Will wrote:
Possibly that data could be
colored or made to blink in situations where integrity is compromised
sufficiently.


It does.. as previously stated... you get a RAIM warning.

All you need to know is "is the signal performing to a legal/safe
standard" or not. "Good enough for the FAA" is what counts when you are
considering the purpose of a GPS guided instrument approach.

Adding the percentage parameters you envision is just the sort of thing
to add workload to a single pilot IFR approach to minimums. One more
thing to monitor..

Instead, I think the Feds got it right.. either its GOOD or its BAD.
Period.

Dave