This work has been done as part of my second degree research. The objective of the work was to develop a computer user friendly program using MATLAB to demonstrate virtually about the physics of the Earth's magnetic field. The objective has been successfully achieved. The system can be used to demonstrate the spatial and temporal variation of the Earth's magnetic field strength. Also, it can be used to see the direction of the Earth's magnetic field, which is directed from the geographic South Pole to the geographic North Pole.The user can change the input of the system and learn about the...

This work has been done as a partial fulfillment for my second degree study in applied Physics. The book describes a potentially useful technique for studying the D region ionosphere, which is difficult to study with most well known instruments like ionosonde, using lightning generated VLF waves. In this work the lightning generated Very Low Frequency (VLF) waves that are reflected by the D-region ionosphere have been recorded using Stanford AWESOME VLF receiver.From this data the night time electron density profile , reflection height (altitude) of Low Latitude night time D-region...