A New Laser Based Approach for Measuring Atmospheric Greenhouse Gases
In 2012, we developed a proof-of-concept system for a new open-path laser absorption spectrometer concept for measuring atmospheric CO2. The measurement approach utilizes high-reliability all-fiber-based, continuous-wave laser technology, along with a unique all-digital lock-in amplifier method that...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2013-11-01
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| Series: | Remote Sensing |
| Subjects: | |
| Online Access: | http://www.mdpi.com/2072-4292/5/12/6284 |
| _version_ | 1798025904612442112 |
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| author | Jeremy Dobler Michael Braun Nathan Blume T. Scott Zaccheo |
| author_facet | Jeremy Dobler Michael Braun Nathan Blume T. Scott Zaccheo |
| author_sort | Jeremy Dobler |
| collection | DOAJ |
| description | In 2012, we developed a proof-of-concept system for a new open-path laser absorption spectrometer concept for measuring atmospheric CO2. The measurement approach utilizes high-reliability all-fiber-based, continuous-wave laser technology, along with a unique all-digital lock-in amplifier method that, together, enables simultaneous transmission and reception of multiple fixed wavelengths of light. This new technique, which utilizes very little transmitted energy relative to conventional lidar systems, provides high signal-to-noise (SNR) measurements, even in the presence of a large background signal. This proof-of-concept system, tested in both a laboratory environment and a limited number of field experiments over path lengths of 680 m and 1,600 m, demonstrated SNR values >1,000 for received signals of ~18 picoWatts averaged over 60 s. A SNR of 1,000 is equivalent to a measurement precision of ±0.001 or ~0.4 ppmv. The measurement method is expected to provide new capability for automated monitoring of greenhouse gas at fixed sites, such as carbon sequestration facilities, volcanoes, the short- and long-term assessment of urban plumes, and other similar applications. In addition, this concept enables active measurements of column amounts from a geosynchronous orbit for a network of ground-based receivers/stations that would complement other current and planned space-based measurement capabilities. |
| first_indexed | 2024-04-11T18:27:36Z |
| format | Article |
| id | doaj.art-5d6b1d580cad46f3b01bc66170bbac2e |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-04-11T18:27:36Z |
| publishDate | 2013-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-5d6b1d580cad46f3b01bc66170bbac2e2022-12-22T04:09:35ZengMDPI AGRemote Sensing2072-42922013-11-015126284630410.3390/rs5126284rs5126284A New Laser Based Approach for Measuring Atmospheric Greenhouse GasesJeremy Dobler0Michael Braun1Nathan Blume2T. Scott Zaccheo3Exelis Geospatial Systems, 1919 Cook Rd., Fort Wayne, IN 46818, USAExelis Geospatial Systems, 1919 Cook Rd., Fort Wayne, IN 46818, USAExelis Geospatial Systems, 1919 Cook Rd., Fort Wayne, IN 46818, USAAtmospheric and Environmental Research, Lexington, MA 02421, USAIn 2012, we developed a proof-of-concept system for a new open-path laser absorption spectrometer concept for measuring atmospheric CO2. The measurement approach utilizes high-reliability all-fiber-based, continuous-wave laser technology, along with a unique all-digital lock-in amplifier method that, together, enables simultaneous transmission and reception of multiple fixed wavelengths of light. This new technique, which utilizes very little transmitted energy relative to conventional lidar systems, provides high signal-to-noise (SNR) measurements, even in the presence of a large background signal. This proof-of-concept system, tested in both a laboratory environment and a limited number of field experiments over path lengths of 680 m and 1,600 m, demonstrated SNR values >1,000 for received signals of ~18 picoWatts averaged over 60 s. A SNR of 1,000 is equivalent to a measurement precision of ±0.001 or ~0.4 ppmv. The measurement method is expected to provide new capability for automated monitoring of greenhouse gas at fixed sites, such as carbon sequestration facilities, volcanoes, the short- and long-term assessment of urban plumes, and other similar applications. In addition, this concept enables active measurements of column amounts from a geosynchronous orbit for a network of ground-based receivers/stations that would complement other current and planned space-based measurement capabilities.http://www.mdpi.com/2072-4292/5/12/6284lidargreenhouse gaslaser absorption spectroscopy |
| spellingShingle | Jeremy Dobler Michael Braun Nathan Blume T. Scott Zaccheo A New Laser Based Approach for Measuring Atmospheric Greenhouse Gases Remote Sensing lidar greenhouse gas laser absorption spectroscopy |
| title | A New Laser Based Approach for Measuring Atmospheric Greenhouse Gases |
| title_full | A New Laser Based Approach for Measuring Atmospheric Greenhouse Gases |
| title_fullStr | A New Laser Based Approach for Measuring Atmospheric Greenhouse Gases |
| title_full_unstemmed | A New Laser Based Approach for Measuring Atmospheric Greenhouse Gases |
| title_short | A New Laser Based Approach for Measuring Atmospheric Greenhouse Gases |
| title_sort | new laser based approach for measuring atmospheric greenhouse gases |
| topic | lidar greenhouse gas laser absorption spectroscopy |
| url | http://www.mdpi.com/2072-4292/5/12/6284 |
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