Q5: (a) Calculate the electron density required to return a signal at fre quency of 12 MHz incident on the lowest layer of the ionos phe re at an angle of 30° with respect to normal. Repeat the calculatio ns when the signal frequency is increased to 30 MHz at incidence angle of 20°. Comme nt on the obtained results.

Q5: (a) Calculate the electron density required to return a signal at fre quency of 12 MHz incident on the lowest layer of the ionos phe re at an angle of 30° with respect to normal. Repeat the calculatio ns when the signal frequency is increased to 30 MHz at incidence angle of 20°. Comme nt on the obtained results.