[time-nuts] What position is measured?
jimlux
jimlux at earthlink.net
Tue Sep 7 13:30:22 UTC 2010
Peter Krengel wrote:
> Hi nuts,
>
> have got some interesting question from friends.
> They asked
>
> What coordinates are measured and registrated by a GPS.
> Is it the position of the antenna, it could be 100m (300ft) away from me
> or is it the position of the GPS RX as this is the position of the µC where
> signals are processed?
Where the antenna is..
>
> I answered, its allways the antenna position as there is the point where
> wave fronts coming in from the sats becomes electrical signals (note we are
> not talking about PPS but coordinates)...
Pretty good..
Another analogy is that if you had a machine that recorded all the
signals, mounted right at the antenna, and then carried the recording
half way around the world, and then ran the recording into a receiver,
it would give you the position of the antenna, not the receiver. The
cable is just a time delay.
>
> What do you think?
>
> Peter, DG4EK
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>
More information about the time-nuts
mailing list