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Lake Maggiore - Italy, 3-6 April 2000

Improving access to VEGETATION data: some results of on-going experiments

E. Bartholomé*, V. Gond*, S. Morimondi*
*Joint Research Ispra, Italy

Paper (pdf file, 208 k)

Distribution of VEGETATION data is currently based on two different procedures: express courier and ftp. The purpose of the study, carried out in the framework of the Share Cost Action "improvements… for the VEGETATION mission", is to find ways by which access to data can be facilitated and speeded up especially for operational users.

The driving lines of the experiment are as follows: 1) make better use of broadly available techniques 2) keep extra operational costs as small as possible, and anyway compatible with data prices, 3) facilitate rather than complicate the use of VEGETATION data for final analysis

The actions are focussing on 3 topics: improving data transfer, automating procedures, conditioning data

Improving data transfer

Several long duration tests are being carried out to assess data accessibility for users working in "constraining telecommunication network conditions", national and sub-continental applications in Africa, continental applications in Asia and global applications in Europe. Both ftp and email attachment have been successfully tested. Alternative methods to standard Internet are also being assessed.

Automation procedures

One of the elements of an efficient operational system is automation of repeated actions. Tools are developed to automate ftp file retrieval and file expedition as email attachment.

Data conditioning

Tests are carried out produce and evaluate with end-users simple derived products that facilitate both data transfer and data analysis. This includes the production compressed colour composites for visual analysis, of useful band combinations to provide extended information in a highly compacted manner, etc…

This experience shows that for VEGETATION data distribution the end-user service can easily be improved at marginal cost by improving the use of available telecommunication infrastructure. This can be achieved with limited impact on the current central processing facility architecture. Users can be served all over the world with such techniques. By doing so delivery times are fully compatible with most operational applications.