θ₁

θ₂

δθ

Estimated δθ

Deviation in δθ

Fiber 1

−17.6

−15.7

1.9

2.1

−0.2

Fiber 2

−19.3

−17.2

2.1

2.0

0.1

Fiber 3

−18.4

−15.4

3.0

2.3

0.7