Reference Array including LBA

Whole array

Credit: NRAO

Artwork • November 2nd, 2018

The ngVLA is envisioned as an array of 244 fixed antennas, each 18m in diameter and outfitted with front ends spanning 1.2 – 50.5 and 70 – 116 GHz. The array achieves high surface brightness sensitivity and high fidelity imaging on angular scales from ~ 1000 to 1 mas by having a large collecting area fraction randomly distributed in the compact array core, spiral arms extending out to 36km for snapshot imaging, and long baseline stations extending asymmetrically to ~1000km baselines that fill the (u,v)‐plane with Earth rotation and frequency synthesis. A long baseline array provide continental-scale extended baselines (8860km), while a a short baseline array of 19 antennas, each of 6m diameter, recovers large scale structure.