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2. USGS: Modis product table, https://lpdaac.usgs.gov/lpdaac/products/modis_products_table
3. WRF: Weather research and forecast, http://www.wrf-model.org
4. UCAR Unidata: Unidata integrated data viewer (idv), http://www.unidata.ucar.edu/software/idv/
5. NASA: Worldwind, http://worldwind.arc.nasa.gov/java/