ISA deviation
I'm currently studying for exams upcoming in feb and i'm going through questions to try and get it all stuck into my head firmly, since i didnt do much in the past week of christmas my brain doesnt seem to function anymore (too much drink) and i cant find the answer i need anywhere, so i was wondering if anyone could post up how to find out ISA deviation at a given FL and also the formula for NAM and NGM.
Thanks