( φ , λ )

λ = 0 ˚

λ = 15 ˚

λ = 30 ˚

λ = 45 ˚

λ = 60 ˚

λ = 75 ˚

φ = 0 ˚

0

0

0

0

0

0

φ = 15 ˚

0

1 2 26 + 15 3

1 + 3 2 6

2 3 2

6 3 3 2

2 + 3 2

φ = 30 ˚

0

2 3 2

1 2 3

1 2

3 2

2 + 3 2

φ = 45 ˚

0

7 2 2 3

1 6

1 2

3 2

3 2 + 2

φ = 60 ˚

0

3 + 2 3 2

1 2

3 2

3 2

3 + 2 3 2

φ = 75 ˚

0

2 3 2

1 + 3 2 6

2 + 3 2

3 ( 2 + 3 ) 2

26 + 15 3 2