In article , David B wrote:

"Niklas Karlsson" wrote in message
...

I tried to do this on the Met line the other day, but couldn't seem to
get sufficiently good GPS reception (yes, this was in the surface
sections).

I've also tried doing the same on the SWT Reading line, which seems to
work well on the Junipers, but not very well at all on the 455s and
421s/423s, for some reason.

Perhaps there are GPS receivers with better sensitivity than my basic
eTrex, though?

You have my sympathies. My GPS is a Garmin and an old one and can have a lot
of trouble locking on (tracking) satellites. Maybe the more expensive makes
are better and can achieve a 'lock' a lot faster. Try moving about the train
(both sides) and if possible get a 'lock' before boarding the train so the
GPS gets a headstart once the train is moving.

I tried moving around the train and made sure I had a line of sight to
the sky. I didn't have a lock when I got aboard, though, as I got on at
a sub-surface station... maybe I should try getting on at a surface one
instead.

I can generally get good reception on buses too (single-deckers, at least -
haven't tried it on DDs yet).

Niklas
--
I mean, who could fail to enjoy doing Bristol - London along a
congested M4 in a 60mph steamroller?
-- Michael Hudson