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Dear Brewer spectrophotometer user community:

This is an invitation to Brewer experts and/or operators to participate in the COST ACTION ES1207 European Brewer Network (EUBREWNET) campaign / tenth Regional Brewer Calibration Center for Europe (RBCC-E) intercomparison that will be held at El Arenosillo Atmospheric Sounding Station of the Instituto Nacional de Técnica Aeroespacial (INTA) during the period 26 May to 5 June, 2015.

This campaign is part of the EUBREWNET ES1207 COST Action and is organized in collaboration with the Area of Instrumentation and Atmospheric Research of INTA, with the support of the Global Atmospheric Watch (GAW) program of the World Meteorological Organization (WMO) and a CEOS CALVAL project of the European Space Agency (ESA).

In November 2003, and within the GAW/WMO program, the Regional Brewer Calibration Centre for RA-VI Region (RBCC-Europe) was established by Izaña Atmospheric Research Centre (I-ARC) at Izaña Observatory (IZO, Canary Islands), managed by the Agencia Estatal de Meteorología (AEMET, Spain). Technical and organization information of the RBCC-E can be obtained at www.rbcc-e.org. <!–Experts of the Ad-Hoc Regional Brewer Scientific Group (RBSG-E) advice the RBCC-E, see the list in Annex 1, with particular working tasks (see Annex 2). –>

At present the RBCC-E maintains a triad of reference instruments. The Regional Primary Reference Spectrophotometer (B157) and the Regional Travelling Reference Spectrophotometer (B185) are part of the triad. Each spectrophotometer is calibrated independently with the standard Langley method at IZO. Until now the IZO Triad has been linked to the EC-MSC Word Reference Triad by yearly calibrations towards the International Ozone Services (IOS) travelling reference Brewer 017. Recently however as a result of doubts about the support of the world triad by (EC-MSC), the WMO SAG authorized (at the meeting of 2011) that the RBCC-E transfers its own calibration based on Langley at Izaña Station.

The traveling reference (B017) operated by IOS experts and the Kipp & Zonen travelling (B158) will participate to this intercomparison. That will allow participants to order IOS or Kipp & Zonen for technical servicing on their instruments during the campaign. The action focuses on the calibration of Brewer spectrophotometers from southern and central Europe.

Additionally, the QASUME unit of the Physikalisch-Meteorologisches Observatorium Davos / World Radiation Center (PMOD /WRC) will participate and provide a global UV reference spectrum for the ultraviolet measurements.

The campaign is scheduled in three main phases:

*Initial calibration to assess the current calibration of the instruments. *Servicing, adjustments and maintenance works. Characterization tests of the instruments. *Final calibration. In this phase the UV calibrations against the QASUME *Specific measurements for Brewer

Note: Click on Agenda tab below to see a detailed events list.

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The following services are offered by the RBCC-E during the intercomparison:

*Ozone calibration against the RBCC-E traveling reference (B185) *Compilation of the calibration histories of the instruments *Aerosol Optical Depth (AOD) Calibration for DS measurements.

The QASUME (Quality Assurance of Spectral Ultraviolet Measurements in Europe) unit from the PMOD-WRC will provide a UV calibration.

For accommodation details see Annex 1.

The El Arenosillo Atmospheric Sounding Station (INTA). Accommodation details are given in Annex 3

Click Here for a Google Map location.

<!–===Intructions to the participants===–> <!–Instructions to the Participants are already available. Please check them to see if you are ready!–>

<!–=== Updated Participant list === –> <!–21/07/2007 Participants List–> The organizers can invite up to 20 instruments with up to two operators per instrument. All participants are requested to contact the campaign coordinators and fill in the Registration and Internet Access forms before 15th April.

*The instruments should be operative, equipped with tripods and preferably running by their usual operator. *History of the instrument (AVG Files), last calibration and recent observations (B files) must be available at the intercomparison. Updated technical aspects can be checked through www.rbcc-e.org.

Traveling, instrument transportation and accommodation costs should be covered by the participants.

Extra financial support for developing countries or countries with economies in transition may be available from WMO-GAW. In case of major repairs the participants must directly order the service and agree fees with the Kipp & Zonen or IOS Company.

Alberto Redondas State Meteorological Agency - AEMET

Izaña Atmospheric Research Center I-ARC C/ La Marina, 20, 38071 Santa Cruz de Tenerife Spain

Tel: +34-922574487 Fax: +34-922574475 Email: <mail pre=“”>aredondasm@aemet.es</mail>

José Manuel Vilaplana National Institute for Aerospace Technology Atmospheric Research and Instrumentation Branch Atmospheric Sounding Station “El Arenosillo”

Ctra. San Juan del Puerto - Matalascañas Km.33 21130 Mazagon, Huelva Spain

Tel: +34-959208858 Fax: +34-959208857 Email: <mail>vilaplanagjm@inta.es</mail>

• Emilio Cuevas (<mail>ecuevasa@aemet.es</mail>); Izaña Atmospheric Research Center, Director (AEMET)
• Manuel Gil (<mail>gilm@inta.es</mail>); Atmospheric Research and Instrumentation, Head (INTA)

<!–* Benito de la Morena (<mail>morenacb@inta.es</mail>); El Arenosillo Atmospheric Sounding Station, Head (INTA)–>

Please confirm your participation before April 15, 2015

The following hotels are in Mazagón (the nearest village to the “El Arenosillo” Atmospheric Sounding Station). We suggest to book your accommodation as soon as possible.

Our first recommendation is Hotel Albaida:

• Albaida (*) :Telephone: +34.959376029/FAX: +34.959376108 :E-mail: <mail>informacion@hotelalbaida.com</mail> :Double room for individual: use 65.97 €, breakfast + 1 meal included *Hotel Mazagonia () :Telephone: +34.959377870 :E-mail: <mail>Info@mazagonia.es</mail> :Double room for individual use: 65€, includes breakfast, 81€, includes breakfast + one meal. * Hotel Martín Alonso Pizón (*)

:Telephone: +34.959377825/35 :Double room for individual use: 65€ breakfast + 1 meal included.

There is a number of rooms booked for this campaign, so please, do not forget to mention in the subject of your booking mail INTA Campaign

Please, contact Ms Pilar Sanz (<mail>sanzcp@inta.es</mail>) for updated and additional hotel information.

<!–

List of Regional Brewer Scientific Group members along with their mail addresses. –>

<!– Note: Email address links are Spam-protected on this site.–>

<!–You will need a javascript-enabled browser to see email addresses correctly. –>

<!–{| cellspacing=“0” cellpadding=“5” border=“1”–> <!–|—> <!–| <mail name=“A. Bais”>abais@auth.gr</mail> –> <!–| GRE –> <!–| Aristotle University of Thessaloniki–> <!–|—> <!–| <mail name=“E. Cuevas”>ecuevas@inm.es</mail> –> <!–| SPA –> <!–| AEMET, Izaña Atmospheric Research Centre–> <!–|—> <!–| <mail name=“H. DeBacker”>debacker@kmi-irm.be</mail> –> <!–| BEL –> <!–| Royal Met. Institute of Belgium, Uccle–> <!–|—> <!–| <mail name=“T. Grajnar”>tom.grajnar@ec.gc.ca</mail> –> <!–| CAN –> <!–| Meteorological Service of Canada–> <!–|—> <!–| <mail name=“J. Gröbner”>julian.groebner@jrc.it</mail> –> <!–| SWI –> <!–| World Radiation Center (WRC/PMOD)–> <!–|—> <!–| <mail name=“J. Jaroslawski”>januszj@igf.edu.pl</mail> –> <!–| POL –> <!–| Inst. Geoph. Polish Academie of Science–> <!–|—> <!–| <mail name=“U. Köhler”>ulf.koehler@dwd.de</mail> –> <!–| GER –> <!–| Met. Obs. Hehnpeissenberg–> <!–|—> <!–| <mail name=“T. Koskela”>koskela@fmi.fi</mail> –> <!–| FIN –> <!–| Finish Meteorological Institute–> <!–|—> <!–| <mail name=“J. Krzyscin”>jkrzys@igf.edu.pl</mail> –> <!–| POL –> <!–| Inst. Geoph. Polish Academy of Science–> <!–|—> <!–| <mail name=“A. Redondas”>aredondas@inm.es</mail> –> <!–| SPA –> <!–| AEMET, Izaña Atmospheric Research Centre–> <!–|—> <!–| <mail name=“J. Staehelin”>staehelin@iac.umnw.ethz.ch</mail> –> <!–| SWI –> <!–| Federal Institute of Technology, Zurich–> <!–|—> <!–| <mail name=“M. Stanek”>stanek@chmi.cz</mail> –> <!–| CHE –> <!–| Czech Hydromet. Institute, SOO-HK–> <!–|—> <!–| <mail name=“R. Stubi”>rene.stubi@meteoswiss.ch</mail> –> <!–| SWI –> <!–| MeteoSuisse, Observatory Payerne–> <!–|—> <!–| <mail name=“K. Vanicek”>vanicek@chmi.cz</mail> –> <!–| CHE –> <!–| Czech Hydromet. Institute, SOO-HK–> <!–|—> <!–| <mail name=“J. Vilaplana”>vilaplanagjm@inta.es</mail> –> <!–| SPA –> <!–| Inst. Nac. de Téc. Aeroesp, El Arenosillo–> <!–|}–>

<!–== Annex 2: RBSG-E Working Task ==–> <!–With reference to responses submitted after the RBSG-E meeting held at El Arenosillo/Mazagon, September 2003, the following specialists from Europe and MSC have been affiliated with particular working tasks defined at the meeting. Underlined are the experts which have expressed their preliminary interest to lead/coordinate groups on the following working tasks:–>

<!–*WT1: Establishment and maintenance of Regional Brewer Reference Spectrophotometers: E. Cuevas, A. Redondas, M. Stanek, T. Grajnar–>

<!–*WT2: Instruments. Calibration histories: K. Vanicek–>

<!–*WT3: Relation between the Dobson and Brewer calibration scales: J. Staehelin, H. DeBacker, U. Köhler, J. Krzyscin, K. Vanicek–>

<!–*WT4: UV calibration of Brewer spectrophotometers: J. Gröbner, A. Bais, T. Koskela–>

<!–*WT5: Measurements of UV Aerosol Optical Depth with Brewer spectrophotometers: A. Bais, H. DeBacker, J. Gröbner, J. Jaroslawski–>

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