In the following, we follow Holdaway's discussion. Following studies by Kogan and Helfer, we adopt double ring configurations of 64 12m antennas characterized as follows.
(1) Compact array: Filled array with d=150m.
(2) Semicompact array: Donut array with dmin/dmax=0.5; dmax=420m, dmin=210m.
(3) Intermediate array: Donut array with dmin/dmax=.75; dmax=1110m, dmin=830m.
(4) Large array: Donut array with dmin/dmax=0.9; dmax=3000m, dmin=2700m.
(5) High Resolution array: Ring array with d=10000m.
Guilloteau has proposed studying the combination of (1) and (2) above into a single array; we do not consider this at the present time.
We assume antennas defined by the request for proposals for construction of the prototype antennas. The expected aperture efficiency has been taken from Table 1 of MMA Memo No. 243.
Receiver sensitivity is assumed to be 20 K at 7mm, 30K at 3mm, and
6
+ 4 K, SSB, to 850 GHz (see MMA Memo No. 243, Butler et al
1999). The atmosphere is assumed to be characterized
by 1mm of precipitable water vapor, close to the median value presented in
'Recommended Site for the Millimeter Array'. Opacities are calculated at
the various frequencies according to MMA Memo No. 187 (Holdaway and Pardo,
1997). The resulting array sensitivity is given in Table 1.
| Frequency (GHz) | Continuum (mJy) | (1 km s-1); mJy | (25 km s-1); mJy |
| 35 | .015 | 3.9 | 0.77 |
| 90 | .026 | 4.2 | 0.84 |
| 140 | .035 | 4.5 | 0.90 |
| 230 | .060 | 6.1 | 1.2 |
| 345 | .14 | 11. | 2.2 |
| 409 | .25 | 19. | 3.8 |
| 650 | 1.9 | 120. | 23. |
| 850 | 3.4 | 180. | 36. |