Na Lidar Group
The "Gold" beam at CASS at Utah State University is a unique lidar system that explores the boundary between the atmosphere and geospace (80-110km in altitude). The system is built on MOPA (Master-Oscillator-Power-Amplifier) technique, which generates laser pulses with narrow bandwidth at three different frequencies near sodium D2 line. Thus, it can provide temperature and horizontal wind information in full diurnal cycle (under clear sky condition) based on Doppler-broadening and Doppler-shift of the laser induced fluorescence spectrum by the mesospheric sodium layer. These measurements are critical for studying the upper atmosphere dynamics as well as its coupling with the ionosphere. The USU Na lidar is part of the NSF Geospace Facility under the program of Consortium of Resonance and Rayleigh Lidar (CRRL).