The Array AOS (aAOS) provides four independent spectrometer channels, each with ~1 MHz of spectral resolution over a 1 GHz bandwidth. At 810 GHz, these numbers translate to 0.37 and 370 km/s respectively. The optical lay-out of the AOS is shown in Figure 13, and a photo of the aAOS rack in the SORAL lab is shown in Figure 14. It uses a single laser, a 4-channel Bragg cell, and a custom CCD to achieve its performance parameters. The aAOS has been successfully tested on the IRAM 30m, CSO, and with Pole STAR.

Figure 13: Optical layout for the aAOS Click on thumbnail for full-size image! Figure 14: The aAOS rack in the lab Click on thumbnail for full-size image!