[mmaimcal]forwarded message from Stefano Stanghellini

[Stephane Guilloteau]

Al,

    I essentially agree with Stefano, except for one point:

- I am not convinced the measurement of the axis non-intersection during the
assembly will deliver the actual value to be used when observing.

However, I believe this is a non-issue.  Axis non-intersection CAN be
measured with the required accuracy even if the antennas do not go over the
top at all, so we can check later while observing (say at each baseline
measurement).

The key point in Stefano's view is that by specifying the antennas to stay
in the range 0-90 degree,
ALMA can
    - save serious money
    - have better antennas (as going over the top ends up in having more
difficult mechanical settings)

I would thus 100 % support Stefano.

        Stephane





----- Original Message -----
From: "Al Wootten" <awootten at nrao.edu>
To: <mmaimcal at polaris.cv.nrao.edu>
Sent: Wednesday, September 24, 2003 3:48 PM
Subject: [mmaimcal]forwarded message from Stefano Stanghellini


> Hi Bryan and Jeff, and everyone
>
> Stefano has a different take on this--specify the axis non intersection
> to be very small and don't go over the top.  His perspective is different
> from those discussed so far so I circulate it here.  I'll have to go to
the
> ASAC telecon for the rest of the morning (I did dig up my leader passcode
> Bryan).
>
> Clear skies,
> Al
>