Joerg Reisenweber joerg at
Fri Jun 6 06:46:17 CEST 2008

Am Fr  6. Juni 2008 schrieb Flyin_bbb8:
> just wanted to add, Differential GPS is mainly for aircraft GPS systems to
> get better guidance on the ILS (Instrument Landing System).

Aaaaha, I seen it being used for all sorts of archeology and buildings 
construction purposes.
And from the info in the uBlox-paper, regarding the protocol options it 
doesn't seem to me like there is much chance for better precision by the way 
they do A-GPS.
Better precision would mean info on meteorological interference (like exact 
amount clouds on the way to sat) at the very location of the receiver. To get 
this, you need... a reference receiver, so we are at D-GPS again.

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