In order to provide guidance to support NMSs, especially smaller Services and those in developing countries, in their service delivery activities by keeping pace with developments in technology, a Technical Document (PWS-1, WMO/TD No. 1054) was prepared in 1999 under the auspices of the WMO Technical Commission for Basic Systems (CBS) by the Public Weather Services Expert Team on Product Development and Verification and Service Evaluation. The purpose of that Technical Document was to provide a framework for the requirements of public weather services for data and products. At its twelfth session (Geneva, 2000), CBS re-established the expert team under the modified title of Expert Team on Product Development and Service Assessment and requested it to review the above-mentioned Technical Document in order to include the application of research to public weather services as well as to modify and update it as necessary where new technologies and their relevance to public weather services were concerned. The Expert Team duly prepared the present Technical Document at a meeting in Honolulu in 2001. This Technical Document has built on the original framework with notable additions to some already existing topics: (Chapter 2.2) satellite technology; (Chapter 2.3) radar technology; (Chapter 2.4) workstation technology. Other new topics include application of research to more effective production and delivery of public weather services (Chapter 3),which includes Computer Aided Learning (CAL).Chapter 4 discusses new and improved public weather products related to human biometeorology. Finally, Chapter 5 concentrates on exchange of all products related to PWS through a modernized WMO Information System.
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