Sets the angular position of the guide probe.
2=to: 2!:}Format: AUTOTHETA <thetaposition>
2=to: 2!:}Example: AUTOTHETA 50000
2=to: 2!:}Units: Millidegrees.
2=to: 2!:}Range: 0 to 180000.
2=to: 2!:}Comments: Note that values less that 35000 may cause the probe to vignette the slit viewing optics.