  The possibility to observe the diurnal variations in the count rate of dark
photons using the multicathode counters is investigated. We show that placing
detectors at three different mines at different latitudes: Pyh\"asalmi in
Finland, Baksan at Russia and INO in India and conducting the measurements with
three different orientations of detectors one can obtain quite a complete
series of data to determine the direction of the dark photon field. We present
the results of the measurements fulfilled by the presently developed counters.
