Abstract
A 3‐D ray trace model has been constructed and employed in an examination of horizontal deflection effects due to a cyclonic ring. The ring examined had a radius of 125 km, a maximum flow rate of 100 cm/s, and a maximum isotherm uplift of 300 m. Effects of fluid motion on ray geometry were found to be negligible; but horizontal gradients of the index of refraction caused significant deflection. The maximum deflection of 0.75° occurred for a ray traveling along the SOFAR channel axis. Rays which oscillate about the SOFAR axis experience less horizontal deflection. An examination of deflection versus impact parameter indicates that the rays which encounter the eddy with an impact parameter of roughly one‐half of the eddy radius experience maximum deflection. A group of rays launched in the same vertical plane experiences an azimuthal angle dispersion of 0.5° in crossing the eddy. [Work supported by the Office of Naval Research.]
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