Dr. Valentin B. Simeonov Profile

Dr. Valentin B. Simeonov

Scientific Collaborator at EPFL

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Author

Publications (19)

Proceedings Article | 24 October 2018 Paper

Raman lidar in operational meteorology

B. Valentin Simeonov, Todor Dinoev, Ilya Serikov, Sergei Bobrovnikov, Alexander Hafele, Giovanni Martucci, Daniel Leuenbergerd, Bertrand Calpini

Proceedings Volume 10779, 107790I (2018) https://doi.org/10.1117/12.2501987

KEYWORDS: LIDAR, Raman spectroscopy, Meteorology, Temperature metrology, Nitrogen, Atmospheric modeling, Telescopes, Humidity, Backscatter, Temporal resolution

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Proceedings Article | 30 August 2017 Presentation + Paper

First principle calibration of water vapor Raman lidars

Valentin Simeonov

Proceedings Volume 10406, 104060D (2017) https://doi.org/10.1117/12.2275314

KEYWORDS: Calibration, LIDAR, Raman spectroscopy, Laser scattering, Raman scattering, Molecules, Scattering, Nitrogen, Microwave radiation

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Proceedings Article | 20 October 2014 Paper

Instrumental correction of the uneven PMT aging effect on the calibration constant of a water vapor Raman lidar

Valentin Simeonov, Shlomo Fastig, Alexander Haefele, Bertrand Calpini

Proceedings Volume 9246, 92460N (2014) https://doi.org/10.1117/12.2066802

KEYWORDS: LIDAR, Calibration, Raman spectroscopy, Nitrogen, Photomultipliers, Light emitting diodes, Environmental sensing, Mirrors, Light sources, Sensors

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The water vapor profile derived from Raman lidar measurements is obtained by taking the ratio of water vapor and nitrogen Raman-shifted signals. The proportionality factor that converts the signal ratio to water vapor/air mixing ratio is referred to as lidar calibration constant. The calibration constant depends on the water vapor and nitrogen Raman cross sections and on the efficiencies of the respective Raman channels including the photomultiplier tube (PMT) efficiency. Unequal, gradual changes in the PMTs efficiencies due to fatigue effects may lead to gradual alteration of the calibration constant. Such an effect has been observed during the seven- year continuous operation of the RAman Lidar for Moisture Observations (RALMO)¹ . A more detailed research² , has shown that the calibration constant change is more pronounced during summer time probably due to the higher light exposure. Periodical recalibration of the lidar with radiosonde measurements is used to correct the calibration constant. This approach, however, induces additional systematic errors due to the nature of the calibration procedure and the dispersion of the radiosonde parameters. We present a new, instrumental method for automated correction of the calibration constant. By this method, a correction factor is deduced from the ratio of the signals of the two photomultipliers which are illuminated simultaneously by a single, stabilized UV-LED light source. The LED light is delivered to the photomultipliers by a set of additional mirrors and a beam splitter installed inside the grating polychromator used to separate the Raman signals. The correction measurements are taken before midnight. To minimize the data loss, the lidar’s laser is operated during the measurements and a shatter at the polychromator entrance is used to block any atmospheric signals. The use of stabilized light source also allows evaluating the individual photomultipliers aging rates, essential for the instrument maintenance.

Proceedings Article | 26 October 2010 Paper

EARLINET observations of the Eyjafjallajökull ash plume over Europe

Gelsomina Pappalardo, Aldo Amodeo, Albert Ansmann, Arnoud Apituley, Lucas Alados Arboledas, Dimitris Balis, Christine Böckmann, Anatoli Chaikovsky, Adolfo Comeron, Giuseppe D'Amico, Ferdinando De Tomasi, Volker Freudenthaler, Elina Giannakaki, Aldo Giunta, Ivan Grigorov, Ove Gustafsson, Silke Gross, Martial Haeffelin, Marco Iarlori, Stefan Kinne, Holger Linné, Fabio Madonna, Rodanthi Mamouri, Ina Mattis, Michael McAuliffe, Francisco Molero, Lucia Mona, Detlef Müller, Valentin Mitev, Doina Nicolae, Alexandros Papayannis, Maria Rita Perrone, Aleksander Pietruczuk, Manuel Pujadas, Jean-Philippe Putaud, Francois Ravetta, Vincenzo Rizi, Ilya Serikov, Michael Sicard, Valentin Simeonov, Nicola Spinelli, Kerstin Stebel, Thomas Trickl, Ulla Wandinger, Xuan Wang, Frank Wagner, Matthias Wiegner

Proceedings Volume 7832, 78320J (2010) https://doi.org/10.1117/12.869016

KEYWORDS: Aerosols, LIDAR, Atmospheric particles, Raman spectroscopy, Backscatter, Refractive index, Climatology, Physics, Particles, Clouds

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Proceedings Article | 9 October 2009 Paper

Coordinated lidar observations of Saharan dust over Europe in the frame of EARLINET-AS0S project during CALIPSO overpasses: a strong dust case study analysis with modeling support

A. Papayannis, V. Amiridis, L. Mona, R. Mamouri, A. Apituley, L. Alados-Arboledas, D. Balis, A. Chaikovski, F. de Tomasi, I. Grigorov, O. Gustafsson, H. Linnè, I. Mattis, V. Mitev, F. Molero, D. Müller, D. Nicolae, C. Pérez, A. Pietruczuk, J. Putaud, F. Ravetta, V. Rizi, F. Schnell, M. Sicard, V. Simeonov, K. Stebel, T. Trickl, G. D'Amico, G. Pappalardo, X. Wang

Proceedings Volume 7479, 74790C (2009) https://doi.org/10.1117/12.830842

KEYWORDS: Aerosols, LIDAR, Atmospheric modeling, Backscatter, 3D modeling, Raman spectroscopy, Performance modeling, Minerals, Atmospheric particles, Remote sensing

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Proceedings Article | 13 February 2008 Paper

Line-of-sight data transmission system based on mid IR quantum cascade laser

M. Taslakov, V. Simeonov, H. van den Bergh

Proceedings Volume 6877, 68770F (2008) https://doi.org/10.1117/12.763731

KEYWORDS: Quantum cascade lasers, Signal detection, Data transmission, Mid-IR, Aerosols, Frequency modulation, Free space optics, Modulation, Air contamination, Transmitters

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Proceedings Article | 30 October 2007 Paper

A European research infrastructure for the aerosol study on a continental scale: EARLINET-ASOS

Aldo Amodeo, Gelsomina Pappalardo, Jens Bösenberg, Albert Ansmann, Arnoud Apituley, Lucas Alados-Arboledas, Dimitris Balis, Christine Böckmann, Anatoly Chaikovsky, Adolfo Comeron, Volker Freudenthaler, Ove Gustaffson, Georg Hansen, Valentin Mitev, Doina Nicolae, Alexandros Papayannis, Maria Rita Perrone, Aleksander Pietruczuk, Manuel Pujadas, Jean-Philippe Putaud, Francois Ravetta, Vincenzo Rizi, Valentin Simeonov, Nicola Spinelli, Dimitar Stoyanov, Thomas Trickl, Matthias Wiegner

Proceedings Volume 6745, 67450Y (2007) https://doi.org/10.1117/12.738401

KEYWORDS: Aerosols, LIDAR, Data modeling, Raman spectroscopy, Climatology, Backscatter, Databases, Atmospheric modeling, Atmospheric particles, Instrument modeling

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Proceedings Article | 17 October 2007 Paper

EARLINET correlative measurements for CALIPSO

Ina Mattis, Lucia Mona, Detlef Müller, Gelsomina Pappalardo, Lucas Alados-Arboledas, Giuseppe D'Amico, Aldo Amodeo, Arnoud Apituley, José Maria Baldasano, Christine Böckmann, Jens Bösenberg, Anatoli Chaikovsky, Adolfo Comeron, Elina Giannakaki, Ivan Grigorov, Juan Luis Guerrero Rascado, Ove Gustafsson, Marco Iarlori, Holger Linne, Valentin Mitev, Francisco Molero Menendez, Doina Nicolae, Alexandros Papayannis, Carlos Perez Garcia-Pando, Maria Rita Perrone, Aleksander Pietruczuk, Jean-Philippe Putaud, Francois Ravetta, Alejandro Rodríguez, Patric Seifert, Michaël Sicard, Valentin Simeonov, Piotr Sobolewski, Nicola Spinelli, Kerstin Stebel, Andreas Stohl, Matthias Tesche, Thomas Trickl, Xuan Wang, Matthias Wiegner

Proceedings Volume 6750, 67500Z (2007) https://doi.org/10.1117/12.738090

KEYWORDS: LIDAR, Aerosols, Backscatter, Raman spectroscopy, Atmospheric particles, Climatology, Satellites, Clouds, Atmospheric modeling, Data centers

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Proceedings Article | 3 October 2007 Paper

Optimization of lidar data processing: a goal of the EARLINET-ASOS project

Aldo Amodeo, Ina Mattis, Christine Böckmann, Giuseppe D'Amico, Detlef Müller, Lukas Osterloh, Anatoly Chaikovsky, Gelsomina Pappalardo, Albert Ansmann, Arnoud Apituley, Lucas Alados-Arboledas, Dimitris Balis, Adolfo Comeron, Volker Freudenthaler, Valentin Mitev, Doina Nicolae, Alexandros Papayannis, Maria Rita Perrone, Aleksander Pietruczuk, Manuel Pujadas, Jean-Philippe Putaud, Francois Ravetta, Vincenzo Rizi, Valentin Simeonov, Nicola Spinelli, Kersten Stebel, Dimitar Stoyanov, Thomas Trickl, Matthias Wiegner

Proceedings Volume 6750, 67500F (2007) https://doi.org/10.1117/12.738348

KEYWORDS: LIDAR, Aerosols, Data processing, Databases, Backscatter, Raman spectroscopy, Calculus, Signal attenuation, Optical properties, Software development

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Proceedings Article | 5 March 2007 Paper

Open path measurements of ozone, water vapor, CO2, and atmospheric temperature using intrapuls tuning method of quantum cascade laser

M. Taslakov, V. Simeonov, H. van den Bergh

Proceedings Volume 6604, 660423 (2007) https://doi.org/10.1117/12.727145

KEYWORDS: Absorption, Temperature metrology, Quantum cascade lasers, Humidity, Ozone, Carbon monoxide, Gas lasers, Retroreflectors, Mid-IR, Atmospheric modeling

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Proceedings Article | 5 March 2007 Paper

Open path spatially resolved detection of atmospheric compounds using pulsed quantum cascade laser spectroscopy

M. Taslakov, V. Simeonov, H. van den Bergh

Proceedings Volume 6604, 660424 (2007) https://doi.org/10.1117/12.727146

KEYWORDS: Retroreflectors, Quantum cascade lasers, Spatial resolution, Spectroscopy, Signal detection, Atmospheric sensing, Atmospheric modeling, Absorption, Reflectors, Spectroscopic atmospheric monitoring techniques

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Proceedings Article | 20 October 2006 Paper

EARLINET-ASOS: programs and perspectives for the aerosol study on continental scale

Gelsomina Pappalardo, Jens Bösenberg, Aldo Amodeo, Albert Ansmann, Arnoud Apituley, Lucas Alados Arboledas, Dimitris Balis, Christine Böckmann, Anatoly Chaikovsky, Adolfo Comeron, Volker Freudenthaler, Georg Hansen, Valentin Mitev, Doina Nicolae, Alexandros Papayannis, Maria Rita Perrone, Aleksander Pietruczuk, Manuel Pujadas, Jean-Philippe Putaud, Francois Ravetta, Vincenzo Rizi, Valentin Simeonov, Nicola Spinelli, Dimitar Stoyanov, Thomas Trickl, Matthias Wiegner

Proceedings Volume 6367, 636701 (2006) https://doi.org/10.1117/12.690717

KEYWORDS: Aerosols, LIDAR, Data modeling, Environmental sensing, Databases, Raman spectroscopy, Backscatter, Data processing, Climatology, Atmospheric modeling

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Proceedings Article | 3 October 2006 Paper

Meteorological water vapor Raman lidar: advances

T. Dinoev, P. Ristori, Y. Arshinov, S. Bobrovnikov, I. Serikov, B. Calpini, H. van den Bergh, V. Simeonov

Proceedings Volume 6367, 63670C (2006) https://doi.org/10.1117/12.692451

KEYWORDS: LIDAR, Raman spectroscopy, Telescopes, Optical fibers, Nitrogen, Signal to noise ratio, Receivers, Oxygen, Mirrors, Aerosols

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Proceedings Article | 1 November 2005 Paper

Ozone and aerosol distribution above Mexico City measured with a DIAL/elastic lidar system during the Mexico City Metropolitan Area (MCMA) 2003 field campaign

Valentin Simeonov, Pablo Ristori, Marian Taslakov, Todor Dinoev, Luisa Molina, Mario Molina, Hubert van den Bergh

Proceedings Volume 5984, 59840O (2005) https://doi.org/10.1117/12.629429

KEYWORDS: Ozone, Aerosols, LIDAR, Telescopes, Backscatter, Receivers, Signal detection, Pollution, Mass attenuation coefficient, Ultraviolet radiation

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Proceedings Article | 1 November 2005 Paper

Development of a temperature and water vapor Raman lidar for turbulent observations

Pablo Ristori, Martin Froidevaux, Todor Dinoev, Ilya Serikov, Valentin Simeonov, Marc Parlange, Hubert Van den Bergh

Proceedings Volume 5984, 59840F (2005) https://doi.org/10.1117/12.629376

KEYWORDS: LIDAR, Raman spectroscopy, Prisms, Telescopes, Nitrogen, Oxygen, Mirrors, Spatial resolution, Ozone, Optical fibers

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Proceedings Article | 22 April 2005 Paper

Open path trace gas measurements using a pulse quantum cascade laser

Marian Taslakov, Valentin Simeonov, Hubert van den Bergh

Proceedings Volume 5830, (2005) https://doi.org/10.1117/12.618975

KEYWORDS: Ozone, Quantum cascade lasers, Absorption, Spectroscopy, Ultraviolet radiation, Air contamination, Fabry–Perot interferometers, Retroreflectors, Atmospheric turbulence, Laser sources

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Proceedings Article | 22 April 2005 Paper

Quantum cascade laser based system for line-of-sight data transmission in the mid IR

Marian Taslakov, Valentin Simeonov, Hubert van den Bergh

Proceedings Volume 5830, (2005) https://doi.org/10.1117/12.618774

KEYWORDS: Quantum cascade lasers, Data transmission, Signal detection, Mid-IR, Aerosols, Frequency modulation, Air contamination, Amplitude modulation, Transmitters, Mirrors

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Proceedings Article | 16 September 1999 Paper

Raman DIAL measurement of ozone and water vapor in the lower troposphere

Benoit Lazzarotto, Gilles Larcheveque, Philippe Quaglia, Valentin Simeonov, Hubert van den Bergh, Bertrand Calpini

Proceedings Volume 3821, (1999) https://doi.org/10.1117/12.364167

KEYWORDS: Raman spectroscopy, Ozone, LIDAR, Telescopes, Signal detection, Nitrogen, Troposphere, Oxygen, Aerosols, Ultraviolet radiation

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Proceedings Article | 16 September 1999 Paper

UV ozone DIAL based on a Raman cell filled with two Raman active gases

Valentin Simeonov, Benoit Lazzarotto, Gilles Larcheveque, Philippe Quaglia, Bertrand Calpini

Proceedings Volume 3821, (1999) https://doi.org/10.1117/12.364166

KEYWORDS: Raman spectroscopy, Ozone, LIDAR, Gases, Hydrogen, Argon, Mirrors, Ultraviolet radiation, Nd:YAG lasers, Prisms

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Showing 5 of 19 publications

Conference Committee Involvement (7)

Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing

11 September 2018 | Berlin, Germany

Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing

19 September 2011 | Prague, Czech Republic

Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing

20 September 2010 | Toulouse, France

Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing V

31 August 2009 | Berlin, Germany

Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing IV

17 September 2008 | Cardiff, Wales, United Kingdom

Showing 5 of 7 Conference Committees

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