WELCOME

IONOSPHERE AND ITS EFFECT IN AERIAL

PROPAGATIONBy Lt Arman Sharif

INTRODUCTION

AIM

To enhance your knowledge about Ionosphere and its effect in Aerial

Propagation. 

SCOPE

1. Ionosphere and its characteristics.(Phase-1)

2. Phenomenon in Ionosphere controlling Aerial

Propagation.(Phase-2)

3. Advantages from Ionosphere in Aerial

Propagation.(Phase-3)

IONOSPHERE AND ITS CHARACTERISTICS

The Ionosphere is a region of the upper , from about 50 km to 450 km altitude, and includes the thermosphere and parts of the mesosphere and exosphere.

Definition

IONOSPHERE AND ITS CHARACTERISTICS

The Region of the earth's atmosphere between the stratosphere and the exosphere, consisting of several

ionized layers and extending from about 50 to 250 miles (80 to 400 km) above the surface of the earth.

Definition

IONOSPHERE AND ITS CHARACTERISTICS

IONOSPHERE AND ITS CHARACTERISTICS

a. Covers the portion of exosphere, mesosphere and

thermosphere.

b. At day time it can stretch from 60 km up to 1000 km.

c. Consists of D, E and F layer.

d. High concentration of electrons.

e. It controls radio signal effectively.

Characteristics

IONOSPHERE AND ITS CHARACTERISTICS

a. About Ionosphere.

b. Layers of Ionosphere.

c. Characteristics of Ionosphere.

Lessons Learnt

PHENOMENON IN IONOSPHERE

1. Sources of Ionization in Ionosphere

2. Process of Ionization in Ionosphere

3. Recombination in this Layer.

4. Different Layers’ Characteristics

PHENOMENON IN IONOSPHERE

Sources of Ionization

UV Rays from the Sun

Cosmic Rays from Deep Space, Nova

Meteor Trails

Particle Radiation from the Sun Specially From Solar Storm

PHENOMENON IN IONOSPHERE

Process of Ionization in Ionosphere

1.UV rays constantly hit to our atmosphere.

2.The energy radiated by UV rays or other

sources collide with the particles forming the

ionized particles.

3.Radio signal entering to this region, is getting

refracted.

PHENOMENON IN IONOSPHERE

Recombination in this Layer

1. Particles are constantly in motion.

2. In the process they also recombine to get stable.

3. But particles remaining in this layer will be mostly

ionized.

PHENOMENON IN IONOSPHERE

Different Layers’ Characteristics

1.D Layer.2.E Layer.3.F Layer.

IONOSPHERE AND ITS CHARACTERISTICS

Ionosphere’s Effect in Radio Communication

1. Total Internal Reflection of Radio Wave.

2. Formation of Skip Distance and Skip Zone.

3. Ionosphere’s effect to increase the range of radio signal.

4. Formation of Sporadic E and Sporadic F.

5. About VHF Band.

PHENOMENON IN IONOSPHERE

1.The behavior of Ionosphere

2. characteristics of different layers

3. Ionosphere’s effect on radio communication.

ADVANTAGES OF IONOSPHERE IN AERIAL PROPAGATION

1.D Layer Helps to Determine Lowest Usable Frequency(LUF).

2. F Layer Helps to Identify Maximum Usable Frequency(MUF).

3. Helps to change the Frequency at Day and Night.

4. Helps to increase the range of HF Communication.

ADVANTAGES OF IONOSPHERE IN AERIAL PROPAGATION

1. LUF.

2. MUF.

3. Increase of range for radio communication.

AT THE END

1. Ionosphere.

2. Its Characteristics.

3. Phenomenon in Ionosphere controlling Aerial

Propagation.

4. Advantages of Ionosphere in Aerial Propagation.

ANY DOUBT

Ionosphere is the most important layer for radio communication.

CONCLUSION

PHENOMENON IN IONOSPHERE

IONOSPHERE AND ITS CHARACTERISTICS

The Region of the earth's atmosphere between the stratosphere and the exosphere, consisting of several

ionized layers and extending from about 50 to 250 miles (80 to 400 km) above the surface of the earth.

Definition