Compact Configuration Options

Al: A distinct advantage of configurations 1,3,6 is that they allow long tracks, which results in better beams or in increased scheduling flexibility.

Simulations done at 300 GHz with longest baseline 120m

Array CSV 1 2 3 4 5 6
Beam 2.1x2.1 1.8x1.7 1.7x1.7 1.7x1.7 1.7x1.5 1.9x1.6 1.7x1.5
Max sidelobe (%) 22 9 11 6 12 10 8
Close lobe (%) 8 1 3 3 1.5 6 2
shadowing at d+10, HA+-4 (%)   6.5 9.8 5.1 13.7 16.2 4.9
50% flux recovery Gaussian size 5.3 6.8 7.2 6.8 7.3 7.4 6.8
shortest projected spacing 17.2 13.5 12.7 13.5 12.5 12.3 13.5
bowl depth in 5" Gaussian image   8 10 8

Array CSV 1 2 3 4 5 6
max +-HA shadow<10% at d+10   4.5h 4.0h 4.5h 3.5h 3.2h 4.6h
Max sidelobe (%) ... 6.7% ... 5.6%   9.1% 6.3%
Close lobe (%) ... <1 ... <3 ... 6 <2

This topic: ALMA > WebHome > AlmaSci > AlmaTiger > TestData
Topic revision: 2011-02-16, AlWootten
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