Same with my [old] iPhone 5se. The app Commander Compass is
outstanding on the IOS platform ... allows the user to select
magnetic or true north and allows overlaying the compass on
the users' choice of maps including maps from Google, Apple
and USGS Topo maps (among others).
73,
... Joe, W4TV
On 1/23/2017 1:14 PM, Barry Merrill wrote:
My iPhone 7 does NOT need motion for the Compass App.
The app immediately rotates to the heading of the phone,
while the phone was flat on the desk.
Barry, W5GN
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of
Michael Clarson
Sent: Monday, January 23, 2017 10:33 AM
To: K1TTT <k1ttt@arrl.net>
Cc: TowerTalk@contesting.com
Subject: Re: [TowerTalk] Strange behavior
David's method of using a topo map and sighting an object is the best way.
A GPS requires it to move in order to get a bearing, and magnetic compasses
have issues. Besides the difference between magnetic and true north, they
are often affected by local conditions. I have encountered errors up to 40
degrees in the mountains between Bethlehem and Harrisburg PA, probably due
to all the iron ore in the ground. --Mike, WV2ZOW
On Mon, Jan 23, 2017 at 7:23 AM, David Robbins <k1ttt@verizon.net> wrote:
Compasses in smartphones are like the ones in your car, a magnetic sensor.
So they are affected the same way as any other magnetic compass.
A gps can only tell you what direction you are moving and can take
quite a while to give a good bearing especially in cluttered
environments around buildings or even heavily wooded areas. The best
way to get a bearing with a gps is to mark a waypoint at the tower,
preferably by averaging the location for a minute or two if your gps
supports that, then going at least
100 yards away in the general direction you want to check... when you
get a good distance away check the bearing back to the original
waypoint which is of course the reciprocal of where the antenna is
pointing.
My preferred method is to find an obvious feature on a map that you
can see from the tower and get the bearing to it from a good map then
use that to line up rotors.
David Robbins K1TTT
e-mail: mailto:k1ttt@arrl.net
web: http://wiki.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://k1ttt.net:7373
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of
Roger
(K8RI) on TT
Sent: Monday, January 23, 2017 03:16
To: towertalk@contesting.com
Subject: Re: [TowerTalk] Strange behavior
If I'm not mistaken the smart phones derive the compass from GPS which
is true, not magnetic so it wouldn't require a correction.
73, Roger (K8RI)
On 1/22/2017 8:43 PM, Jim Brown wrote:
Thanks Dick. It's also important to realize that accuracy will
depend on the sensors in the phone it's running on, as well as
surrounding stuff as others have noted.
I bought an unlocked Motorola Moto X Pure phone last fall that I
like it lot. I have two compass programs on it that SEEM to work
well. GPS Status and Compass 360. Both automatically correct for
declination. I haven't done a serious test of either of them. The
one you recommend also looks good.
73, Jim K9YC
On Sun,1/22/2017 5:21 PM, Richard Solomon wrote:
OK, I'll be a bit more specific.
There's an App called GPS Essentials.
No Owls, no bugs, has a very accurate compass.
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
--
73
Roger (K8RI)
---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|