what is does ' solar polar angle ' mean ?

Question

on this page is where i found it ..

http://www.n3kl.org/sun/images/noby_latest_17GHz.png

on the list at the right of sun's picture

Answer 1

The solar polar angle is the angle of tilt of the sun's axis.
Just as the earth's axis is tilted with respect to the plane of its orbit, so is the sun's axis tilted from the plane of the solar system.
It is the angle of the sun's pole.....hence "solar polar angle".

Answer 2

Well, I would say that it is the northern, or upper part of the Sun. When looking at any map, North is always up. It is most likely used by astronomers as a reference point...