Design and Fabrication of an Atmospheric Parameter Monitoring System for Weather Forecast

Measurement of the air parameters above the Earth's surface has many research and operational applications including weather forecast. A radiosonde system is carried by a balloon up to the top of the troposphere or above it and obtains various information such as pressure, humidity, temperature, location, velocity, and wind direction at different altitudes from the Earth's surface during its climb. Then, the measured data are transmitted to the ground station using a radio transmitter. In this paper, the system design and fabrication and testing steps of a radiosonde operating at 400.6 MHz with the ground receiver and the associated antenna are described in detail. The aim of the project is to build a local radiosonde system to meet the requirements of the meteorological organization. Although the price of this system is very low compared to its foreign equivalent, its measured performance and stability under severe temperature changes are in good agreement with those of foreign counterparts.