ONLINE ACCESS TO WEATHER-SATELLITE IMAGERY AND IMAGE MANIPULATION SOFTWARE

Advanced Very High Resolution Radiometer and Geostationary Operational Environmental Satellite imagery, received by antennas located at the University of Colorado, are made available to the Internet users throu gh an on-line data access system. Created as a ''test bed'' data syste m for the National Aeronautics and Space Administration's future Earth Observing System Data and Information System, this test bed provides an opportunity to test both the technical requirements of an on-line d ata system and the different ways in which the general user community would employ such a system. Initiated in December 1991, the basic data system experienced four major evolutionary changes in response to use r requests and requirements. Features added with these changes were th e addition of on-line browse, user subsetting, and dynamic image proce ssing/navigation. Over its lifetime the system has grown to a maximum of over 2500 registered users, and after losing many of these users du e to hardware changes, the system is once again growing with its own i ndependent mass storage system.