LeadSled
WAAS equivalent in Australia would have made the emergency proceedure adopted by the crews of descending well below published minima much safer.
Thus WAAS in Australia should be om the agenda, given the reduced cost needed now that Japan has done the hard work for our area.
The future promise of improved accuracy GPS without WAAS/SBAS is obviously not convincing, or else why would so many countries be bulding WAAS/SBAS type systems?
See
GNSS augmentation - Wikipedia, the free encyclopedia
File:SBAS Service Areas.png - Wikipedia, the free encyclopedia