Parameter estimation for the mass spectrometric peak in the doublet

We propose a method of estimating the position and the intensity of the peak in the doublet, mostly hidden peak, whose intensity is greater than the required 10 or more times in the presence of noise. The position of the main peak at exactly this set, its shape is known with some accuracy, but the amplitude is unknown. The method allows to estimate the parameters of the hidden peak at a signal / noise ratio of ten and above, and the distance between the peaks of the half-width at half height, and more.