IAM user profile with optimisation for angles not 0°

[simonsolar]

Dear all,

in thin film technology the angular behaviour can be optimized to different angles than 0°. However the IAM definition takes only values under 1. The value at 0° should by definition of STC be 1, so a technology which has an angle optimisation at for example 30° can therefore not be reflected properly.

IAM example:

inc. angle IAM

0 0,97

30 1,00

40 0,98

50 0,93

60 0,85

90 0,00

Is it clear what I mean? How can I implement an IAM with the values of 1 at 0° and an optimisation at higher degrees?

Best regards,

Simon