Examples

In the most common usage, an atomic ANT selects all baselines containing all the antennas in ANT. ANT& selects only baselines between the list of antennas in the antenna specification. ANT1&ANT2 selects baselines between antennas in ANT1 and ANT2 only. E.g.

• baseline=1,2,3 selects baseline between antennas 1, 2 and 3 and all other antennas.
• baseline=1,2,3& selects baseline between antennas 1,2 and 3 only.
• baseline=1,2,3 & 4,5,6 selects baselines between antennas 1,2,3 and 4,5,6.

Following are more examples of baseline specification using ranges and names:

• baseline=1$\sim$ 3 same as baseline=1,2,3
• baseline=1$\sim$ 3& same as baseline=1,2,3&
• baseline=1$\sim$ 3 & 4$\sim$ 5 same as baseline= 1,2,3&4,5,6
• baseline=VLA:N* & VLA:E* selects all baselines between antennas with names starting with "VLA:N" and "VLA:E".
• baseline=21;!15 selects baselines between antenna named "21" and all other available antennas, except antenna named "15". I.e, baseline "21-15" (or its conjugate, if present in the database) is excluded.

The full baseline selection expression is any of the examples shown above or a semi-colon-separated list of baseline specifications. E.g.

• baseline=1$\sim$ 3& ; 4$\sim$ 5&10$\sim$ 15 ; VLA:N* & VLA:E*

with each elements of the semi-colon separated list being interpreted as explained above.