Re: GPS was used as part of the STS-121 landing this morning

Dan Foster wrote:
In article <UPOug.83839$1i1.1874@attbi_s72>, Sam Wormley <swormley1@xxxxxxxxx> wrote:

GPS was used (for the first time) as part of the STS-121 landing this morning

Press conference in progress
http://www.nasa.gov/ram/35037main_portal.ram


Addendum:

The main problem with GPS, for years, was that it did not provide a
sufficiently accurate vertical (elevation) resolution for landing. No
problem with horizontal resolution.

I don't recall how they addressed the vertical component.

LAAS or some custom correction scheme, perhaps?

-Dan

STS-121-Discovery likely has access to the P(Y) code signals.
.

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