There are problems with telephone data plans at high altitudes. The
radiation patterns for wireless phones (from repeaters) are pancake shaped,
with little power directed in the vertical direction. Same problem with
phones on commercial flights. The object of course for normal phones is to
get the best coverage at ground level. While I don't have experience or
direct knowledge, I have read that it is be a problem at altitude. Of course
there is always some signal in any direction, it just may not be reliable or
useful.
Garry
On Fri, Oct 7, 2011 at 4:10 PM, Ben Ransom <bransom@ucdavis.edu> wrote:
Anyone know if there is any truth to a report I had read (9 months back)
that some of the ipad gps flight aids do not work above 10k msl?
-Ben
On 10/7/11 8:52 AM, "Bob Patterson" <bobp@prosumers.ca> wrote:
Somebody was going to do this !
http://www.androidflightdirector.com/
Looks like a cheap Chinese 10" Android tablet computer
with moving map GPS, for $699.99 .....
$49/year map subscription... if you want it ...
Cheaper than buying maps, plus some utility ...
Hardware quality might not be great, but price is right !
Maybe next just the software will be available for any computer ...
it's not that hard to do ! Actually, there's free open source GPS
software available NOW for Linux - just scan your own maps, or d/l the
existing road maps ... Used it several years ago to get to Sun 'n Fun !
(also good for the car .... ;-) )
We used GPSDrive, and a cheap USB GPS antenna that came with
an outdated package of M$ Streets & Roads bought locally ...
(- $29 !! -- tossed the M$ software .. kept the antenna ! )
There's also Roadnav, Navit, and Viking ...
some of these can use Garmin maps, others use Google Maps,
and all can use OpenStreetMaps .... ALL free software !!!
Ain't Linux grand !! ;-) (Android IS Linux ...)
......bobp
bobp@prosumers.ca
bobp@pattersys.com
http://www.Pattersys.com
http://www.amway.ca/BobPatterson
De-fenestrate now ! Linux is the answer !
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