𝒦⁡(θ,ϕ)=P⁡{01∞012-δ-σαcos2⁡θ1-γ12-ϵ+σβ}⁢P⁡{01∞00-12+δ+σcos2⁡ϕ1-ϵ1-δ-12+ϵ-σ},