# What might some examples be of radio telescope interferometric arrays made from “cheap components relying on massive computing power”?

...consisting of very cheap components relying on massive computing power to retrieve the signals from noise...

The radio interferometers that normally come to mind for me are the VLA and especially ALMA type, where there are only dozens of dishes, each one extremely high-tech and chock full of analog and digital electronics, often linked by high speed fiber optic cables.

What might examples of arrays made from "cheap components relying on massive computing power" be?

• Depends on your definition of cheap but do you mean things like LOFAR ? – astrosnapper Sep 30 '19 at 16:00
• It could be. This is an invited question (see comments below the linked answer). That seems to fit the bill. – uhoh Sep 30 '19 at 16:01
• This sounds very obviosuly like LOFAR, which was already mentioned, and the SKA (Square kilometer array). Both arrays consists of simple antennae in the ground (cheap compared to dishes) and are 'software interferometers', relying on virtual interferometry via time-stamps. – AtmosphericPrisonEscape Sep 30 '19 at 20:40

The first phase of the MWA featured 256 128 tiles and cost A$51 million. About the MWA: http://www.mwatelescope.org/telescope It saw first light in 2013. edit: the first phase comprised 128 tiles only but I could not find out if the 51 million were the price for the first or the first and second phase. The GBT cost US$95 million and saw first light in 2003.