Tell a friend
Print
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.
![[img]](https://elib.dlr.de/style/images/fileicons/application_pdf.png)
|
PDF
466kB |
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/ | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Document Type: | Article | ||||||||||||
| Title: | ALIS: An efficient method to compute high spectral resolution polarized solar radiances using the Monte Carlo approach | ||||||||||||
| Authors: |
| ||||||||||||
| 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 |
Repository Staff Only: item control page
