How to read radiation patern in polar form from ie3d result?

hello..im still new here..erm..anyone knows how to read radiation patern in polar form for dis result..attached is a file .pat and .jpg..below is a simulated result for circular polarized antenna..how to read the data from the graph for CP whether it is good or not..thanx

It is not bad as a LHCP antenna. At theta = 0, the E-left is about 8 dBi whie the E-right is about -18 dB. Some fine tuning may lower the E-right at theta = 0 further. It is quite circularly polarized at the main direction. Certainly, it will depend upon your requirements to judge how good it is.