Yes, it is the position of the antenna. Once the signals enter the
downlead, their relative positions in time are fixed. It is the relative
positions in time that are used to determine position.
John WA4WDL
--------------------------------------------------
From: "Peter Krengel" <krengelda...@gmx.de>
Sent: Tuesday, September 07, 2010 1:57 AM
To: <time-nuts@febo.com>
Subject: [time-nuts] What position is measured?
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?
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)...
What do you think?
Peter, DG4EK
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