21st Conference on Climate Variability and Change
25th Conference on International Interactive Information and Processing Systems (IIPS) for Meteorology, Oceanography, and Hydrology


Online Visualization and Analysis of Global Half-hourly Pixel-Resolution Infrared Dataset

Zhong Liu, George Mason University/CEOSR, Fairfax, VA and NASA/GSFC, Greenbelt, MD; and D. Ostrenga, G. G. Leptoukh, and A. V. Mehta

The Goddard Earth Sciences Data Information Services Center (GES DISC) is home of Tropical Rainfall Measuring Mission (TRMM) data archive. The global merged IR product, also known as, the NCEP/CPC 4km Global (60šN - 60šS) IR Dataset, is one of TRMM ancillary datasets. They are globally-merged (60šN-60šS) pixel-resolution IR brightness temperature data (equivalent blackbody temps), merged from all available geostationary satellites (GOES-8/10, METEOSAT-7/5 & GMS). The availability of data from METEOSAT-5, which is located at 63E at the present time, yields a unique opportunity for total global (60šN-60šS) coverage. The GES DISC has collected over 8 years of the data beginning from February of 2000. This high temporal resolution dataset can not only provide additional background information to TRMM and other satellite missions, but also allow observing a wide range of meteorological phenomena from space, such as, mesoscale convection system, tropical cyclones, hurricanes, etc.

Despite that the data can be downloaded via ftp, however, its large volume poses a challenge for many users. A single file occupies about 70 MB disk space and there is a total of ~73,000 files (~4.5 TB) for the past 8 years. Because there is a lack of data subsetting service, one has to download the entire file, which could be time consuming and require a lot of disk space.

In order to facilitate data access, we have developed a web prototype, the Global Image ViewER (GIVER), to allow users to conduct online visualization and analysis of this dataset. With a web browser and few mouse clicks, users can have a full access to over 8 year and over 4.5 TB data and generate black and white IR imagery and animation without downloading any software and data. Basic functions include selection of area of interest, single imagery or animation, a time skip capability for different temporal resolution and image size. Users can save an animation as a file (animated gif) and import it in other presentation software, such as, Microsoft PowerPoint. These capabilities along with examples will be presented in this poster.

extended abstract  Extended Abstract (1020K)

wrf recording  Recorded presentation

Supplementary URL: http://disc.gsfc.nasa.gov/hurricane/trmm_quikscat_analysis.shtml

Joint Session 3, Distributed Earth Science Information Systems
Wednesday, 14 January 2009, 1:30 PM-2:30 PM, Room 129A

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