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Proceedings Paper • Open Access

Development and evaluation of a high sensitivity dial system for profiling atmospheric CO2

Paper Abstract

A ground-based 2-micron Differential Absorption Lidar (DIAL) CO2 profiling system for atmospheric boundary layer studies and validation of space-based CO2 sensors is being developed and tested at NASA Langley Research Center as part of the NASA Instrument Incubator Program. To capture the variability of CO2 in the lower troposphere a precision of 1-2 ppm of CO2 ( <0.5%) with 0.5 to 1 km vertical resolution from near surface to free troposphere (4-5 km) is one of the goals of this program. In addition, a 1% (3 ppm) absolute accuracy with a 1 km resolution over 0.5 km to free troposphere (4-5 km) is also a goal of the program. This DIAL system leverages 2-micron laser technology developed under NASA’s Laser Risk Reduction Program (LRRP) and other NASA programs to develop new solid-state laser technology that provides high pulse energy, tunable, wavelength-stabilized, and double-pulsed lasers that are operable over pre-selected temperature insensitive strong CO2 absorption lines suitable for profiling of lower tropospheric CO2. It also incorporates new high quantum efficiency, high gain, and relatively low noise phototransistors, and a new receiver/signal processor system to achieve high precision DIAL measurements. This presentation describes the capabilities of this system for atmospheric CO2 and aerosol profiling. Examples of atmospheric measurements in the lidar and DIAL mode will be presented.

Paper Details

Date Published: 21 November 2017
PDF: 2 pages
Proc. SPIE 10566, International Conference on Space Optics — ICSO 2008, 105661I (21 November 2017); doi: 10.1117/12.2308246
Show Author Affiliations
S. Ismail, NASA Langley Research Ctr. (United States)
G. J. Koch, NASA Langley Research Ctr. (United States)
T. Refaat, NASA Langley Research Ctr. (United States)
M. N. Abedin, NASA Langley Research Ctr. (United States)
J. Yu, NASA Langley Research Ctr. (United States)
U. N. Singh, NASA Langley Research Ctr. (United States)


Published in SPIE Proceedings Vol. 10566:
International Conference on Space Optics — ICSO 2008
Josiane Costeraste; Errico Armandillo; Nikos Karafolas, Editor(s)

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