Design of sun tracking system for FTIR monitoring of atmospheric composition

An atmospheric composition monitoring system, in which the sun-tracking and FTIR spectroscopy are combined, is introduced. The ATmega 128 chip is used as a controlling core of the tracking section of the system to realize real-time tracking of the sun in combination with the optics, electronics, GPS module, PSD position sensor and mechanical section. The spectral data gained by FTIR spectrometer and the computer is applied to the atmospheric composition monitoring. The system was verified by the experiments. The experiments show that the system is stable and reliable, and its tracking accuracy is within 0.3.