θ₁

θ₂

δθ

Estimated δθ

Deviation in δθ

Fiber 1

28.5

24.3

−4.2

−3.6

−0.6

Fiber 2

31.5

26.0

−5.5

−2.7

−2.8

Fiber 3

−8.8

−6.4

2.3

1.2

1.1

Fiber 4

2.6

1.5

−1.1

−2.1

1.0