Yes, the "notepad" method for measuring speed does take into acount AoB, so at first instance, you shouldn't really need an AoB of 90 degrees, but in fact should be able to work with any AoB. Nevertheless, limitations on how the trigonometric functions themselves behave in the real "math" world make them very susceptible to errors for AoB's which are significantly different from 90 degrees.
So long story short: Theoreticaly, you should be able to cope with any AoB, in practice, you get better results with an AoB that is close to 90 degrees.
|