A method that allows the positions of the sunrise reflection point to be evaluated for any day is described. The analysis is limited to the regular component of the seasonal course of the sunrise. As viewed from the observing point, the intensity of the radio waves at the horizon must be large and, with increasing elevation angle, the intensity must rapidly decrease. The occurrence of a narrow band of intense radiation extending in the azimuthal direction along the horizon is therefore expected. This model fully conforms to the assumption that the noise arrives at the receiver from a horizontal direction, which is used in the calculation here. A test of the model demonstrates that the angular dimension of the intense radiation in the horizontal direction is smaller in most cases than the halfwidth of the angular dimension of the sector resulting from the two alternative solutions.