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WAAS is a system which enhances GPS, in that it finds the deviation in
the GPS signal, and broadcasts that deviation from a set of
satellites.

GPS w/ WAAS supposedly has a 6 ft accuracy horizontally, and a 10 ft
accuracy vertically. With WAAS, the FAA will supposedly certify
non-precision approaches using the GPS for altitude input.

Honestly, WAAS was a bigger deal when Selective Availability was in
place. WAAS is just a mechanism to guarantee that the GPS signal is
good enough to get approach capability.


Rob Luce | http://home.att.net/~rdluce/plane.html
PP-ASEL, IR wannabe |
172G N3747L @ C52 |



On Sat, 26 Aug 2000 08:00:05 -0400, John wrote:

>
>
>I hav heard the term WAAS before, but I do not know exactly what this
>system is and what use a VFR pilot could make of it.
>
>I would appreciate it if someone could provide a simple explanation of
>WAAS and how this might effect a pilots navigation. Does this simply
>provide additional accuracy for GPS navigation, or possibility for more
>GPS IFR approaches?
>
>I realize now I dont have even a basic knowledge of WAAS and what it
>does for the pilot community.
>
>Thanks
>
>John
>

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