Mxsmanic wrote:
writes:

SA turned off, differential GPS, WAAS, and LAAS.

Differential GPS, WAAS, and LAAS are not part of the GPS system.

WAAS most certainly is part of the GPS system, LAAS is in development, and
differential is a matter of interpretation.

You won't see any improvement from WAAS because France isn't in the
current service area.

If you don't like those examples of GPS system improvements,
here are some of the following since 1978:

Six distinct satellite families, each progressively better, 1978-2009.

SA turned off circa 2000.

L2C added to Block IIR-M and newer satellites circa 2005.

Total of 31 satellites and the constellation changed to a nonuniform
arrangement circa 2008.

The CNAV message added to upgrade the original NAV message.

The L5 and the L1C messages in work.

Further improvements, called GPS III, are planned to be all operational
by 2013, with incentives offered to the contractors if they can
complete it by 2011.

In summary, you don't know **** from shinola about how GPS works or the
history of GPS.


--
Jim Pennino

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