Environmental Impacts

Question 1

The frequency at or blow which the wve gets reflected from the ionosphere and above this frequency waves penetrate through ionospheric layer.

Answer 1

Critical Frequency

Question 2

The highest angle at which you can send a radio wave into the ionosphere and have it return to earth.

Answer 2

Critical Angle.

Question 3

The maximum frequency which can be reflected fora given distance of transmission. Will bounce of the highest ionospheric layer.

Answer 3

Maximum Usable Frequency

Question 4

Typically 80% to 85% of the MUF

Answer 4

Optimam Working Frequnecy (OWF)

Question 5

What is troposcattering?

Answer 5

Radio waves are reflecting off the irregularities and variations in the density of the troposphere such as atmospheric turbulence, moisture, and temperature gradients. Allows ducting.

Question 6

Radio waves propagate over the earth’s surface in low and medium frequencies. LOS communication.

Answer 6

Ground Waves

Question 7

The lowest frequency that would permit acceptable performance of a radio circuit by signal propagation via the ionosphere. Will bounce off the lowest ionospheric layer.

Answer 7

LUF (Lowest Usable Frequency)

Question 8

How many layers to the ionosphere during the day?

Answer 8

4

Question 9

How many ionospheric layers at night?

Answer 9

1

Question 10

Answer 10

Question 11

Is there better wave propagation at day or night?

Answer 11

Night - Not as many ionospheric layers to fuck it up