Physikalisch-Meteorologisches Observatorium Davos, World Radiation Center (PMOD/WRC)

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Physikalisch-Meteorologisches Observatorium Davos, World Radiation Center (PMOD/WRC). The PMOD/WRC is the World Radiation Center of the World Meteorological Organisation,. And is signatory of the Mutual Recognition Arrangement by the Committee of Weights and Measures (CIPM MRA). PMOD/WRC. - PowerPoint PPT Presentation

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<ul><li><p>Physikalisch-Meteorologisches Observatorium Davos, World Radiation Center (PMOD/WRC)And is signatory of the Mutual Recognition Arrangement by the Committee of Weights and Measures (CIPM MRA).The PMOD/WRC is the World Radiation Center of the World Meteorological Organisation,</p></li><li><p>PMOD/WRCPMOD/WRCAbsolute radiometry (ARS)Infrared radiometry (IRS)Optical depth WORCCUV radiometry (WCC-UV)World Radiation Center</p></li><li><p>EMRP-ENV03 Solar UVhttp://projects.pmodwrc.ch/env03/Enhance the reliability of spectral solar UV radiation measured at the Earth surfaceDevelop new techniques and devices for traceability better than 2% (now 5%) and for cost-effective array-spectroradiometer in UV monitoring networks Intercomparison Campaigns and WorkshopsPrimary Irradiance StandardTransfer StandardReference SpectroradiometerEnd-User DevicesCalibrated UV NetworkProject Coordination: Julian Grbner, Davos Duration: 2011 - 2014Total Budget: 3.9 M8 Partners EU-NMI; 2 Industry; 2 Universities; &gt; 3 Collaborators (Stakeholders)</p></li><li><p>Cryogenic radiometer 0.01%Spectral irradiance standard ~1-3%</p><p>cw-Laser Sources </p><p>Si-trap detector + apertureFilter Radiometer Blackbody + aperture ~0.3% DetectorSourceSpectroradiometer</p><p>Spectrally tuneable source </p><p>Spectroradiometer ~5%Traceability chain for spectral irradiance Wm-2nm-1Portable transfer standard (used for stability check) ~4%Grbner &amp; Sperfeld, Metrologia, 2006</p></li><li><p>Validation of the QASUME irradiance reference at PTBBlackbody BB3200pg at PTBGrbner J., and P. Sperfeld, Direct traceability of the portable QASUME irradiance scale to the primary irradiance standard of the PTB, Metrologia, 42, 134139, 2005.QASUME Validation at PTB in 2004 and 2013</p></li><li><p>Quality site audit with the QASUME reference spectroradiometerUV Quality Assurance ProgramStatus 2002 - 201363 site visits34 sites&gt;150 spectroradiometer intercomparisonshttp://www.pmodwrc.ch/euvc/euvc.php?topic=qasume_auditNy lesund, Spitzbergen, 2009QASUMEGrbner et al., Appl. Opt. 2005Grbner et al., Metrologia, 2006</p></li><li><p>RBCC-E @ El ArenosilloThe sunny place1999, 2005, 2007, 2009, 2011, 20132005</p></li><li><p>Daily ratios to QASUME: The ideal case</p></li><li><p>Brewer cosine error</p></li><li><p>Brewer cosine error</p></li><li><p>Single Brewer Stray light</p></li><li><p>Brewer Temperature dependency6%</p></li><li><p>Summary from 6th RBCC-E (2011)</p></li><li><p>Wavelength scale</p></li><li><p>What needs to be addressed?Temperature dependencyAbsolute calibrationWavelength dispersionSingle Brewer Stray LightAngular ResponseApply Correction, or better:Entrance optic modification</p></li><li><p>Presentations, Guidelines, Publications can be found at the project web-site:http://projects.pmodwrc.ch/env03/Spectral solar UV Intercomparison at Davos &amp; Final ENV03 Workshop, 7-16 July 2014International Pyrheliometer Comparison (IPC) 2010</p></li><li><p>Quality site audit with the QASUME reference spectroradiometerUV Quality Assurance ProgramStatus 2002 - 201363 site visits34 sites&gt;150 spectroradiometer intercomparisonshttp://www.pmodwrc.ch/euvc/euvc.php?topic=qasume_audit</p></li><li><p>QASUME irradiance reference stability: 2004 to 2012</p></li><li><p>QASUME irradiance referenceBased on 7 transfer standards directly calibrated against the primary irradiance normal of the Physikalisch-Technische Bundesanstalt (PTB), in Germany.Transfer standard1000 W FEL lampTransfer standard1000 W FEL lampTransfer standard1000 W FEL lampPTBEUVC/QASUME250 W portable lamp250 W portable lamp250 W portable lampPortable QASUME irradiance reference</p></li><li><p>Spectral UV irradiance site audit procedurePMOD/WRCSpectroradiometer Brewer#163Portable QASUME reference spectroradiometerRegular intercomparisonsMeasuring StationQuality AssuranceLocal SpectroradiometerQASUMEAudit report and calibration certificate sent to local operator and published on www.pmodwrc.ch/euvc/euvc.htmlQASUME irradiance reference traceable to PTB</p></li><li><p>Comparison of spectroradiometersmatSHICQASUMETESTRatio TEST/QASUMESame wavelength scaleUniform slit width (1 nm default)</p></li><li><p>Wavelength scale</p><p>****</p></li></ul>