I⁡(y,k)=Δ1/4⁢π⁢2k1/3⁢exp⁡(ⅈ⁢k⁢f~)⁢((g+f+′′+g--f-′′)⁢Ai⁡(-k2/3⁢Δ)⁢(1+O⁡(1k))-ⅈ⁢(g+f+′′-g--f-′′)⁢Ai′⁡(-k2/3⁢Δ)k1/3⁢Δ1/2⁢(1+O⁡(1k))),