a01M1 0 First fiber family, initial R component a01M2 cos(betaM) First fiber family, initial PHI component a01M3 sin(betaM) First fiber family, initial A component a02M1 0 Second fiber family, initial R component a02M2 cos(betaM) Second fiber family, initial PHI component a02M3 -sin(betaM) Second fiber family, initial A component