SPECTROSCOPIC section
Keywords: class-average

Next: BASE section Up: Output parameters Previous: GENERAL section Contents

### `SPECTROSCOPIC` section

The `SPECTROSCOPIC` section is revised as follows:

- from the first copy of all the input header of into , the spectroscopic section inherits the values, in particular the rest and image frequencies.
- the number of channels is set to the appropriate value (according to the `COMPOSITE` or `INTERSECT` mode) computed at section .

Then, depending on the alignment rule, another set of values can be set:

- in case of channel alignment (`SET ALIGN CHANNEL`), no more values of this section are redefined.

- in case of frequency alignment (`SET ALIGN FREQUENCY`), the frequency and associated velocity parameters are set:
  - the output frequency resolution is set to the value computed at Eq. ,
  - the output frequency offset is set to ,
  - the reference channel associated to is set to where is the frequency value at channel 5, computed at Eq. ,
  - then the velocity resolution is set to where is the speed of light and the rest frequency,
  - and the velocity offset is set to

- in case of velocity alignment `SET ALIGN VELOCITY`, the velocity and associated frequency parameters are set to:
  - the output velocity resolution is set to the value computed at Eq. ,
  - the output velocity offset 6 is set to ,
  - the reference channel is set to where is the velocity value at channel , computed at Eq. ,
  - then the frequency resolution is set to ,
  - and the frequency offset is set to

Next: BASE section Up: Output parameters Previous: GENERAL section Contents