Comments on: APRS Position Error http://softsolder.com/2012/10/24/aprs-position-error/ Ed Nisley's Blog: shop notes, electronics, firmware, machinery, and curiosities Sat, 18 May 2013 12:05:27 +0000 hourly 1 http://wordpress.com/ By: Ed http://softsolder.com/2012/10/24/aprs-position-error/#comment-14229 Wed, 24 Oct 2012 23:29:28 +0000 http://softsolder.com/?p=11620#comment-14229

jumps like that due to aberrations caused by reflection of GPS signals

We were riding under trees at the time and I’m always astonished at how well GPS receivers work under those conditions. I just spotted a similar glitch that occurred while I was riding around a traffic circle 40 meters from the nearest buildings with a good sky view, but I’ve heard enough VHF multipath interference to know anything’s possible.

Once is happenstance, twice is coincidence, three times… well, it might be the start of something interesting.

Thanks for the info!

]]> By: David http://softsolder.com/2012/10/24/aprs-position-error/#comment-14226 Wed, 24 Oct 2012 21:48:14 +0000 http://softsolder.com/?p=11620#comment-14226 Ed, If your GPS doesn’t have a Kalman filter inbuilt in its software, it is not uncommon to see jumps like that due to aberrations caused by reflection of GPS signals. Even dense foliage overhead can cause aberrations.

]]>