From: <cappellen_at_email.protected>
Date: Tue, 07 Jun 2011 13:25:16 +0200

Dear colleagues,

With regard to the CoDR documentation:

As I stressed in the April 27 and May 4 telecons, at the CoDR we have
to assess the impact of one or more PAF scenarios on the SKA1 system.
These scenarios can be realistic, pessimistic or optimistic, but they
should defined. We seemed to agree on this in the telecons. However, the
current version of the CoDR documentation only contains subsystem
descriptions. It would be unacceptable if the documentation would not
contain at least a set of science requirements, a system architectural
design and a cost estimation for one or more scenarios. The impact on
the overall system should be considered since PAFs will also impact the
digital beamforming, data transport, correlation and postprocessing.

Furthermore, the current version of the documentation contains
"technical progress" of the various subsystems, but the system level
"technical progress" is not included. There have been several
measurement campaigns of PAFs on telescopes, at least at BYU, DRAO and
ASTRON, and I consider their results are highly relevant for the overall
PAF technical progress. Laurens already submitted a recent APERTIF paper
which includes our experimental results and I will submit the APERTIF
PDR documentation.

Best regards,

Wim.

-- 
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Wim van Cappellen
Head of Antenna Group, APERTIF Project Manager
ASTRON - R&D
P.O.Box 2, 7990 AA Dwingeloo, The Netherlands
Phone: +31 (0)521 595 253, fax +31 (0)521 595 101
E-mail: cappellen_at_astron.nl  internet: www.astron.nl
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Received on 2011-06-07 21:26:19