Recent Results from the Fly’s Eye Experiment

We report on recent results from the Fly’s Eye experiment up to July 1992. The detector consists of FE1, running from 1981 to 1992, and FE2 running from 1986 till now. The monocular data comes from a single eye detector, and the stereo data are detected by both detectors and reconstructed by stereo geometry. This report includes results on the spectrum, composition, anisotropy, and a 320 EeV event. The stereo spectrum shows a dip around 1018.5eV. The composition changes from predominately heavy (below 1018eV) to predominately light (above 1019eV). The anisotropy shows no significant deviation from random fluctuation in both a small scale and large scale anisotropy search. A 320 -40 +35 × 1018eV event was detected by FE1 on Oct. 15, 1991.