On 07/16/2012 12:21 AM, Mark Spencer wrote:
Good point about WAAS. I wonder if newer timing receivers that support WAAS would continue to function in a stationary mode if they could only receive valid signals from WAAS ? I also wonder if the WAAS ground segment would continue to function without GPS ? That being said the transmitters are already in orbit.
Considering that WAAS, EGNOS and friends has signal on L1 at approximate the same energy as GPS, when you loose GPS you run high risk at loosing WAAS and friends too, in the same blow.
You should be able to continue receive WAAS signal, even if the GPS fails for them.
The benefit of WAAS and EGNOS is that they have a fixed location in the sky. so you could use a highly directional antenna, like a parabolic antenna, which would provide suppression of most jamming signal unless they are overhead.
Another benefit of using WAAS is that you could do the C/A correlation in analogue hardware, which would allow for CW jammers to be suppressed without the gain control being fetched.
Cheers, Magnus _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
