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YOTC International Science Symposium and 8th AMY International Workshop Beijing, China

YOTC Giovanni System (YOTC-GS)

 The Year of Tropical Convyotc_example_picture2.pngection (YoTC),, a joint activity of the World Climate Research Programme (WCRP) and World Weather Research Programme (WWRP)/THORPEX, is a 2-year period (May 2008 – April 2010) of coordinated observing, modeling, and forecasting with a focus on organized tropical convection, its prediction, and predictability. A major obstacle in research and model improvement of tropical convection and its multi-scale structure is that there is currently no single web portal or application that provides “one stop shopping” for the relevant NASA multi-satellite data.

The goal of the NASA Giovanni for the YoTC project is to facilitate NASA satellite data usage by providing a way the YoTC community can easily read, subset, visualize, access, and harmonize data from multiple space-borne sensors.

The NASA Giovanni is a web based application developed by the NASA Goddard Earth Science (GES) Data and Information Service Center (DISC) that provides a simple and intuitive way to visualize, analyze, and access/download vast amounts of Earth science remote sensing data. For a more complete description, see

YOTC-GS provides access to Level 2 (i.e. swath level data) and/or Level 3 (i.e. gridded/mapped data) forms of satellite data, the choice – or both – depending on what is appropriate and relevant. The former is needed and better suited for detailed process examination and the latter is needed and more well suited for examination of phenomena, conditions and processes on large to global scales, and for comparisons to global model analyses, prediction and simulation output.


YOTC Giovanni System for Level 3 is a web-based graphics and analysis tool to explore Level 3 data products easily and quickly.  

YOTC Giovanni System for Level 2 is a web-based graphics and analysis tool to explore Level 2 data products easily and quickly.

Giovanni provides what the international Committee on Earth Observation Satellites (CEOS) Working Group on Information Systems and Services (WGISS) refers to as “data democracy.” This term implies that data is available to all users in a standard, easy-to-implement format that does not presuppose prior experience or substantial resources. Anyone with a Web browser can access NASA satellite data through Giovanni without downloading any special software. There is no need to learn arcane data formats to retrieve and process data, and the subsetted data can be downloaded in a variety of common formats. All the statistical analysis is done via a regular web browser. Giovanni allows for equal access by established research establishments and users new to satellite data alike.


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Sign up for the YOTC-GS listserv to receive announcements on the latest data information, tools and services that become available, and more! Contact the GES DISC User Services to be added to the list.

Latest News

MODIS-Aqua Aerosol Optical Depth, averaged over the period March 2004 – June 2004, for the eastern tropical Atlantic Ocean.  The smoothed data display option is shown.
Oct 22, 2014 - The September 2014 issue of The Giovanni News is online

Noteworthy July & August publications, Giovanni Workshop Agenda, and plotting options in this issue

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The ESIP Federation brings together science, data, and information technology practitioners.
Jan 07, 2014 - Several members of the GES DISC attend ESIP Federation Winter Meeting 2014

Earth science data partners meet in Washington DC

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The impact of dust on the Mediterranean Basin is just one of many subjects researched with the aid of the Giovanni data visualization and analysis system.    (MODIS Terra image, February 25, 2006, courtesy NASA Visible Earth).
Jan 15, 2013 - Giovanni publication count for 2012 exceeds previous year

Broad diversity of uses for NASA data visualization and analysis tool seen in most recent compilation

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A new capability is being developed that will allow users to obtain maps and time series of precipitation for a specific country.
Jan 04, 2013 - Four presentations at the American Meteorological Society 93rd Annual Meeting from the NASA GES DISC

Presentations describe support for precipitation, weather model and climate model data

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Data partnerships and collaborations were the subject of several presentations by the NASA GES DISC at the AGU 2012 Fall Meeting.
Dec 21, 2012 - NASA GES DISC Presentations at AGU Fall Meeting 2012 Highlight Science Partners

Collaborations and data partnerships on hydrology, aerosols, precipitation, data preservation, and data assimilation described

+ Read More…

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Last updated: Aug 05, 2014 09:53 AM ET