## Mixing conventions between observation and analysis

For the moment, CLASS assumes that the data were observed in the observatory frame using a doppler tracked tuning frequency that follows the radio convention. However, the observations may have been done using the relativistic or optical convention. This section deals with the consequences of this mis-match between observation and analysis.

Subsections

- General case
- The IRAM-30m case as of 2019-07-06
- The APEX case as of 2019-07-06