A collaboration between NASA's Marshall Space Flight Center, the University of Alabama in Huntsville, and Remote Sensing Systems, the Passive Microwave Earth Science Information Partner (PM ESIP) web site allows users to interactively customize and receive hydrologic data sets for use in atmospheric process studies, and in regional and global climate studies. Users can track hurricanes and typhoons; view tropical sea surface temperature, water vapor, wind speed, and rainfall data; view atmospheric temperature images; review temperature trends; interactively select and view data from multiple satellite sensors; or order and download custom and predefined data sets.