Richard Bennett wrote:
------- Forwarded message -------
From: "Richard Bennett" <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Cc:
Subject: Re: Neo1973 Update!
Date: Mon, 04 Jun 2007 14:10:46 +0200
On Mon, 04 Jun 2007 11:31:50 +0200, <[EMAIL PROTECTED]>
wrote:
the GPS daemon would need to be updated to allow for kallman filtering
using those accelerometers, so that the GPS apps could continue pointing
the phones location inside tunnels and stuff
Unfortunately not. As already pointed out on that list, the
accelerometers error would add up itself.
Besides: Its only two accelerometers. You can do 2-dimensional
'navigating' with that, no more. No tilting/rotating.
In the talk posted to google video they say they have 2 x 3D
accelerometers to allow detecting rotation as well.
With perfect accelerometers, yes.
With real ones, buildable into the phone, no.
The signal you get for roll about the gravity axis is tiny, and quite noisy.
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