piclist 2007\03\26\103126a >
Thread: Swiss pilot achieves his flight of fancy
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face picon face BY : Alan B. Pearce email (remove spam text)



>For these accuracies you need a receiver that can receive both
>the L1 frequency (Civil) and L2 (Military) to cancel out some
>of the ionospheric time delay effects as well as a stationary
>reference receiver within roughly a 100 km radius.

That is what I was figuring the survey equipment does.

>Receiver designers are getting quite smart with their algorithms.
>While the receiver is not able to fully decode the L2 signal it is
>able to obtain enough information from it to be useful.  No special
>licence is required, only a significant amount of cash.  High
>quality receiver/antenna systems would set you back $20 - 30 K a
>few years ago when I looked.

which would be the sort of starting figure I imagine the surveyors gear
costs.

<000901c76fb3$5d236ba0$1979f682@space.rl.ac.uk> 7bit

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Subject (change) Swiss pilot achieves his flight of fancy

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