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** Description:** Mathematical instrument, allowing on the criterion of a maximum of logarithm of relation of verisimilitude to synthesize the algorithm of the optimum measuring of Doppler frequency of signal, reflected from a target, spot above a sea outside distance of line-of-sight is developed in the article. The feature of this article is a receipt of the sought after algorithm for the arbitrary cross-correlation function of fluctuation of phase as it applies to the use of phasometer method of measuring of Doppler frequency, signal reflected from a target.

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Keywords:
** measuring device of Doppler frequency, low-flying target, radio horizon

Karlov, V.D., Kondratenko, A.P., Sheigas, A.K. and Sitnik, Iu.B. (2014), “K voprosu o izmerenii doplerovskoi chastoty signala, otrazhennogo ot tseli, lotsiruemoi za predelami radiogorizonta nad morem”,