3D Plotting Problem, every axis with different units

Hi everyone,

I have a Problem by 3d plotting a function.

Unfortunally I don't know what the problem is about, I have 3 unit types.

W / m²

m

deg

Z-Axis should be W / m²

x axis m

y axis deg

Could please anybody check my mathcad file and correct the error, or tell me what to do?

In the second step I need to insert a constant surface into the plot, with the value of 100 W / m².

I want to compare the curve from E.IR with the constant surface. Interesting is

every E.IR value which is above the limit of 100 W / m².

Thanks a lot for your help!

PS: Here you can see my worksheet, I also attached my mathcad file.

Best Regards,

Alexander