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Emde, Claudia and Buras, Robert and Mayer, Bernhard (2011) ALIS: An efficient method to compute high spectral resolution polarized solar radiances using the Monte Carlo approach. Journal of Quantitative Spectroscopy and Radiative Transfer, 112, pp. 1622-1631. Elsevier. doi: 10.1016/j.jqsrt.2011.03.018.
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Official URL: http://www.sciencedirect.com/science/journal/00224073/112/10
Abstract
An efficientmethodtocomputeaccuratepolarizedsolarradiancespectrausingthe(3D) MonteCarlomodelMYSTIChasbeendeveloped.Suchhighresolutionspectraare measuredbyvarioussatelliteinstrumentsforremotesensingofatmospherictrace gases.ALIS(AbsorptionLinesImportanceSampling)allowsthecalculationofspectraby tracingphotonsatonlyonewavelength.Inordertotakeintoaccountthespectral dependenceoftheabsorptioncoefficientaspectralabsorptionweightiscalculatedfor each photonpath.Ateachscatteringeventthelocalestimatemethodiscombinedwith an importancesamplingmethodtotakeintoaccountthespectraldependenceofthe scatteringcoefficient.Sinceeachwavelengthgridpointiscomputedbasedonthesame set ofrandomphotonpaths,thestatisticalerrorisalmostsameforallwavelengthsand hencethesimulatedspectrumisnotnoisy.Thestatisticalerrormainlyresultsinasmall relativedeviationwhichisindependentofwavelengthandcanbeneglectedforthose remotesensingapplications,wheredifferentialabsorptionfeaturesareofinterest. Two exampleapplicationsarepresented:Thesimulationofshortwave-infrared polarizedspectraasmeasuredbyGOSATfromwhichCO2 is retrieved,andthe simulationofthedifferentialopticalthicknessinthevisiblespectralrangewhichis derivedfromSCIAMACHYmeasurementstoretrieveNO2. Thecomputationalspeedof ALIS (for1Dor3Datmospheres)isoftheorderoforevenfasterthanthatofone- dimensionaldiscreteordinatemethods,inparticularwhenpolarizationisconsidered.
| Item URL in elib: | https://elib.dlr.de/72970/ | ||||||||||||||||
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| Document Type: | Article | ||||||||||||||||
| Title: | ALIS: An efficient method to compute high spectral resolution polarized solar radiances using the Monte Carlo approach | ||||||||||||||||
| Authors: |
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| Date: | 2011 | ||||||||||||||||
| Journal or Publication Title: | Journal of Quantitative Spectroscopy and Radiative Transfer | ||||||||||||||||
| Refereed publication: | Yes | ||||||||||||||||
| Open Access: | Yes | ||||||||||||||||
| Gold Open Access: | No | ||||||||||||||||
| In SCOPUS: | Yes | ||||||||||||||||
| In ISI Web of Science: | Yes | ||||||||||||||||
| Volume: | 112 | ||||||||||||||||
| DOI: | 10.1016/j.jqsrt.2011.03.018 | ||||||||||||||||
| Page Range: | pp. 1622-1631 | ||||||||||||||||
| Publisher: | Elsevier | ||||||||||||||||
| Status: | Published | ||||||||||||||||
| Keywords: | Radiative transfer; Monte Carlomethod; Polarization; Trace gas remotesensing; High spectralresolution | ||||||||||||||||
| HGF - Research field: | Aeronautics, Space and Transport | ||||||||||||||||
| HGF - Program: | Space, Aeronautics, Transport | ||||||||||||||||
| HGF - Program Themes: | Earth Observation, ATM and Operation (old), Transport System | ||||||||||||||||
| DLR - Research area: | Raumfahrt, Aeronautics, Transport | ||||||||||||||||
| DLR - Program: | R EO - Earth Observation, L AO - Air Traffic Management and Operation, V VS - Verkehrssystem | ||||||||||||||||
| DLR - Research theme (Project): | R - Atmospheric and climate research, L - Climate, Weather and Environment (old), V - Verkehrsentwicklung und Umwelt (old) | ||||||||||||||||
| Location: | Oberpfaffenhofen | ||||||||||||||||
| Institutes and Institutions: | Institute of Atmospheric Physics > Atmospheric Remote Sensing | ||||||||||||||||
| Deposited By: | Freund, Jana | ||||||||||||||||
| Deposited On: | 15 Dec 2011 13:19 | ||||||||||||||||
| Last Modified: | 06 Sep 2019 15:28 |
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