[mmaimcal] ALMA sensitivity

[Mark Holdaway]

> I have updated the sensitivity calculations for ALMA.  I put a short
> explanation on the agenda for the next meeting, on 13 September.
> http://www.cv.nrao.edu/~awootten/mmaimcal/13sep99.html
> Basically, I followed the prescription which Bryan & Co. gave
> in MMA Memo No. 243, with roots back to Holdaway's memo on US/European
> collaboration possibilities.
> 
  ... with roots back to Bob Brown's "uniform assumptions about array
sensitivity" document, which never was a memo.

Given the array specifications, you should also extend the calculations
to yield the brightness sensitivity as a function of freq and array
config.

	-Mark