Re: Curious about the barometer in iPhone 6?

Jan Kleinhans Mon, 06 Oct 2014 23:08:05 -0700

Hi

Thanks for that. Yes, it's easy enough to get local barometric readings,it's just me liking the idea of having my own devices measuring, like thenetatmo station. I don't own one of those yet, but it is a dream that Iwant to make true, as I enjoy keeping weather data of my own, not officialdata from a airport or weather service. Thanks all the same for the info.


Regards

Jan

----- Original Message -----From: "Sieghard Weitzel" <siegh...@live.ca>

To: <viphone@googlegroups.com>
Sent: Tuesday, October 07, 2014 7:48 AM
Subject: RE: Curious about the barometer in iPhone 6?

Hi Jan,

I don't think it does, the barometric measurement is probably strictly used
for elevation. However, any good weather app should give you barometric
pressure and as long as you don;'t live a long way above or below wherever
the nearest sensors are located it should be pretty accurate. Alternatively,
the Netatmo Weather Station will give you barometric pressure. If you search
for "Netatmo" in the archives you can find a number of posts about it.

Regards,
Sieghard

-----Original Message-----
From: viphone@googlegroups.com [mailto:viphone@googlegroups.com] On Behalf
Of Jan Kleinhans
Sent: Monday, October 06, 2014 8:46 PM
To: viphone@googlegroups.com
Subject: Re: Curious about the barometer in iPhone 6?

Hi

Thank you for a well explained function, makes perfect sense to me.  Now, do
you know the rest of the answer, does the barometer indeed give air pressure
on the iPhone 6 in inches or milibars, and, can voice over tell us what the
readings are?  I just enjoy all the weather related things, and this
function on a phone would have me very happy indeed.

Regards

Jan

----- Original Message -----
From: "Sieghard Weitzel" <siegh...@live.ca>
To: <viphone@googlegroups.com>
Sent: Monday, October 06, 2014 7:34 PM
Subject: RE: Curious about the barometer in iPhone 6?

Hi Rob and Jan,

Altimeters both stand-alone units sold in climbing and outdoor stores as
well as those integrated in all of the better Garmin GPS units all use a
barometric sensor to give precise elevation readings. Any GPS as well as the
iPhone can give you elevation based on GPS information, but while this is
better now than it was years ago, it is still less accurate than elevation
information based on barometric pressure because of GPS signal time delays
and simply the problem with acquiring enough satellites for an accurate
calculation.

. Typically all one has to do with a barometric altimeter is set the
elevation at a known location, e.g. any airport would do because you can
simply ask the airport authorities or google what the elevation of any
particular airport is. Once set a barometric altimeter will give you
accurate readings as you go up or down in elevation based on air pressure.
This is the same principal as in scuba diving where you get very accurate
depth readings from your depth gauge based on water pressure, pressure at
sea level is 1 bar or approx. 14.5 pounds per square inch and this increases
by 1 bar or 14.5 pounds per square inch for every 33 feet you go down and
the depth gauge messures this pressure and gives your depth in return. A
relatively deep recreational dive of 110 feet means you are exposed to 4 Bar
or approx. 58 pounds per square inch of pressure. If you take an empty 2
Liter pop bottle down there with the cap screwed on tight it will be
squished flat.

You will have to recalibrate a barometric altimeter if there are significant
changes in air pressure due to weather conditions, e.g. a storm causes an
intense low pressure system.

If you want to learn more about this all you have to do is Google something
like "How does a barometric altimeter work" or "How ddo weather conditions
effect barometric altimeters" or "How to calibrate a barometric altimeter".

Regards,
Sieghard

-----Original Message-----
From: viphone@googlegroups.com [mailto:viphone@googlegroups.com] On Behalf
Of Jan Kleinhans
Sent: Monday, October 06, 2014 12:13 AM
To: viphone@googlegroups.com
Subject: Re: Curious about the barometer in iPhone 6?

Hi

Thanks for this.  It is interesting indeed.  I read the altitude thing in a
review of the iPhone 6 on the gsm arena website, and also did not quite get
it how that would help, so that's why I was wondering if the barometer was
usable for it real function via voice over?

Thanks all the same.

Jan

----- Original Message -----From: "RobH." <bobs...@googlemail.com>

To: <viphone@googlegroups.com>
Sent: Monday, October 06, 2014 9:00 AM
Subject: Re: Curious about the barometer in iPhone 6?

This is interesting, though don't see how it would help with
height/altitude.

Given the variability of air pressure relative to weather conditions, it
would hardly be accurate.  Even planes used to have to zero their altimeter
relative to prevailing conditions before they get a good or accurate fix.
Modern ones probably do better now.  And after all that, Siri can work that
out with GPS, too.

RobH. Disappointed, Siri gave me a lecture on what altitude was,  and didn't
tell me my position at all. Yet I have been, when using 6.1.4 or whatever
that was.

----- Original Message -----From: "Jan Kleinhans" <jhkleinh...@telkomsa.net>

To: <viphone@googlegroups.com>
Sent: Monday, October 06, 2014 4:32 AM
Subject: Curious about the barometer in iPhone 6?

Hi

Has anybody that owns a iPhone 6 or 6+ looked at the barometer function of
the phone?  I am curious as to whether it can be used by users using voice
over?  I read somewhere that it is used mainly for elevation, but I am
interested in the weather functions of the barometer, meaning can one get a
reading in inches or milibars like a normal barometer used in weather
stations?

Regards

Jan Kleinhans

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