"Peter" wrote in message
...

"Mike" wrote

Some of the ModeS features will never be implemented and the ModeS
Extended
Squitter will mainly be used by the airlines. For GA, I don't think
you're
going to see much in the way of new ModeS features as the ADS-B UATs will
be
the preferred new technology path for data link.

Isn't the USA going to implement ADS-B using the 1090MHz Extended
Squitter - such as can be done with a GTX330?

The capstone project in Alaska implemented it with UATs and I'm pretty sure
that's the way it's currently being implemented on the east coast working
its way west. As far as extended squitter goes, I know at one time that was
the plan for the airlines because they had already made a large capital
investment in it. I'm not really sure what progress has been made on that
front.


AIUI, most of the rest of the world (those bits that are planning
ADS-B) are looking to do it that way.