>
</div>
</div>
</blockquote>
<p><br></p>
<div id="m_-3749428619889615697m_-492230859078511057v1v1v1v1v1v1v1v1_rc_sig"></div>
</div>
</div>
</div>
</blockquote>
<p><br></p>
<div id="m_-3749428619889615697m_-492230859078511057v1v1v1v1v1_rc_sig"></div>
</div>
</div>
</blockquote>
<p><br></p>
<div id="m_-3749428619889615697m_-492230859078511057v1v1v1_rc_sig"></div>
</div>
</div>
</div>
</div>
===============================================<br>
::The Lexington Computer and Technology Group Mailing List::<br>
Reply goes to sender only; Reply All to send to list.<br>
Send to the list: <a href="mailto:LCTG@lists.toku.us" target="_blank">LCTG@lists.toku.us</a> Message archives: <a href="http://lists.toku.us/pipermail/lctg-toku.us/" rel="noreferrer" target="_blank">http://lists.toku.us/pipermail/lctg-toku.us/</a><br>
To subscribe: email <a href="mailto:lctg-subscribe@toku.us" target="_blank">lctg-subscribe@toku.us</a> To unsubscribe: email <a href="mailto:lctg-unsubscribe@toku.us" target="_blank">lctg-unsubscribe@toku.us</a><br>
Future and Past meeting information: <a href="http://LCTG.toku.us" rel="noreferrer" target="_blank">http://LCTG.toku.us</a><br>
List information: <a href="http://lists.toku.us/listinfo.cgi/lctg-toku.us" rel="noreferrer" target="_blank">http://lists.toku.us/listinfo.cgi/lctg-toku.us</a><br>
This message was sent to <a href="mailto:joeoptics@gmail.com" target="_blank">joeoptics@gmail.com</a>.<br>
Set your list options: <a href="http://lists.toku.us/options.cgi/lctg-toku.us/joeoptics@gmail.com" rel="noreferrer" target="_blank">http://lists.toku.us/options.cgi/lctg-toku.us/joeoptics@gmail.com</a><br>
</blockquote></div>
===============================================<br>
::The Lexington Computer and Technology Group Mailing List::<br>
Reply goes to sender only; Reply All to send to list.<br>
Send to the list: <a href="mailto:LCTG@lists.toku.us" target="_blank">LCTG@lists.toku.us</a> Message archives: <a href="http://lists.toku.us/pipermail/lctg-toku.us/" rel="noreferrer" target="_blank">http://lists.toku.us/pipermail/lctg-toku.us/</a><br>
To subscribe: email <a href="mailto:lctg-subscribe@toku.us" target="_blank">lctg-subscribe@toku.us</a> To unsubscribe: email <a href="mailto:lctg-unsubscribe@toku.us" target="_blank">lctg-unsubscribe@toku.us</a><br>
Future and Past meeting information: <a href="http://LCTG.toku.us" rel="noreferrer" target="_blank">http://LCTG.toku.us</a><br>
List information: <a href="http://lists.toku.us/listinfo.cgi/lctg-toku.us" rel="noreferrer" target="_blank">http://lists.toku.us/listinfo.cgi/lctg-toku.us</a><br>
This message was sent to <a href="mailto:tedpkphd@gmail.com" target="_blank">tedpkphd@gmail.com</a>.<br>
Set your list options: <a href="http://lists.toku.us/options.cgi/lctg-toku.us/tedpkphd@gmail.com" rel="noreferrer" target="_blank">http://lists.toku.us/options.cgi/lctg-toku.us/tedpkphd@gmail.com</a><br>
</blockquote></div>