Tilted refractive surfaces at Eglin Air Force Base, Florida

Radar ducting layers along the Gulf coast of Florida are examined for a 9-day period in May of 1976. Tilted refractive surfaces are shown to exist with enough of a slope to significantly increase the chance of radar ducting at small look angles. Radiosonde observations are found to agree with average refractometer measurements but do not detect ducting layers with small vertical depths.