Low Frequency Aperture Array

The LFAA Element, a work package executed by the Aperture Array Design & Construction (AADC) Consortium, is one of the elements of the SKA1-LOW telescope and is defined as the antenna array stations, including the station signal processing, control and calibration. The work is set out in the Statement of Work agreed with the SKAO.

 

The AADC Consortium team started working together in 2010 with a specific focus on SKA-LOW. Longer connections go back to SKADS, an EU FP6 project which started in 2005. The formation of the Consortium was therefore based on previous work and groups, which made it possible to move quickly to the actual realization and testing of prototypes. In particular Aperture Array Verification System 0.5 (AAVS0.5), was installed at the Murchison Radio Observatory as early as May 2013. This system has proven to be very valuable already (The initial LFAA specification sought to define an array capable of operating from 70-450MHz).
The three SKA low-frequency pathfinders and precursor telescopes, LOFAR, NenuFAR and MWA, have been designed and realized and are currently operated by members of the AADC Consortium. The experience and knowledge gained is directly available for LFAA. Furthermore both LOFAR and MWA can be used as a test bed for new LFAA technology, this has already been proven to be very effective, most notably in the case of AAVS0.5 and MWA.

 


 

November 1st, 2013 marks the start of Stage 1 of the SKA1 preconstruction phase, to be finished in March 2015. The Preliminary Design Review (PDR) is a crucial milestone at the completion of Stage 1. As well as the design documents for PDR, intermediate deliverables have been generated and accepted. By the end of January, the AADC Consortium successfully passed its PDR!

 

In March 2015 the SKA members decided that SKA1-Low in Australia should be built. 50% of the planned 262,144 low frequency dipoles should be deployed. The array should cover the frequency range 50-350 MHz, as planned. The current planned baseline lengths of ~80km should be retained. The inclusion of a pulsar search capability for SKA1-Low (currently an Engineering Change Proposal on hold) should be actively explored.

 


Design: Kuenst.    Development: Dripl.    © 2020 ASTRON