What abaut the weather?

We want to mesure the quality of the air on shore in Denia. We use an Arduino board and a software to mesure the quality of the air and his geolocalitation. We use a GPS module to determine the position and a sensor CO2 to mesure the quality of the air. We mesure also the temperature and the barometric pressure. This information is transmeted to the computer throught a  yagy antenna. Estuding the size of the antenna and the frequency of reception to make the antenna.