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</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hi All<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I’m just about to have a go at building an Arduino data logger & GPS unit, the one from Adafruit. <a href="http://learn.adafruit.com/adafruit-ultimate-gps-logger-shield/overview">http://learn.adafruit.com/adafruit-ultimate-gps-logger-shield/overview</a> with an external aerial.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>The post processing software will be RTKLIB, and living in Europe I assume I’ll be using EGNOS. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>The intended use is to help with the surveying at archaeological sites our society works at. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I know there are plenty of commercial units but not at the process us hobbyists can afford. We’re quite comfortable that the accuracy will be not as good as a commercial unit, but as long as it is good enough, and no worse than our manual surveys, that’s fine.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>We will also be carrying out a back to back evaluation with a commercial unit at some point to confirm our findings. [The “we” is the Derbyshire Archaeological Society, who have been kind enough to support this project with a grant].<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>There is a blog, <a href="http://www.vilis.org.uk">www.vilis.org.uk</a>, but that is brand new as well and I need to write a lot more content to fit in with the open source ethos.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>If there are any comments/advice/hints or experience you’d like to pass on, please feel free.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Tony<o:p></o:p></p></div>
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