Researcher from CEFOP had an internship on Lidar measurements in Germany

Antonieta Silva in the IfTAlmost three months past our researcher Antonieta Silva -Ph.D. student in Physics, Universidad de Concepción- in Germany, working with the Leibniz Institute for Tropospheric Research (IfT) in Leipzig, Germany.

Antonieta shared work with Remote Measurements on Earth group researchers, led by Dr. Albert Ansmann. There, with Dr. Jörg Schmidt’s guide, she perfected inversion algorithms set in her doctoral thesis, she worked both in instrumentation refinement and use at the laboratory, and she knew the Polly-Lidar –transportable systems, traded by the IfT- performance.

“One task I developed was an inter-comparison of the algorithms the group of Dr. Ansmann used, to confirm that all the algorithms I developed in CEFOP function properly”, said Antonieta. This work was applied to either elastic Lidar (for measuring aerosols) as inelastic or Raman Lidar (for measuring water vapor).

Antonieta emphasized that Lidar techniques development in IfT are impressive, and among all the developments she observed, she focused on the study of Lidar MARTHA (Multiwavelength Atmospheric Raman Lidar for Temperature, Humidity, and Aerosol Profiling), with 10 measurement channels. “I worked at the laboratory by changing a channel, and did the calculations to place the lenses and checked that everything was working, and took a couple of steps to this system, which was quite complex in its entirety”.

As an observation, to bring additional expertise to our Center, the researcher also knew the Polly-Lidar operation in detail. These devices are about 150 cm3, and have six to seven channels to measure the atmosphere. “They are fully integrated, portable, and come ready-to-use with the software installed. I met the researcher who builds them, who helped me with enough ideas to optimize our work in CEFOP”.

Antonieta said that this instance would contribute to a CEFOP-Lidar Observatory better development. “Being there let me know I had to correct the overlap to improve the signal in the measurement first meters. In addition, to implementing this in my code, I added some details on the pre-processing of data and some improvements in the scattering extinction for Raman wave lengths “, the researcher explained.



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