ASKAP is designed to be a high speed survey instrument with high dynamic range. This requires an extremely wide field-of-view interferometer with Phased Array Feeds (PAFs) consisting of 188 elements, with 96 in each of two polarisations as the focal plane detectors.
The specification for ASKAP is:
A total collecting area of approximately 4,000 square metres, from 36 antennas each 12 metres in diameter
System temperature less than 50 K
Frequency range from 700 MHz to 1.8 GHz
300 MHz instantaneous bandwidth
36 independent beams, each of about 1 square degree, yield overlapping to a 30 square degree field-of-view at 1.4 GHz
Maximum baseline of approximately 6 km
Full cross-correlation of all antennas
Possible remote array station capability located in NSW, approximately 3,000 km from the core site.
To achieve the ASKAP specification, the project's technological goals are to develop:
10x10 dual polarisation receivers operating over the frequency range 700 MHz to 1.8 GHz, one in each of 30 parabolic reflector antennas
Radio Frequency Interference (RFI) and spectral line ripple cancellation using the receiver response
RF and IF beam-forming to give extremely wide fields of view
High polarisation purity
Correlation of large number (in the order of order 30) independent beams
Wide band operation with low RFI levels
Proof of infrastructure in remote desert environment (power supply, on site data transport)
Cooling of the instrument's phased array feeds
e-VLBI capability over a 3,000 km baseline.
Opportunities for Industry
Information on opportunities for industry to be involved in the development of ASKAP can be found on the industry page.