[OSM-talk] fwd: Two thirds of mobile users want driving ANDwalking navigation
grahamjones139 at googlemail.com
Tue Feb 16 18:29:10 GMT 2010
You are both right. RF absorption is a combination of amount of material
and its properties. I think the issue with trains is limited to newer ones
with special windows (I think they are conductive - some cars have them
too). The combination of shielding from the roof and windows makes it
practically impossible to get a fix. I was surprised that I managed to get
a fix in a jet aircraft a few months ago - I would have expected this to be
a good shield too.
On Feb 16, 2010 5:51 PM, "Dave F." <davefox at madasafish.com> wrote:
John Smith wrote: > On 17 February 2010 01:40, John F. Eldredge <
john at jfeldredge.com> wrote: > >>...
Is this correct?
I assumed the reason I had trouble getting reception on board trains
because of what their roofs were screened with.
I can't believe they'd put much mass up there.
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