ISO INTERNATIONAL STANDARD 19289 Firstedition 2015-03-01 Air quality Meteorology Siting classifications for surface observing stations on land Qualité de I'air-Météorologie - Classifications des sites pour les stations terrestres d'observation Reference number IS0 19289:2015(E) SO International Organization for Standardization Zhejang Institute of Standardization 5956617 @ IS0 2015 vided by IHS underI itted without license from IHS IS0 19289:2015(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2015 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Case postale 56 : CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland vided by IHS unde Not for Resale, 2015/6/2 07:08:28 IS0 19289:2015(E) Contents Page Foreword ..iv Introduction.. ... 1 Scope. 2 Air temperature and humidity 2.1 General ..1 2.2 Class 1. 2.3 Class 2 .3 2.4 Class 3 (additional estimated uncertainty added by siting up to 1 'C) 2.5 Class 4 (additional estimated uncertainty added by siting up to 2 °C) .4 2.6 Class 5 (additional estimated uncertainty added by siting up to 5 °C) .4 Precipitation .5 3 3.1 General .5 3.2 Class 1 .5 3.3 Class 2 (additional estimated uncertainty added by siting up to 5 %) ..6 3.4 Class 3 (additional estimated uncertainty added by siting up to 15 %) .6 3.5 Class 4 (additional estimated uncertainty added by siting up to 25 %) 3.6 Class 5 (additional estimated uncertainty added by siting up to 100 %) 4 Surface wind ..7 4.1 General 4.2 Roughness .7 4.3 Environmentclassification 4.4 Class 1 8 4.5 Class 2 (additional estimated uncertainty added by siting up to30 %,possibility to apply correction).. .9 4.6 Class 3 (additional estimated uncertainty added by siting up to 50 %, correction cannot be applied) .9 4.7 Class 4 (additional estimated uncertainty added by siting greater than 5o %) ..10 4.8 Class 5 (additional estimated uncertainty cannot be defined) ..10 5 Global and diffuse radiation .10 5.1 General. .10 5.2 Class 1 .10 5.3 Class 2 .11 5.4 Class 3. 11 5.5 Class 4. .11 5.6 Class 5. .12 6 Direct radiation and sunshine duration .12 6.1 General. .12 6.2 Class 1 ..12 6.3 Class 2 .12 6.4 Class 3. .13 6.5 Class 4. ..13 6.6 Class 5. .13 Bibliography .14 iii see=Zhejiang Institute of Standardization 5956617 ted withoutlicensefromIHS Not for Resale, 2015/6/2 07:08:28