Radio emission from a point cosmic source located in the equatorial plane is received using two identical antennas located in the east-west direction at a distance L = 200 m from each other. The sum of the signals coming from both antennas via cables of the same length is supplied to the receiver input circuit. How does the voltage amplitude U0 on the input circuit of the receiver change as a result of the rotation of the Earth if the wavelength l = 1 m?

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