The ground reflection of winprop

lightning

Ground reflections in WinProp are very confusing to me. How can ground-reflected paths be obtained in Indoor and Urban scenarios?

For example, when I define a horizontal plane, only the direct path appears. Horizontal planes seem to behave differently from the vertical faces of buildings—do they not participate in the ray-tracing calculations?

In the 2025 version, I found that ground reflection can be enabled separately in IRT mode, but ground-reflected paths still do not appear. There is also an option related to an angle, but I do not understand its meaning.

In addition, it seems that Urban scenarios cannot use SRT mode and can only use IRT. Why is this the case?

Jaehoon

Hello,

Please see my answers below.

1.In the WinProp Indoor scenario, horizoantal planes contributes ray tracing calculations as well. The following result shows that one ground reflected ray is included in the total rays at a specific point.

2. In the WinProp ProMan simulations, the ground reflection is considered by using the breakpoint effect . Therefore, the ground reflection is activated by not only checking "Ground reflection", but also checking "Breadpoint" as explained in the WInProp user guide.

In the ProMan IRT project, you can go to "Breakpoint Settings" as show in the picture below (ProMan > Edit Project Parameter > Computation > IRT settings > Breakpoint )

For example, If you select the 2nd option, you need to give a small breakpoint distance in order to activate "ground reflection" as described in the user guide above.

3. Yes, WinProp Urban scenario has no SRT model option as shown below at the moment. Only ray tracing is supported by IRT.

Best regards,

Jaehoon