Reflections generally affect polarization. For radio waves, one important reflector is the ionosphere which can change the wave's polarization. Thus for signals received following reflection by the ionosphere (a skywave), a consistent polarization cannot be expected. For line-of-sight communications or ground wave propagation, horizontally or vertically polarized transmissions generally remain in about the same polarization state at the receiving location. Matching the receiving antenna's polarization to that of the transmitter can make a very substantial difference in received signal strength. COUNT 5
QSN1 What mostly affects polarization? ANS1 Reflections QSN2 What reflector can change the waves polarization? ANS2 ionosphere QSN3 What will you be matching with the  receiving antenna's polarization? ANS3 transmitter QSN4 What stays the same regarding polarization state at the recieving location? ANS4 polarized transmissions QSN5 What is the name used for signals recieved following reflection by the ionosphere? ANS5 a skywave