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<DIV><SPAN class=897530110-10022008><FONT face=Arial size=2>Some may be
interested to know that in Australia, we are about to implement
GBAS.</FONT></SPAN></DIV>
<DIV><SPAN class=897530110-10022008><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=897530110-10022008><FONT face=Arial size=2>So what is GBAS
?</FONT></SPAN></DIV>
<DIV><SPAN class=897530110-10022008><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=897530110-10022008><FONT face=Arial size=2>Funny
name.</FONT></SPAN></DIV>
<DIV><SPAN class=897530110-10022008><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=897530110-10022008><FONT face=Arial size=2>GBAS is a set of 4
GPS receivers on the ground, which are in highly accurate surveyed
positions.</FONT></SPAN></DIV>
<DIV><SPAN class=897530110-10022008><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=897530110-10022008><FONT face=Arial size=2>The GPS error is
uplinked to aircraft in the area.</FONT></SPAN></DIV>
<DIV><SPAN class=897530110-10022008><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=897530110-10022008><FONT face=Arial size=2>I suppose it is
DGPS, but with 4 ground receivers instead of 1.</FONT></SPAN></DIV>
<DIV><SPAN class=897530110-10022008><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=897530110-10022008><FONT face=Arial size=2>The idea being as
you fly into an area that supprts GBAS, your position accuracy suddenly shoots
up.</FONT></SPAN></DIV>
<DIV><SPAN class=897530110-10022008><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=897530110-10022008></SPAN> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial
size=2>----------------------------------------------------------------------------</FONT></DIV>
<DIV><FONT face=Arial size=2>Andrew Rich VK4TEC</FONT></DIV>
<DIV><FONT face=Arial size=2><A
href="mailto:vk4tec@people.net.au">vk4tec@people.net.au</A></FONT></DIV>
<DIV><FONT face=Arial size=2><A
href="http://www.tech-software.net/">http://www.tech-software.net</A></FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV> </DIV></BODY></HTML>