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[aprssig] GBAS

Andrew Rich vk4tec at people.net.au
Sun Feb 10 10:04:25 UTC 2008


Some may be interested to know that in Australia, we are about to implement
GBAS.

So what is GBAS ?

Funny name.

GBAS is a set of 4 GPS receivers on the ground, which are in highly accurate
surveyed positions.

The GPS error is uplinked to aircraft in the area.

I suppose it is DGPS, but with 4 ground receivers instead of 1.

The idea being as you fly into an area that supprts GBAS, your position
accuracy suddenly shoots up.



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Andrew Rich VK4TEC
vk4tec at people.net.au
http://www.tech-software.net


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