Atmospheric Phenomena Deduced From Radiosonde and GPS Occultation Measurements for Various Application Related Studies

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Executive Summary

Troposphere is the lowest portion of earth's atmosphere and hold approximately 80% of atmospheric airmass. The radio wave propagation through troposphere depends on refractive index of the medium. The refractive index of the medium depends on atmospheric pressure, temperature and humidity. The properties of radio wave make it an efficient tool to study the atmosphere. Earlier, atmospheric monitoring was based on radiosonde measurements. The availability of Global Positioning System (GPS) signals has given a new technique for studying the atmosphere. The GPS satellites orbiting around 20,000 km above the surface of the earth continuously emits radio signals.

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