Details of ASKAP's expected system parameters, survey speed and sensitivities are given below.
ASKAP System Parameters
The system parameters for ASKAP are given in the table below:
Number of dishes
36
Dish diameter (m)
12
Dish area (sq m)
113
Total collecting area (sq m)
4072
Aperture efficiency
0.8
System temperature (K)
50
Field-of-view (deg2)
30
Frequency range (MHz)
700-1800
Bandwidth (MHz)
300
Maximum channels
16384
Maximum baseline (km)
6
Notes to the table: The system temperature and aperture efficiency have yet to be determined and the numbers above are indicative only. The field-of-view is independent of observing frequency.
Details and performance of the intial array configurations can be found on the Array Configuration web page, with the PDF available here[2.6MB PDF].
Survey Speed and Sensitivity
The survey speed and sensitivities tables from the configuration document are repeated here:
Parameter
10''
18''
30''
90''
180''
units
Continuum survey speed (300 MHz, 100 uJy)
220
361
267
54
17
deg2/hr
Line survey speed (100 kHz, 5 mJy)
184
301
223
45
14
deg2/hr
Surface brightness survey speed (5 kHz, 1 K)
-
-
1.1
18
94
deg2/hr
Table 1: Indicative survey speeds for different angular resolutions under the assumption of a 50 K system temperature and an aperture efficiency of 0.8.
Parameter
10''
18''
30''
90''
180''
units
Continuum sensitivity (300 MHz)
37
29
34
74
132
µJy/bm
Line sensitivity (100 kHz)
2.1
1.6
1.9
4.1
7.3
mJy/bm
Surface brightness sensitivity (5 kHz)
-
-
5.2
1.3
0.56
K
Table 2: Indicative sensitivity for 1 hour observation at different angular resolutions, assuming 50 K system temperature and an aperture efficiency of 0.8.
