Newton vs DFPM

rruff
Posts: 445
Joined: Wed Apr 23, 2008 10:48 am

Re: Re:Newton vs DFPM

Post by rruff »

iBike uses the barometric altimeter to adjust the tilt. It uses the previous 5 min of data to do this... it checks what the elevation change should be based on the distance and tilt info, and compares this to the altimeter... then adjusts the tilt to match the altimeter. So on any long climb or descent, the slope will be off if the barometric data is off. If you go up and down in less than a 5min time frame you wouldn't be affected though.
jazclrint
Posts: 153
Joined: Thu Feb 25, 2010 8:05 pm

Re: Newton vs DFPM

Post by jazclrint »

The iBike does not use the barometric altimeter for slope. If it did you couldn't get a slope reading by moving it around while holding it in your hand.

rruff, your whole argument about the iBike's inaccuracy due to barometric pressure has no basis in fact.
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rruff
Posts: 445
Joined: Wed Apr 23, 2008 10:48 am

Re: Newton vs DFPM

Post by rruff »

It might be good to spend a little time investigating the matter before you shoot your mouth off.

It doesn't *use* the barometric reading to determine slope, and I never said it did. It uses the barometric reading to *adjust* the tilt, using data from the last 5 minutes.
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