VLA Exposure Calculator
Purpose of Calculation
Array Configuration
A
B
C
D
A
B
C
D
Number of Antennas
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
Polarization Setup
Single
Dual
Type of Image Weighting
Natural
Robust
Representative Frequency
Hz
kHz
MHz
GHz
Hz
kHz
MHz
GHz
Receiver Band
Unspecified
Approximate Beam Size
Unknown
Number of Frequencies
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
Session Includes Pointing
False
True
False
True
Digital Samplers
3 bit
8 bit
Elevation
Zenith (90 degrees)
High (50-90 degrees)
Medium (25-50 degrees)
Low (10-25 degrees)
Zenith (90 degrees)
High (50-90 degrees)
Medium (25-50 degrees)
Low (10-25 degrees)
Average Weather
Winter
Spring
Summer
Autumn
Winter
Spring
Summer
Autumn
Calculation Type
Time
BW
Noise/Tb
Number of Sources
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
Time on Source (UT)
0h 0m 0s
Total On-Source Time
0h 0m 0s
Total Time (UT)
0h 0m 0s
Frequency Bandwidth
Hz
kHz
MHz
GHz
Hz
kHz
MHz
GHz
Line Velocity Width
m/s
km/s
m/s
km/s
RMS Noise (units/beam)
µJy
mJy
Jy
µJy
mJy
Jy
RMS Brightness (temp)
K
mK
°C
°F
R
K
mK
°C
°F
R
Confusion Level
0.0Jy
Overhead Explanation
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January 2025