Configure the orientation angle of the TV display.

Arguments:

PointingOffset angle

The deck angle at which the sky appears to be upright on the TV display.

Boolean rotates

Specify this as true if the camera is mounted on the rotating part of the deck platform.

Optional Arguments:

Camera number

The number of the associated optical pointing camera. If this is omitted, the angle associated with the currently selected camera is set.

Example:

The following example tells the tracker task that the TV display will display an upright image when the deck axis is at 50 degrees.

  tv_angle 50.0, true

Context:

In order for the tv_offset command to be able to convert horizontal and vertical offsets on the TV display into incremental azimuth and elevation tracking offsets, it needs to know the fixed orientation angle of the optical telescope relative to the deck platform. The tv_angle command is the means by which this number if provided. Once the angle has been measured, this command should be placed in the rtc.init startup schedule.