Calibrate the collimation of the radio or optical pointing axes.

Arguments:

Model model

The pointing model to collimate.

Tilt size

The size of the tilt of the pointing axis.

DeckAngle direction

The deck angle at which the collimation tilt is parallel to the direction of increasing elevation.

Optional Arguments:

Camera number

The number of the associated optical pointing camera. If this is omitted, the pointing model of the currently selected camera is configured.

Examples:

The following example says that the radio axis is tilted 0.5 degrees outwards from the deck axis, and that when the deck angle is 23.32, this tilt is along the great circle of increasing elevation.

  collimate radio, 0.5, 23.32

Context:

The axis along which the CBI sensors are most sensitive, will not exactly lie along the deck rotation axis. The collimation command tells the control system what the misalignment is, so that it can counteract it with changes to the azimuth and elevation. The optical telescope and the radio receivers will have different collimation parameters, whereas the rest of their pointing models should be the same, so this command requires that you specify which pointing axis you are refering to.

Before the control system can point the telescope accurately at a source, the collimate command should be called once for each pointing model, to set the collimation parameters.