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Show your work.
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Originally Posted by prj71
(Post 22094769)
Show your work.
In this thread:
Originally Posted by prj71
(Post 22075191)
Weird that people get so engrossed on how accurate it is.
Originally Posted by prj71
(Post 22076445)
Who T F cares about the Nyquist rate fercripesakes. Just go ride your bikes and have fun.
Originally Posted by prj71
(Post 22077067)
You guys are still arguing about this? Really?!
Originally Posted by prj71
(Post 22092885)
My god...I disappear for a week and you guys are still babbling about GPS accuracy.
Originally Posted by prj71
(Post 22094747)
I haven't whined once in this thread.
It was "once" today in this thread. Across the entire thread, it was 7 or 8 times! |
Originally Posted by terrymorse
(Post 22074361)
There's an article in Bicycling that has some information why there are GPS errors, and what you can do to avoid them:
How Your GPS Lies to You |
Originally Posted by njkayaker
(Post 22094789)
:rolleyes:
In this thread: And other posts indirectly winging about it. You posted this nonsense a mere 3 hours after whining about it! It was "once" today in this thread. Across the entire thread, it was 7 or 8 times! Apparently you don't know the definition of whining. |
Originally Posted by prj71
(Post 22096081)
Apparently you don't know the definition of whining.
https://www.dictionary.com/browse/whiny complaining; fretful; cranky:The baby is whiny because he missed his nap. |
Originally Posted by prj71
(Post 22096081)
Apparently you don't know the definition of whining.
https://www.dictionary.com/browse/whiny complaining; fretful; cranky:The baby is whiny because he missed his nap. |
Originally Posted by rsbob
(Post 22092574)
My GPS on a downhill today gave me a top speed of 58.2 MPH where it was more likely around 45. ‘Technology is a wonderous thing.... when it works.
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Originally Posted by RChung
(Post 22096233)
A few weeks ago Jan Heine had a post on his blog about the aero drag of handlebar bags. He was using max speed while coasting down a big hill to determine that. We were curious about that and asked him how he was measuring speed: he was using an iPhone rather than a wheel sensor. If you looked at this max speed, you could tell it was anomalously noisy. We pointed this out and suggested that if he wanted to continue to use max speed (which isn't really that good of a metric, but it was what he was using) he should switch to a wheel sensor. This is about when he decided to cut off comments on his blog posts.
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One person's bug is another person's opportunity.
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like having a higher top speed than in reality?
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Sometimes, yup.
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about halfway down in this thread we did a pretty good discussion of "how GPS works"
How much accuracy do you demand from your bike computer? - Page 2 - Bike Forums worth a read with some technical details of GPS internals. your computer is calculating a waypoint every second and then "stitching" those points together to derive speed and distance the computer does "snap" the position to a road because the raw GPS waypoint has a circular error of about 15 feet best case. so there are a variety of errors that are possible worth a read /markp |
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