To: atm{at}shore.net
From: Jim Burrows 
Reply-To: Jim Burrows 


At 11:14 2003-03-19 +0000, Garth Arsenault wrote:

>First question: My center zonal mask (1) is cut so that the two open
>slots on the mask have an inside radius of 1" and outside radius of
>2.236".  Am I correct in using the null point of this zone as 0.000"
>during the analysis?

I think Figure45 chooses the representative radius for you in terms of
inside and outside radii.  If not, the best choice is Nils Olof's formula:
ave(ave+rms) = 0.5*(0.5*(1+2.236)+sqrt(0.5*(1ý+2.236ý))) = (A+B)/4+
POL(A,B)/ SQR8 (on my calculator) = 1.675.

         -- Jim Burrows
         -- mailto://burrjaw{at}earthlink.net
         -- http://home.earthlink.net/~burrjaw
         -- Seattle N47.4723 W122.3662 (WGS84)

--- BBBS/NT v4.00 MP