RL-GO Ray Launching Settings

A number of ray launching geometrical optics (RL-GO) settings are available.

On the Solve/Run tab, in the Solution settings group, click the  Solver settings icon. On the Solver settings dialog, click the High frequency tab.

Adaptive ray launching settings

This option allows you to control the density of the rays launched, as well as when to stop tracing a ray based on the ray's decay.

• High (more rays): The ray density is high. Results take longer to obtain but with higher accuracy.
• Normal (default): The default ray density setting.
• Low (fewer rays): The ray density is low. Results are fast to obtain but with lower accuracy.
  Note: Start with Low (fewer rays) which uses the least computational resources. When the model appears to be performing as expected, use a higher setting.

Fixed grid increments

This option allows you to specify the ϕ and θ angular resolution for ray launching and the increments for the parallel ray front in the U direction and V direction. Though the run-time for a problem involving RL-GO may be decreased using this option, it may influence the accuracy of the solution.

Note: Manual specification of the angular increment should only be used under specific conditions after the implications have been carefully considered.