A New Multifunctional GES DAAC Data Processing and Visualization Tool for Land, Ocean and Atmosphere MODIS Data
Abstract
The unique position of the NASA Goddard Earth Sciences Distributed Active Archive Center (GES DAAC) as an intermediary between users and MODIS data led us to explore and develop tools that could help users access and manipulate data. Currently all available tools are not able to meet the MODIS data processing requirements, which are critical at the GES DAAC. Our goal was to unify the strengths of the current tools and add new features in a new tool intended to visualize, validate, and analyze MODIS data. HDFLook-MODIS is a result of joint collaboration between LOA USTL, France, and GES DAAC and is based on the very popular MSPHINX (http://www-loa.univ-lille1.fr/informatique/anim.html) tool philosophy. Created as a flexible modular tool, is it easy to update, add new features, and is free to users obtaining it from the GES DAAC. HDFLook-MODIS helps MODIS Data Support Team significantly to visualize, validate and analyze MODIS data, and also is to be used for batch-mode local processing. Main features of HDFLook-MODIS are: 1) Accessing and visualization of all swath (level-1, and 2) and gridded (level-3 and 4) MODIS radiometric and geolocation, atmosphere, land, and ocean products; 2) Re-mapping of swath data to world map. Geo-projection conversion. Reprojection the initial projection into several pre defined selection; 3) Interactive and batch mode capabilities; 4) Subsetting features - availability of parameter, band, and spatial subsetting; 5) Multi-granule processing - Mosaic and stitch capabilities; 6) Displays ancillary/data attributes; 7) Data conversion- from scaled quantities to physical units. Format conversion- HDF-EOS to ASCII, Binary, JPEG, GIS (Geo Tiff shape files); 8) Aerosol and other ancillary data available from the ground based sun photometer measurements (AERONET data bank) for the atmospheric correction and validation of some atmospheric products. HDFLook-MODIS is developed for XWindows computer envorment and has been tested on SGI and Linux systems. This presentation will describe HDFLook-MODIS tool that is intended to optimize MODIS data use for the Earth Science community. The options for data formats, data projections, subsetting functions, and data visualization are described and user feedback is encouraged.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2001
- Bibcode:
- 2001AGUFM.A41B0041G
- Keywords:
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- 0394 Instruments and techniques;
- 0933 Remote sensing