Select between the optical and radio pointing models.

Arguments:

Model model

The pointing model to be used (radio or optical).

Example:

The following example selects the optical pointing model.

  model optical

Context:

In addition to the CBI radio receivers, a small optical telescope is mounted on the deck of the CBI. This is used for measuring the pointing model. Unfortunately it isn't possible to precisely align the optical telescope along the same axis as that of the average radio dish, so it needs a different collimation model. The model command allows one to select between the two pointing models.