Ultra-high spectral resolution infrared spectrometer for trace gases detection

2010 ◽  
Author(s):  
Zuo-xiao Dai
Keyword(s):  
Spectral Resolution ◽  
Trace Gases ◽  
High Spectral Resolution ◽  
Infrared Spectrometer

scholarly journals Instrumental characteristics and Greenhouse gases measurement capabilities of the Compact High-spectral Resolution Infrared Spectrometer: CHRIS

2019 ◽  
Author(s):  
Marie-Thérèse El Kattar ◽  
Frédérique Auriol ◽  
Hervé Herbin
Keyword(s):  
Greenhouse Gases ◽  
Spectral Resolution ◽  
Complete Information ◽  
High Spectral Resolution ◽  
Gaseous Species ◽  
Future Space ◽  
Infrared Measurements ◽  
Thermal Region ◽  
Portable Spectrometers ◽  
Infrared Spectrometer

Abstract. Ground-based high spectral resolution infrared measurements are an efficient way to obtain accurate tropospheric abundances of different gaseous species and in particular GreenHouse Gases (GHG), such as CO2 and CH4. Many ground-based spectrometers are used in the NDACC and TCCON networks to validate the Level 2 satellite data, but their large dimensions and heavy mass makes them inadequate for field campaigns. To overcome these problems, the use of portable spectrometers was recently investigated. In this context, this paper deals with the CHRIS (Compact High-spectral Resolution Infrared Spectrometer) prototype with unique characteristics such as its high spectral resolution (0.135 cm-1 non-apodized) and its wide spectral range (680 to 5200 cm-1). Its main objective is the characterization of gases and aerosols in the infrared thermal region, that's why it requires high radiometric precision and accuracy, which is achieved by performing spectral and radiometric calibrations that will be presented in this paper. Also, CHRIS's capabilities to retrieve CO2 and CH4 vertical profiles are presented through a complete information content analysis, a channel selection and an error budget estimation in the attempt to join the ongoing campaigns, such as MAGIC, to monitor the GHG and validate the actual and future space missions.

An Experiment Using High Spectral Resolution CrIS Measurements for Atmospheric Trace Gases: Carbon Monoxide Retrieval Impact Study

2014 ◽  
Vol 11 (9) ◽  
pp. 1639-1643 ◽  
Author(s):  
Antonia Gambacorta ◽  
Christopher Barnet ◽  
Walter Wolf ◽  
Thomas King ◽  
Eric Maddy ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Spectral Resolution ◽  
Trace Gases ◽  
High Spectral Resolution ◽  
Impact Study ◽  
Atmospheric Trace Gases

scholarly journals Airborne limb-imaging measurements of temperature, HNO<sub>3</sub>, O<sub>3</sub>, ClONO<sub>2</sub>, H<sub>2</sub>O and CFC-12 during the Arctic winter 2015/16: characterization, in-situ validation and comparison to Aura/MLS

2018 ◽  
Author(s):  
Sören Johansson ◽  
Wolfgang Woiwode ◽  
Michael Höpfner ◽  
Felix Friedl-Vallon ◽  
Anne Kleinert ◽  
...  
Keyword(s):  
Cross Sections ◽  
Spectral Resolution ◽  
Trace Gases ◽  
High Spectral Resolution ◽  
The Arctic ◽  
Trace Gas ◽  
Atmospheric Variability ◽  
Mesoscale Structures ◽  
Research Aircraft

Abstract. The Gimballed Limb Observer for Radiance Imaging of the Atmosphere (GLORIA) was operated on board the German High Altitude and LOng range (HALO) research aircraft during the PGS (POLSTRACC/GW-LCYCLE/SALSA) aircraft campaigns in the Arctic winter 2015/2016. Research flights were conducted from 17 December 2015 until 18 March 2016 between 80° W–30° E longitude and 25° N–87° N latitude. From the GLORIA infrared limb emission measurements, two dimensional cross sections of temperature, HNO3, O3, ClONO2, H2O and CFC-12 are retrieved. During 15 scientific flights of the PGS campaigns the GLORIA instrument measured more than 15 000 atmospheric profiles at high spectral resolution. Dependent on flight altitude and tropospheric cloud cover, the profiles retrieved from the measurements typically range between 5 and 14 km, and vertical resolutions between 400 m and 1000 m are achieved. The estimated total (random and systematic) 1σ errors are in the range of 1 to 2 K for temperature and 10 % to 20 % relative error for the discussed trace gases. Comparisons to in-situ instruments deployed on board HALO have been performed. Over all flights of this campaign the median differences and median absolute deviations between in-situ and GLORIA observations are −0.75 K ± 0.88 K for temperature, −0.03 ppbv ± 0.85 ppbv for HNO3, −3.5 ppbv ± 116.8 ppbv for O3, −15.4 pptv ± 102.8 pptv for ClONO2, −0.13 ppmv ± 0.63 ppmv for H2O and −19.8 pptv ± 46.9 pptv for CFC-12. These differences are mainly within the expected performances of the cross-compared instruments. Events with stronger deviations are explained by atmospheric variability and different sampling characteristics of the instruments. Additionally comparisons of GLORIA HNO3 and O3 with measurements of the Aura Microwave Limb Sounder (MLS) instrument show highly consistent structures in trace gas distributions and illustrate the potential of the high spectral resolution limb-imaging GLORIA observations for resolving narrow mesoscale structures in the UTLS.

scholarly journals Instrumental characteristics and potential greenhouse gas measurement capabilities of the Compact High-Spectral-Resolution Infrared Spectrometer: CHRIS

2020 ◽  
Vol 13 (7) ◽  
pp. 3769-3786
Author(s):  
Marie-Thérèse El Kattar ◽  
Frédérique Auriol ◽  
Hervé Herbin
Keyword(s):  
Greenhouse Gases ◽  
Spectral Resolution ◽  
Complete Information ◽  
Atmospheric Composition ◽  
High Spectral Resolution ◽  
Gaseous Species ◽  
Infrared Measurements ◽  
Gas Measurement ◽  
Portable Spectrometers ◽  
Infrared Spectrometer

Abstract. Ground-based high-spectral-resolution infrared measurements are an efficient way to obtain accurate tropospheric abundances of different gaseous species, in particular greenhouse gases (GHGs) such as CO2 and CH4. Many ground-based spectrometers are used in the NDACC and TCCON networks to validate the Level 2 satellite data, but their large dimensions and heavy mass make them inadequate for field campaigns. To overcome these problems, the use of portable spectrometers was recently investigated. In this context, this paper deals with the CHRIS (Compact High-Spectral-Resolution Infrared Spectrometer) prototype with unique characteristics such as its high spectral resolution (0.135 cm−1 nonapodized) and its wide spectral range (680 to 5200 cm−1). Its main objective is the characterization of gases and aerosols in the thermal and shortwave infrared regions. That is why it requires high radiometric precision and accuracy, which are achieved by performing spectral and radiometric calibrations that are described in this paper. Furthermore, CHRIS's capabilities to retrieve vertical CO2 and CH4 profiles are presented through a complete information content analysis, a channel selection and an error budget estimation in the attempt to join ongoing campaigns such as MAGIC (Monitoring of Atmospheric composition and Greenhouse gases through multi-Instruments Campaigns) to monitor GHGs and validate the actual and future space missions such as IASI-NG and Microcarb.

Ground-based atmospheric measurements from CHRIS for satellite validation.

2020 ◽  
Author(s):  
El Kattar Marie-Thérèse ◽  
Auriol Frédérique ◽  
Herbin Hervé
Keyword(s):  
Greenhouse Gases ◽  
Spectral Resolution ◽  
Trace Gases ◽  
Space Missions ◽  
High Spectral Resolution ◽  
Radiative Transfer Model ◽  
Transfer Model ◽  
Atmospheric Measurements ◽  
Gaseous Species ◽  
Infrared Measurements

&lt;p&gt;Ground-based high spectral resolution infrared measurements are considered to be the most efficient way to obtain accurate tropospheric abundances of different gaseous species and in particular greenhouse gases, such as CO&lt;sub&gt;2&lt;/sub&gt; and CH&lt;sub&gt;4&lt;/sub&gt;. Furthermore, this type of measurement is also commonly used to validate the satellite retrievals. Despite the outstanding capabilities of the spectrometers used by the TCCON and NDACC networks, they are inadequate for field campaigns; therefore, more compact and stable spectrometers have been developed. &lt;strong&gt;CHRIS&lt;/strong&gt; (&lt;strong&gt;C&lt;/strong&gt;ompact &lt;strong&gt;H&lt;/strong&gt;igh &lt;strong&gt;S&lt;/strong&gt;pectral &lt;strong&gt;R&lt;/strong&gt;esolution &lt;strong&gt;I&lt;/strong&gt;nfrared &lt;strong&gt;S&lt;/strong&gt;pectrometer) is a new prototype based on the EM27-SUN from Bruker, with unique characteristics such as its high spectral resolution (0.135 cm&lt;sup&gt;-1&lt;/sup&gt; non-apodized) with a spectral sampling every 0.065 cm&lt;sup&gt;-1&lt;/sup&gt; to satisfy the Nyquist criterion. This optically stable instrument allows recording solar transmission light spectra in a wide spectral range (680 to 5200 cm&lt;sup&gt;-1&lt;/sup&gt;) with a relatively high SNR (~780 in average).&lt;/p&gt;&lt;p&gt;&amp;#160;&lt;/p&gt;&lt;p&gt;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160; This instrumental prototype is designed to perform measurements of greenhouse gases (CO&lt;sub&gt;2&lt;/sub&gt;, CH&lt;sub&gt;4&lt;/sub&gt; and H&lt;sub&gt;2&lt;/sub&gt;O), trace gases (SO&lt;sub&gt;2&lt;/sub&gt;, CO, HCl, NO&lt;sub&gt;x&lt;/sub&gt;&amp;#8230;) but also aerosols and clouds that have very typical spectral features in particular in the thermal infrared region. The main objective of this study is the accurate retrieval of tropospheric abundances of the greenhouse gases, CO&lt;sub&gt;2&lt;/sub&gt; and CH&lt;sub&gt;4&lt;/sub&gt;, in the TIR/SWIR regions, and study the synergy between them especially for the MAGIC campaign. CHRIS is a part of this ongoing campaign in an attempt to monitor the GHG and validate the actual space missions like IASI, OCO-2, GOSAT-2 and future space missions like Merlin, MicroCarb and IASI-NG.&lt;/p&gt;&lt;p&gt;&amp;#160;&lt;/p&gt;&lt;p&gt;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160; Here, the spectral and radiometric characterization of this instrument is briefly explained. Furthermore, we present CHRIS&amp;#8217;s capabilities to measure CO&lt;sub&gt;2&lt;/sub&gt; and CH&lt;sub&gt;4&lt;/sub&gt; vertical profiles through a complete information content analysis, a channel selection and an error budget estimation. The preliminary results of the retrieval of these gases using the radiative transfer model ARAHMIS developed at the LOA is also presented. CHRIS is also part of other campaigns such as ImagEtna and Shadow-2 to study the trace gases and aerosols respectively.&lt;/p&gt;

High-Spectral- and High-Temporal-Resolution Infrared Measurements from Geostationary Orbit

2009 ◽  
Vol 26 (11) ◽  
pp. 2273-2292 ◽  
Author(s):  
Timothy J. Schmit ◽  
Jun Li ◽  
Steven A. Ackerman ◽  
James J. Gurka
Keyword(s):  
Temporal Resolution ◽  
Spectral Resolution ◽  
Weather Prediction ◽  
Trace Gases ◽  
Geostationary Orbit ◽  
Resolving Power ◽  
High Spectral Resolution ◽  
High Temporal Resolution ◽  
Vertical Resolution ◽  
Infrared Measurements

Abstract The first of the next-generation series of the Geostationary Operational Environmental Satellite (GOES-R) is scheduled for launch in 2015. The new series of GOES will not have an infrared (IR) sounder dedicated to acquiring high-vertical-resolution atmospheric temperature and humidity profiles. High-spectral-resolution sensors have a much greater vertical-resolving power of temperature, moisture, and trace gases than low-spectral-resolution sensors. Because of coarse vertical resolution and limited accuracy in the legacy sounding products from the current GOES sounders, placing a high-spectral-resolution IR sounder with high temporal resolution in the geostationary orbit can provide nearly time-continuous three-dimensional moisture and wind profiles. This would allow substantial improvements in monitoring the mesoscale environment for severe weather forecasting and other applications. Application areas include nowcasting (and short-term forecasts) and numerical weather prediction, which require products such as atmospheric moisture and temperature profiles as well as derived parameters, clear-sky radiances, vertical profiles of atmospheric motion vectors, sea surface temperature, cloud-top properties, and surface properties. Other application areas include trace gases/air quality, dust detection and characterization, climate, and calibration. This paper provides new analysis that further documents the available information regarding the anticipated improvements and their benefits.

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