[time-nuts] Knowing when the PPS signal is locked to the satellite.

[Dave]

I am using a NEO-6M to provide a PPS signal for an experiment but I need 
to know when it is locked or not.

Does anyone know if there is a way to find out from either the NMEA data 
stream or via the proprietary protocol ??

At the moment I have it programmed to only provide a PPS signal when it 
is locked (or nothing if not) and monitor
the PPS signal in the microprocessor, but it's not entirely satisfactory 
and I need a better mechanism.

Dave