Absolute Detection of Atmospheric Temperature by Using a Scanning Fabry-Perot Interferometer in High Spectral Resolution Lidar

This paper describes the modifications done on the University of Wisconsin-Madison High Spectral Resolution Lidar (HSRL) that improved the instrument’s performance. The University of Wisconsin HSRL lidars designed by our group at the Space Science and Engineering Center were deployed in numerous field campaigns in various locations around the world. Over the years the instruments have undergone multiple modifications that improved the performance and added new measurement capabilities such as atmospheric temperature profile and extinction cross-section measurements.

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Advances in atmospheric temperature profile measurements using high spectral resolution lidar

EPJ Web of Conferences ◽

10.1051/epjconf/201817601023 ◽

2018 ◽

Vol 176 ◽

pp. 01023

Author(s):

Ilya I. Razenkov ◽

Edwin W. Eloranta

Keyword(s):

Temperature Profile ◽

Spectral Resolution ◽

Atmospheric Temperature ◽

High Spectral Resolution ◽

Absolute Calibration ◽

Temperature Sensitive ◽

Backscatter Coefficient ◽

Rayleigh Backscattering ◽

Atmospheric Temperature Profile ◽

High Spectral Resolution Lidar

This paper reports the atmospheric temperature profile measurements using a University of Wisconsin-Madison High Spectral Resolution Lidar (HSRL) and describes improvements in the instrument performance. HSRL discriminates between Mie and Rayleigh backscattering [1]. Thermal motion of molecules broadens the spectrum of the transmitted laser light due to Doppler effect. The HSRL exploits this property to allow the absolute calibration of the lidar and measurements of the aerosol volume backscatter coefficient. Two iodine absorption filters with different line widths are used to resolve temperature sensitive changes in Rayleigh backscattering for atmospheric temperature profile measurements.

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Atmospheric Temperature Profile Measurements Using Mobile High Spectral Resolution Lidar

EPJ Web of Conferences ◽

10.1051/epjconf/201611906007 ◽

2016 ◽

Vol 119 ◽

pp. 06007

Author(s):

Ilya I. Razenkov ◽

Edwin W. Eloranta

Keyword(s):

Temperature Profile ◽

Spectral Resolution ◽

Atmospheric Temperature ◽

High Spectral Resolution ◽

Atmospheric Temperature Profile ◽

High Spectral Resolution Lidar

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High spectral resolution lidar using spherical Fabry-Perot to measure aerosol and atmospheric molecular density

EPJ Web of Conferences ◽

10.1051/epjconf/201817601016 ◽

2018 ◽

Vol 176 ◽

pp. 01016

Author(s):

Caraty Yann ◽

Hauchecorne Alain ◽

Keckhut Philippe ◽

Mariscal Jean-François ◽

Dalmeida Eric

Keyword(s):

Spectral Resolution ◽

High Spectral Resolution ◽

Temperature Profiles ◽

Thermal Drift ◽

Molecular Density ◽

Fabry Perot ◽

Validity Range ◽

Optical Alignment ◽

Rayleigh Lidar ◽

High Spectral Resolution Lidar

In theory, the HSRL method should expand the validity range of the atmospheric molecular density and temperature profiles of the Rayleigh LIDAR in the UTLS below 30 km, with an accuracy of 1 K, while suppressing the particle contribution. We tested a Spherical Fabry-Perot which achieves these performances while keeping a big flexibility in optical alignment. However, this device has some limitations (thermal drift and a possible partial depolarisation of the backscattered signal).

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