Miniaturized laser heterodyne radiometer for measurements of CO2 in the atmospheric column

被引：65

作者：

Wilson, E. L. ^{[1
]}

McLinden, M. L. ^{[2
]}

Miller, J. H. ^{[3
]}

Allan, G. R. ^{[1
,4
]}

Ott, L. E. ^{[5
]}

Melroy, H. R. ^{[1
,3
]}

Clarke, G. B. ^{[1
,6
]}

机构：

[1] NASA, Goddard Space Flight Ctr, Laser Remote Sensing Lab, Greenbelt, MD 20771 USA

[2] NASA, Goddard Space Flight Ctr, Microwave Instrument & Technol Branch, Greenbelt, MD 20771 USA

[3] George Washington Univ, Dept Chem, Washington, DC 20052 USA

[4] Sigma Space Corp, Lanham, MD 20706 USA

[5] NASA, Goddard Space Flight Ctr, Global Modeling & Assimilat Off, Greenbelt, MD 20771 USA

[6] Amer Univ, Washington, DC 20016 USA

来源：

APPLIED PHYSICS B-LASERS AND OPTICS | 2014年 / 114卷 / 03期

关键词：

INSTRUMENT; SENSITIVITY;

D O I：

10.1007/s00340-013-5531-1

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We have developed a low-cost, miniaturized laser heterodyne radiometer for highly sensitive measurements of carbon dioxide (CO2) in the atmospheric column. In this passive design, sunlight that has undergone absorption by CO2 in the atmosphere is collected and mixed with continuous wave laser light that is step-scanned across the absorption feature centered at 1,573.6 nm. The resulting radio frequency beat signal is collected as a function of laser wavelength, from which the total column mole fraction can be de-convolved. We are expanding this technique to include methane (CH4) and carbon monoxide (CO), and with minor modifications, this technique can be expanded to include species such as water vapor (H2O) and nitrous oxide (N2O).

引用

页码：385 / 393

页数：9

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