Frank Ch. Eigler wrote:
Newps writes:


[...] Once the spacing has been established GPS is irrelevant in
maintaining it. The minimum spacing can not be reduced from what it
is now unless aircraft can be designed to be unaffected by wake
turbulence. [...]


Does that not just affect in-trail separation?



Yes, but at the major airports the arrivals start approx 150 nm from the
airport. That's the latest aircraft start to get in trail. At the
busiest times the approach controls will slap a restriction onto the
centers for anywhere from 10-20 miles in trail for aircraft going into
the same airport that will start hundreds of miles from the destination.
Then as they get closer the aircraft streams will be joined together
to their minimum allowed separation.