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Atmospheric-pressure Molecular Imaging of Biological Tissues and Biofilms by LAESI Mass Spectrometry

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Bistatic imaging lidar technique for upper atmospheric studies.

B M Welsh, C S Gardner

|June 16, 2010

Summary

Bistatic imaging lidar measures atmospheric layer density by imaging a laser-illuminated spot. This technique offers a new method for profiling atmospheric density with quantifiable vertical resolution.

Area of Science:

Atmospheric physics and remote sensing.
Optical instrumentation and techniques.

Background:

Traditional monostatic lidar techniques have limitations in profiling certain atmospheric layers.
Accurate measurement of vertical density profiles in atmospheric layers, like the mesospheric sodium layer, is crucial for atmospheric research.

Purpose of the Study:

To introduce and theoretically analyze the bistatic imaging lidar technique.
To demonstrate the feasibility and basic performance of this novel lidar approach for atmospheric density profiling.

Main Methods:

Utilizing a bistatic lidar configuration where a laser illuminates a target spot and a telescope images it.
Analyzing image profiles to extract information on atmospheric layer vertical structure and laser beam characteristics.
Interpreting the imaging process as a linear filter relating layer density to the observed signal.

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Main Results:

The vertical density of atmospheric layers can be measured by imaging an illuminated spot.
Theoretical vertical resolution is quantifiable and dependent on laser beamwidth and lidar geometry.
Experimental data validate the feasibility and performance of the bistatic imaging lidar technique.

Conclusions:

Bistatic imaging lidar is a fundamentally different and viable technique for atmospheric density profiling.
The method provides quantifiable vertical resolution, enhancing atmospheric remote sensing capabilities.
This technique offers a promising alternative for studying atmospheric phenomena like the mesospheric sodium layer.