Improved numerical solution of Ott's integral equation for HF ground wave attenuation

An alternative solution is presented for Ott's (1970) integral equation for the attenuation of a high-frequency vertically polarized radio signal propagating over rough inhomogeneous terrain. The method circumvents the numerical stability occurring with an earlier method at steep slopes and/or high radar frequencies. The method is illustrated by application to a steep profile at 20.08 MHz. The obtained values for the attenuation function agree well with experimental measurements.<
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