Abstract
A concept of innovative rotational Raman lidar with daylight measurement capability is proposed to measure the vertical profile of temperature from the ground to the middle stratosphere. The optical filtering is made using a Fabry-Pérot Interferometer with line spacing equal to the line spacing of the Raman spectrum. The detection is made using a linear PMT array operated in photon counting mode. We plan to build a prototype and to test it at the Haute-Provence Observatory lidar facility. to achieve a time resolution permitting the observation of small-scale atmospheric processes playing a role in the troposphere-stratosphere interaction as gravity waves. If successful, this project will open the possibility to consider a Raman space lidar for the global observation of atmospheric temperature profiles.
Highlights
Rotational Raman spectrum of molecular nitrogen, the temperature being deduced from the evolution of the relationship between the spectral lines
An elegant solution to solve this problem proposed by [7] is to transmit the optical signal through a Fabry-Pérot interferometer (FPI) with a line spectral spacing exactly equal to the spacing between the lines of the N2 rotational Raman spectrum (7.958cm-1 [6])
The objective is to build a prototype and to test it in the NDACC station at Haute-Provence Observatory to benefit from the facilities available on site. Such a system will be able to perform a continuous survey of the temperature profile from the surface to the middle stratosphere, providing a powerful tool to study the variability of the temperature profiles due to atmospheric processes and could serve as a reference to define a future space lidar for measuring the temperature in the troposphere and lower stratosphere
Summary
Rotational Raman spectrum of molecular nitrogen, the temperature being deduced from the evolution of the relationship between the spectral lines. The top of the stratospheric aerosol layer (about 30 km), Mie scattering is negligible and the received signal due only to Rayleigh scattering is directly proportional to the atmospheric density.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
