Interferometric

Single Field Classical mode for interferometers. Alternate between on-source cross-correlation scans and phase calibration scans. Switching can be quite fast if needed, to follow atmospheric phase variations.

Multi Field Mosaics Same as above, but on-source cross-correlation scans are taken at nearby, pre-defined positions in the sky. Alternate between on-source and phase calibration scans.

On-The-Fly Mosaics The on-source cross-correlations are taken while the antennas drift on the sky along a pre-defined pattern. Every so many scans, phase calibration scans are done.