Building a 'Simple' Interferometer

Here's an overview of how a Simple interferometer goes together.

Each of the two dual dipole antenna's run back to their own T1056 radio receiver.

In the base Simple design, one receiver provides the heartbeat to the other via an external amplifier kit.

The audio output of the receivers are then used as the left and right channels to plug into the PCs sound card.

The PC is running Linux as the OS and the audio inputs are processed by Dave Brodrick's Simple Audio Correlator (SAC) application. SAC then performs the correlation and writes the corresponding data to the hard drive.

To display the data you can then run either of Dave's "sacmon" application locally or the new Java based application on any remote system over a network (LAN/WAN/Net). Here's a picture of the setup:

 

What's In A Name?

On a somewhat less serious note, as everyone knows that's ever had something to do with a technology project, it's critical to have a catchy name. Preferably an acronym. The first such interferometer built at Narrabri by the CSIRO team is "Simple" which still runs today. Dave Brodrick then built "Simple Too" which is primarily used for development these days. Following the trend, my interferometer is known as "S3".

Now it might seem obvious that the next interferometer built would be "S4"? "SIV" maybe, for the Roman numerals equiv? Well, like all good tech naming conventions you need to change the scheme when it becomes too obvious. Hence Dave's production interferometer is "YASI" - Yet Another Simple Interferometer. Dusty has named his beastie "SEMI" - Simply Elegant Meridian Interferometer. Crystal?

If you intend to build one of these simple interferometers you should dedicate any spare mental background processing cycles to coming up with an appropriately catchy name =) The only real consideration is that it should have or imply the "Simple".