[asac]science examples for calibration review

[Christine Wilson]

Hi, everyone,

As we discussed in our telecon last week, one of the first tasks of the 
calibration group is to review the calibration requirements for ALMA (see 
text of draft Level 2 milestone below). This review is to include science 
examples and this is an area where the ASAC can provide useful input to 
the process.

I ask you all to try to come up with one example of science that will be 
done by ALMA. For examples of the types of things, you can have a look at 
the science examples in the stringency report from our last face-to-face 
meeting.

Stephane will circulate a summary of the key calibration issues by email 
in the next day or so. If you can design a science example to exercise 
one of these specific issues (i.e. 1% calibration accuracy, total power
stability, etc.), that would be excellent. But even if your favorite 
science example doesn't seem particularly difficult for ALMA to achieve, 
please pass it on, as I think having a good range of science examples 
will be important for this exercise.

Please send your contributions to John Richer and me by 
Monday, December 2. 

Thanks,
Chris

Level 2 milestone: 
     Review of calibration requirements with science examples complete. 
     This includes: phase, amplitude, bandpass, polarization, antenna 
     location, illumination offset, pointing, focus, delay, opacity, 
     and decorrelation correction.   How and where and at what frequency 
     opacity is required to be measured at the site.