-----Original Message-----
From: ]
Posted At: Sunday, February 12, 2006 5:53 AM
Posted To: rec.aviation.ifr
Conversation: GNS430 on the Airway
Subject: GNS430 on the Airway

ted wrote:
wrote in message
news:%_hHf.33984$JT.6861@fed1read06...
....clipped for brevity...
[Jim Carter]
Continuity means the reliability of the primary GPS sats themselves.
They can have a sat failure or, more likely, jamming.

[Jim Carter]
Unless control of the satellite management system can be achieved, and
the entire constellation interrupted, wouldn't jamming be a localized
event based on the radiation pattern and power of the jamming
transmitter? And to continue jamming wouldn't the transmitter have to
stay active, making it a pretty easy target for any of several modern
weapons systems that don't rely on GPS for navigation?