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" <[email protected]> To: <[email protected]> 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 > > ------------------------------------------- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > To cancel your subscription, send mail to: > [email protected] > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Jim Bacher: [email protected] > Michael Garretson: [email protected] > > For policy questions, send mail to: > Richard Nute: [email protected] > > > ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: [email protected] Michael Garretson: [email protected] For policy questions, send mail to: Richard Nute: [email protected]
