N. Gavrilov and A. Shilnikov:

(1). dx/dt = x (2+μ-β(x^{2}+y^{2}))+z^{2}+y^{2}+2y

(2). dy/dt = -z^{3}-(1+y)(z^{2}+y^{2}+2y)-4x+μy

(3). dz/dt = (1+y)z^{2}+x^{2}+η

where β varies between 0.18 and 10, and μ=0.456, η=0.0357

A bleu sky orbit underlying catastrophe, i.e. blue sky bifurcation. For [z,y,x]. (Azimut=0°, Elevation=0°). (1'' 05')

(2). dy/dt = -z

(3). dz/dt = (1+y)z

where β varies between 0.18 and 10, and μ=0.456, η=0.0357

A bleu sky orbit underlying catastrophe, i.e. blue sky bifurcation. For [z,y,x]. (Azimut=0°, Elevation=0°). (1'' 05')