azimuth-by-altitude table: where to enter values for plain north?

Hi there,
I am a little confused with the design of the azimuth-by-altitude table. The example table in SAM starts with azimuth = 20 and then goes up to 340 in 20 degree increments.So where does SAM get the values for 0 degrees azimuth, plain north, here?Assuming I stick with 20 degree increments, can I start the second column with azimuth = 0 and end with azimuth = 340? Or should I start with azimuth = 20 and then end with azimuth = 360?What is the best procedure here to ensure that the values are calculated correctly?Thanks in advance

Hi Paul,thank you for your answer. I forgot to attach a screenshot that may explain my question.I assume that with the example table (see attachement) SAM will interpolate the values for azimuth = 0 between the values for 20° and 340°.I'm working on a solar module geometry that needs distinct shading values for plain north (azimuth = 0), so I need to add a "0°-column" (or maybe a 360°-column?). Will SAM accept a 0°-column let's say as second column in the table, right after the values for sun height? Or is it more difficult?Just wanted to make sure that I don't generate shading tables that don't work correctly.Greetings from MunichMirko