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In this paper we study the non-Gaussian homogenous and isotropic field on theplane in frequency domain. The trispectrum and higher order spectra of such afield are described in terms of Bessel functions. Poisson formulae are givenfor the spectrum and for the bispectrum. Some particular integrals of Besselfunctions are considered as well.

Trispectrum and higher order spectra for non-Gaussian homogenous and isotropic field on the 2D-plane