2-µm hybrid laser emitter for future carbon dioxide space-borne lidar measurement

In this paper, we investigate an innovative application of Light Detection and Ranging (LIDAR) technology for the aviation-related pollutant measurements. The proposed measurement technique is conceived for high-resolution characterisation in space and time domains of aviation-related pollutant gases. The system performs Integral Path Differential Absorption (IPDA) measurement in a bistatic LIDAR measurement setup. The airborne component consists of a tuneable Near Infrared (NIR) laser emitter installed on an Unmanned Aircraft (UA) and the ground subsystem is composed by a target reference surface (calibrated for reflectance) and a differential transmittance measuring device based on a NIR Camera calibrated for radiance. The specific system implementation for Carbon Dioxide (CO2) measurement is discussed. A preliminary assessment of the error figures associated with the proposed system layout is performed.

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Early detection of volcanic hazard by lidar measurement of carbon dioxide

Natural Hazards ◽

10.1007/s11069-016-2209-0 ◽

2016 ◽

Vol 83 (S1) ◽

pp. 21-29 ◽

Cited By ~ 4

Author(s):

Luca Fiorani ◽

Simone Santoro ◽

Stefano Parracino ◽

Giovanni Maio ◽

Marcello Nuvoli ◽

...

Keyword(s):

Carbon Dioxide ◽

Early Detection ◽

Volcanic Hazard ◽

Lidar Measurement

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Development of a laser for differential absorption lidar measurement of atmospheric carbon dioxide

10.1117/12.2068023 ◽

2014 ◽

Cited By ~ 4

Author(s):

Iain Robinson ◽

James W. Jack ◽

Cameron F. Rae ◽

John B. Moncrieff

Keyword(s):

Carbon Dioxide ◽

Atmospheric Carbon Dioxide ◽

Lidar Measurement ◽

Differential Absorption ◽

Differential Absorption Lidar ◽

Atmospheric Carbon

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Validation of double-pulse 1572 nm integrated path differential absorption lidar measurement of carbon dioxide

EPJ Web of Conferences ◽

10.1051/epjconf/201817601031 ◽

2018 ◽

Vol 176 ◽

pp. 01031 ◽

Cited By ~ 1

Author(s):

Juan Du ◽

Jiqiao Liu ◽

Decang Bi ◽

Xiuhua Ma ◽

Xia Hou ◽

...

Keyword(s):

Carbon Dioxide ◽

Standard Error ◽

Double Pulse ◽

Concentration Measurement ◽

The Other ◽

Lidar Measurement ◽

Differential Absorption ◽

Echo Signal ◽

Differential Absorption Lidar

A ground-based double-pulse 1572 nm integrated path differential absorption (IPDA) lidar was developed for carbon dioxide (CO2) column concentrations measurement. The lidar measured the CO2 concentrations continuously by receiving the scattered echo signal from a building about 1300 m away. The other two instruments of TDLAS and in-situ CO2 analyzer measured the CO2 concentrations on the same time. A CO2 concentration measurement of 430 ppm with 1.637 ppm standard error was achieved.

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Electron Cytochemical Study of Carbon Dioxide Laser Effect on Rhesus Monkey Cornea

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010005113x ◽

1974 ◽

Vol 32 ◽

pp. 224-225

Author(s):

K. C. Tsou ◽

J. Morris ◽

P. Shawaluk ◽

B. Stuck ◽

E. Beatrice

Keyword(s):

Carbon Dioxide ◽

Electron Microscope ◽

Rhesus Monkey ◽

Carbon Dioxide Laser ◽

Cytochemical Study ◽

Laser Effect

While much is known regarding the effect of lasers on the retina, little study has been done on the effect of lasers on cornea, because of the limitation of the size of the material. Using a combination of electron microscope and several newly developed cytochemical methods, the effect of laser can now be studied on eye for the purpose of correlating functional and morphological damage. The present paper illustrates such study with CO2 laser on Rhesus monkey.

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The Critical Point Drying Method Applied to Scanning Electron Microscopy of L-929 Cells

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100068382 ◽

1970 ◽

Vol 28 ◽

pp. 278-279

Author(s):

Charles TurnbiLL ◽

Delbert E. Philpott

Keyword(s):

Electron Microscopy ◽

Carbon Dioxide ◽

Surface Tension ◽

Critical Point ◽

Freeze Drying ◽

Attractive Alternative ◽

Crystal Formation ◽

Critical Point Drying ◽

Time Required ◽

Scanning Electron

The advent of the scanning electron microscope (SCEM) has renewed interest in preparing specimens by avoiding the forces of surface tension. The present method of freeze drying by Boyde and Barger (1969) and Small and Marszalek (1969) does prevent surface tension but ice crystal formation and time required for pumping out the specimen to dryness has discouraged us. We believe an attractive alternative to freeze drying is the critical point method originated by Anderson (1951; for electron microscopy. He avoided surface tension effects during drying by first exchanging the specimen water with alcohol, amy L acetate and then with carbon dioxide. He then selected a specific temperature (36.5°C) and pressure (72 Atm.) at which carbon dioxide would pass from the liquid to the gaseous phase without the effect of surface tension This combination of temperature and, pressure is known as the "critical point" of the Liquid.

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