GT-LIF
Georgia Tech Laser-Induced Fluorescence

The Georgia-Tech Laser Induced Fluorescence (GT-LIF) is an airborne in situ sensor that detects nitric oxide (NO), formaldehyde (HCHO), and nitrogen dioxide (NO2). It uses laser-induced fluorescence, which excites gas molecules to a higher energy state and then detects the emitted fluorescence as they return to a lower energy state. The emitted fluorescence helps determine gas concentrations and mixing ratios. For NO, molecules are excited at 226 nm, with fluorescence detected at 247 nm. HCHO is excited at 353 nm, and its fluorescence is detected at 400-450 nm, while NO2 is excited at 435 nm and detected around 780 nm.