Steve,
Why not use a magnetic compass and correct for magnetic declination? The
magnetic declination for the location of your sundial can be found here:
http://www.magnetic-declination.com/ .
Don S
On 9/11/2018 2:38 PM, Steve Lelievre wrote:
Hi everyone,
How good is a cell phone
Hi Steve,
My experience with the cell phone compass in a Moto G Android is poor. As Dan
noted it can be off by 15 to 20 degrees. The apps are good showing both
magnetic and compass direction and strength. But the magnetic sensors in the
chip are poor even with the calibration rotations done.
On 2018-09-11 12:49 PM, Richard Langley wrote:
There must be some specs somewhere on the Web.
Unfortunately, the only spec I've found just says the phone has an
electronic compass - no accuracy stated.
Chat on discussion lists seems to a bit scathing but most relates to
older phones.
I would try to use a theodolite. If you center it on the first point and
know the azimuth to a distant reference, I guess you can determine where
the second post needs to be.
Dan Uza
On Tue, Sep 11, 2018 at 10:48 PM Dan-George Uza
wrote:
> In my experience, cellphone compasses are completely
And if you were still at UNB, we could have used a theodolite to line things up
similar to what I had to do (or, rather, have a student do) when helping to
refurbish the Fredericton Soldiers Barracks wall sundial a number of years ago.
;-)
-- Richard
Hi Steve:
My iPhone compass app is indicating N correctly to within 1° right now with the
phone sitting on the dining room table in a wood-frame house. Calibration not
performed recently. Fortuitous? There must be some specs somewhere on the Web.
-- Richard
In my experience, cellphone compasses are completely unreliable for
dialling. Some are off by more than 20 degrees. You can quickly check the
accuracy on Google Maps: the narrower the blue cone is, the more accurate
results will be.
Dan Uza
On Tue, Sep 11, 2018 at 10:39 PM Steve Lelievre <
Hi everyone,
How good is a cell phone compass? I mean, if I have no metal nearby and
I have the phone set to show True North, what kind of accuracy can I
expect if I lay my phone flat and use the compass app?
I'm working on a vertical west sundial for a community garden (a.k.a
allotment)
Diese Nachricht wurde eingewickelt um DMARC-kompatibel zu sein. Die
eigentliche Nachricht steht dadurch in einem Anhang.
This message was wrapped to be DMARC compliant. The actual message
text is therefore in an attachment.--- Begin Message ---
Daniel
Thank you for this explanation. What was
Daniel,
I think that now would be an appropriate time to thank you for the Sundial
Mailing List, and for the wide-ranging resources page that you also keep online.
I don't know how long you have maintained the SML, but I know that I have been
a member of it since the 1990s, and it has been a
Daniel,
I think you are right. I did a quick check and
see that a "DMARC message" is sent from a
different email address then what is on the list.
A check by the persons concerned would be helpfull for all subscribers.
Thibaud
At 11:45 11-9-2018, Daniel Roth wrote:
Dear All,
As the list
Dear All,
As the list administrator I'm writing to you that the DMARC topic is annoying a
lot of mailing list users. Some explanations are given here:
https://wiki.list.org/DEV/DMARC
This sundial mailing list is currently hosted by a Mailman version 2.1.29
installation (I have no influence on
Dear Kevin,
Thanks a lot for putting together this very nice site !
You will also have to write the book. The EOT is such a fundamental ‘cultural
and social’ topic that it deserves a proper discussion.
In the chapter THE EQUATION OF TIME IN ASTRONOMY & NAVIGATION
it could be very nice to add
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