The Goddard Earth Sciences Data and Information Services Center (GES DISC) created the GES DISC Interactive Online Visualization and ANalysis Infrastructure, Giovanni, to enable Web-based analysis of several NASA Earth remote-sensing and climate data sets. Giovanni was conceived as a research tool to increase the usability of climate data sets, but it can also be used to evaluate climate data for purposes of overview and site assessment, trend detection, anomaly detection, and identification of significant events and potential hazards. The simplicity of Giovanni allows users unfamiliar with the scientific and technical details of Earth remote sensing to utilize climate data for the purposes of short-term and long-term decision making, and the determination of future research needs. Giovanni facilitates an easy entry into Earth system science research using remote-sensing data for every level of research user, from skilled scientist to novice investigators.
Giovanni features a simple user interface allowing rapid access to data, establishment of spatial and temporal criteria, and a variety of output options. The data analysis engine provides rapid statistical analyses and generation of area average plots, time plots, Hovmöller latitude vs. time and longitude vs. time plots, vertical profiles, data set intercomparisons, and anomaly analysis. Giovanni has been applied to several different climate data sets, including precipitation, atmospheric chemistry, ocean color, and sea surface temperature.
The first section of the Giovanni Online Users Manual addresses the primary capabilties of the Giovanni interface for ocean color data from the Sea-viewing Wide Field-of-view Sensor (SeaWiFS) and the Moderate Resolution Imaging Spectroradiometer (MODIS) on the Aqua multi-sensor Earth observation satellite. The data products utliized in Ocean Color Giovanni were created by the Ocean Biology Processing Group (OBPG) at NASA Goddard Space Flight Center. Subsequent sections will address the Giovanni interfaces for other remote-sensing data sets. Many of the Giovanni functions are shared by different types of data, but some functions are specific to a particular data set.