Susan:
Are the catenaries enrgized? In any event you can expect some signal
degradation and perhaps complete cancellation as the locomotive moves
becuase the catenaries will screen the GPS signals. As you may be aware,
GPS relies on a minimum of two "visible" satellite signals and sometimes is
able to see six or more which makes accuracy more achievable.
Any metallic medium interspersed between the GPS antenna and the direct
satellite signal will cause a certain attenuation to the signal.
Can you provide more specifics?
Ralph Cameron
EMC Consultant for Suppression of Consumer Electronics
(After Sale)
----- Original Message -----
From: "Beard, Susan" <sbe...@ge-harris.com>
To: <emc-p...@ieee.org>
Sent: Tuesday, May 23, 2000 3:56 PM
Subject: interference to Comm devices due to overhead catenaries
>
> Could anyone provide any information relative to overhead catenary noise
and
> its affects on locomotive roof top comm systems (e.g., GPS)?
>
> Susan Beard
>
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