AIPS HELP file for ANTENNAS in 31DEC20
As of Sat Feb 22 15:49:57 2020
Type: Adverb (REAL(50))
Use: Standard data selection adverb, used to specify a list of antennas
to be included in, or excluded from, an operation. If any element
of the array is negative then all antennas given are excluded;
else all are included. The antenna numbers used are the absolute
values of the elements of ANTENNAS.
Null Value: 0
ANTENNAS = 0 usually means all antennas.
ANTENNAS is often used with BASELINE. In that case, a baseline
between antenna I and J is selected (or deselected if any of
ANTENNAS or BASELINE are negative) if
# in ANTE # in BASE Selected or de-selected if
0 0 always
>0 0 (I in ANTE) .OR. (J in ANTE)
0 >0 (I in BASE) .OR. (J in BASE)
>0 >0 ((I in ANTE) .AND. (J in BASE)) .OR.
((I in BASE) .AND. (J in ANTE))
Verbs VLA, EVLA, VLBA, and HSA may be used to set values into
ANTENNAS (or any other adverb array). In this case, the equals
sign is required, e.g.,
ANTENNAS = EVLA
BASELINE = VLA
to process all baselines between new EVLA and old VLA antennas.
Be careful of INNAME et al., SUBARRAY, and DOINVERS which
control what these verbs actually do.
1. BASELINE=0; ANTENNAS=0
2. BASELINE=0; ANTENNAS=1,2,3,4,5,6
include only baselines between antennas 1 through 6
3. BASELINE=0; ANTENNAS=1,2,-3,4,5,6
include only baselines between antennas 7 through N
4. BASELINE=0; ANTENNAS = 11,-19,27
exclude any baseline involving antennas 11, 19, and/or 27
thus, exclude 1-11, 7-19, 11-19, 26-27, etc. etc.
5. BASELINE=1,2,7; ANTENNAS=3,4,5
include baselines 1-3, 1-4, 1-5, 2-3, 2-4, 2-5, 3-7,
4-7, 5-7 only
6. BASELINE=1,-2,7; ANTENNAS=3,4,5
include all baselines except 1-3, 1-4, 1-5, 2-3, 2-4, 2-5,
3-7, 4-7, 5-7
7. BASELINE=-10; ANTENNAS=-10
exclude baseline 10-10 (autocorrelation), include all other
baselines including those to antenna 10.