How did you come up with your antenna numbering scheme?
Yes, I agree that it certainly looks a bit odd, so here's a recap of the reasons and a bit more explanation.
For the High-Band Antenna array, the logic is as follows:
- The project has 48 'tiles' and we devised the 24+12+12 layout to suit our primary science objectives and environmental concerns.
- However, we wanted to still keep the option of converting to a full-size LOFAR station one day. That has 96 tiles in a circular pattern, numbered by row, but with a "hole" in the centre (Tile ID = "HCC"). Sets of LOFAR layouts are shown here: http://kaira.sgo.fi/2011/02/hba-layout-part-1-lofar.html
- So, we superimposed our layout on the standard full-size layout and used the numbering system that resulted. The one tile that would not be in the full size layout was originally referred to by Tile ID = "HXX", which later became "H96".
- There is a diagram (which should help) here: http://kaira.sgo.fi/2011/06/hba-configuration.html
For the Low-Band Array, the layout (LINK) works like this:
- A standard LOFAR remote station has 48 aerials in a scatter pattern.
- We started with this layout for antennas "L00" to "L45".
- These start "L00" in the centre, then increment anti-clockwise in rings.
- However, there are two "out-rigger" antennas ("L46" and "L47") in the LOFAR setup which are 80-90 metres away. These could not be used at KAIRA owing to terrain issues.
- So we made them "fit" somewhere in our array circle, but ran a massive simulation to find the spots where they would give the best beam performance. That's why these last two seem a bit oddly placed.
I hope that clears things up!