SNR improvement through stacking for Rx6. Blue solid and dashed lines represent the SNR at a frequency of 0.2 Hz for the NS transmitting dipole obtained through weighted and conventional stacking, respectively. Similarly, the red solid and dashed lines represent the SNR at a frequency of 0.3 Hz for the EW transmission. The black dotted line indicates the values scaled by the square root of the stacking times from the initial SNR. Vertically, from top to bottom, the panels represent those of for E_x, E_y, H_x, H_y and H_z.