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Re: URGENT: geane - coordinate system [message #5106 is a reply to message #5097] Thu, 27 September 2007 18:00 Go to previous messageGo to previous message
Andrea Fontana is currently offline  Andrea Fontana
Messages: 32
Registered: May 2007
continuous participant
From: *pv.infn.it
Hello,
there is no coordinate transformation: geane tracks in MARS.
The only transformations are in the definition of the track
parameters and in their errors calculation: these can be done
in SC or SD and can be transformed in MARS after the tracking.
At this point MARS for geane is identical to MARS for Panda.

In the first tutorial we shot along x axis, but it was
only to keep things simple: in the second tutorial we shot
isotropically in the Panda (MARS) system, so there is nothing
special about x axis. In SC angles are already defined in
MARS as azimuthal and polar angles. If the track is in SD
you have to calculate them by transforming to SC.

We hope this is clear now.

Ciao,
Andrea and Lia

 
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