# Background

The principle of the method is the following: the atmospheric phase fluctuations are due to different, time-varying water vapor content in the line of sight of each antenna across the atmosphere; these differences in water vapor content are measurable by monitoring their emission at radio frequencies. We thus use the differences in emission, measured by using the 1mm channel of the receivers as an atmospheric monitor, to correct for phase fluctuations in both the 1mm and 3mm windows.

Subsections

- Monitoring the atmospheric emission
- Atmosphere model
- The phase correction