Barometric altimeter on 'future' Freerunner ?

[Ortwin Regel]

I can see exotic applications for this but certainly not enough to put
it into the phone. If you need it, add it via USB host, that's what
we've got it for. (Same is true for the railgun. ;) )

Ortwin

On 5/18/08, Stroller <linux.luser at myrealbox.com> wrote:
>
> On 17 May 2008, at 22:17, Philippe Guillebert wrote:
>> Matthias Schulze wrote:
>>> I am wondering about applications possible with the Freerunner
>>> (connected via usb) or later phone models, if a barometric altimeter
>>> would be included.
>>>
>> Hi,
>>
>> Err, doesn't GPS give us a pretty accurate altitude already ?
>
> lol.
>
> No.
>
>> Event if the precision is something like +/- 20 meters, I believe
>> it's got a better accuracy than a barometric altimeter that you've
>> got to calibrate to the meteorological conditions all the time.
>
> GPS altitude precision is more like +/- 200 metres. Even cheap
> electronic altimeters are accurate to a few feet. That they need
> daily calibration makes them only of use to people who actually
> _need_ to know their height - an altimeter built into a digital
> watch, for instance, is usually no more than a gimmick, but a hang-
> glider pilot can simply hold down the "zero" button on his £100
> altimeter for 3 seconds and then knows his height accurately for the
> duration of the day's flying.
>
> Stroller.
>
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