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The ATSR-WFA Web Tool: easy access to the WFA archive

Stefano Casadio(1), Roger Nay(1) and Olivier Arino(2)

(1) SERCO spa, ESA/ESRIN, via Galileo Galilei, 00044 Frascati (RM), Italy
(2) ESA, ESA/ESRIN, via Galileo Galilei, 00044 Frascati (RM), Italy

Abstract

The ATSR World Fire Atlas is certainly a successful ESA project, with thousands of active users who download its "simple" near-real-time and consolidated products for very different purposes, from research on climate to fire risk management. At the end of 2006 the WFA team decided to send a detailed questionnaire to all registered users (around 1000) in order to get feedback on the quality of WFA products and services. A request common to many users was to include auxiliary information (e.g. land cover classification, country, administrative) to the hot spot products, and make this information available via the world wide web. In response to this need, the WFA team immediately started developing a new system designed to meet the demands of the user community. The results of this effort is the ATSR-WFA Product Access Tool (http://wfaa-dat.esrin.esa.int/), also accessible via the WFA web site (http://dup.esrin.esa.int/ionia/wfa/). The Product Access Tool was officially launched during the last ENVISAT Symposium in Montreux on the 23-27 of April 2007, and the number of active users is currently greater than 320. It covers the complete ATSR-WFA data set, spanning from November 1995 to now, and is updated with new products on monthly basis. The Product Access Tool was written in the PHP programming language utilising CSS Layers, Javascript and XMLHttpRequest techniques. Dynamic plotting and charting of hot spots (stored in a MySQL relational database) are achieved using the GD Graphics Library. This paper describes the possibilities offered by the ATSR-WFA Product Access Tool, focusing on: 1) how to access the web site 2) which products are available 3) data output formats 4) how to select data specifying the country and time frame of interest

 

Keywords: ESA European Space Agency - Agence spatiale europeenne, observation de la terre, earth observation, satellite remote sensing, teledetection, geophysique, altimetrie, radar, chimique atmospherique, geophysics, altimetry, radar, atmospheric chemistry