Coordinate system for hit parameters [message #13130] |
Fri, 02 March 2012 20:26 ![Go to next message Go to next message](/theme/gsi/images/down.png) |
Volker Friese
Messages: 365 Registered: April 2004 Location: GSI CBM
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first-grade participant |
From: *dip.t-dialin.net
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On 02.03.2012 at 15:03 wrote Andrey Lebedev:
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Dear Colleagues,
we have recently some discussions about which coordinate system to use to store hit information.
With this mail I want to start a further discussion on this topic.
Currently, hit position and corresponding errors are stored in global coordinate system (in a plane which is perpendicular to beam direction). However, introducing rotated outer planes in TRD we have to define how to store hit information, namely, in which coordinate system.
In order to be consistent with current definitions, I would say that we have to stick to global coordinate system. This would be also easier for tracking to have all hits in the same coordinate system. However, hit producers has to be modified and implement rotation of the hit coordinates and errors.
Best regards,
Andrey
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Re: Coordinate system for hit parameters [message #13147 is a reply to message #13146] |
Mon, 05 March 2012 14:04 ![Go to previous message Go to previous message](/theme/gsi/images/up.png) |
Alexandr Zinchenko
Messages: 22 Registered: May 2009
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occasional visitor |
From: *jinr.ru
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I can't imagine what would be the global coordinates for
a rotated straw tube hit (let say, at 45 degs with respect to
the vertical direction) and their errors - in fact, we discussed
this issue quite some time ago. In any case, it would be useful
to talk to STS tracking people.
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