To give Users the capability to upload, test their algorithms and mine data from the GDAAC online cache. Manage User’s research data more efficiently Decrease download time by applying algorithm closer to the Data Apply Knowledge Discovery in Database (KDD)
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
and mine data from the GDAAC online cache.
User Developed Algorithm
GDAAC Web Site:http://g0dug03u.ecs.nasa.gov/OPS/www/nadm/index.html
Acknowledgements:Authors would like to acknowledge all GES DAAC data support teams for their contributions and Edee Ocampo for graphics support. This work is supported by the NASA/GSFC Earth Science Enterprise.
GES DAAC Services and Tools for the Terra and Aqua MODIS User Community
A. Gopalan, D. Nickless, D.Ouzounov, A.Savtchenko, L. Pham, C. Lynnes, S. Berrick, Z. Liu and H.Rui
Near-line Archive Data Mining (NADM)
based on User demand.
execute them on their local systems.
MODIS L3 Atmospheric Products Online Visualization
and Analysis System (MOVAS)
GES DISC/DAAC is pleased to announce the GES DAAC Data User Online Collaboration forums.
These Web-based forums have been set up to help you, the Data User, interact and collaborate with other Users and the DISC/DAAC on issues regarding the Data we distribute.
The URL to bookmark is: http://disc.gsfc.nasa.gov/forum/
MODIS – User Discussion Forum specifically for users of GES DAAC MODIS data
Data -> Aerosol – User Discussion Forum specifically for users of GES DAAC aerosol data.Data -> Cloud - User Discussion Forum specifically for users of GES DAAC cloud data.Data -> Ocean Color – User Discussion Forum specifically for users of GES DAAC ocean color data.
Grid Analysis and Display System (GrADS) is used as a back-end engine for analysis.
GES DAAC SERVICES:
GES DAAC DESKTOP TOOLS:
Automated Subscriptions to any Data in the Archive.
Subsetting Services: These include On-demand Channel and Paremeter Subset, On-the-Fly subsetting.
HDFLook-MODIS is a new, multifunctional, data processing and visualization tool for Radiometric and Geolocation, Atmosphere, Ocean, and Land MODIS HDF-EOS data. Features include: accessing and visualization of all swath (Levels l and 2) MODIS and AIRS products, and gridded (Levels 3 and 4) MODIS products; re-mapping of swath data to world map; interactive and batch mode capabilities; subsetting and multi-granule processing; and data conversion.
MOVAS (MODIS L3 atmospheric data Online Visualization and Analysis System)is designed for quick exploration, analyses, and visualization of MODIS Atmospheres Monthly Level-3 product.
NADM (Near-line Archive Data Mining) give Users the capability to upload, test their algorithms and mine data from the GDAAC online cache.
SIMAPis an IDL-based script that is designed to read and map MODIS Level 1B and Level 2 Ocean and Atmosphere products. The resulting maps are scaled to physical units (e.g., radiances, concentrations, brightness temperatures etc.) and saved in binary files. One of simap's strengths is the composition of global maps, or the stitching together of multiple L1B or L2 granules on a single world map.
WebGISis an online web software that implements the Open GIS Consortium (OGC) standards for mapping requests and rendering.
Content-based Services (Only for MODIS Direct Broadcast Radiance Data)
Overview of GES DAAC Services and Tools Functionality
Data Pool (Fast Online Disk Cache):
This consists (50 TB) Anonymous FTP area where "fresh" data are made available on a
rotating basis. Its advantage is the ability for users to directly download data of interest,
without having to submit an order. FTP Scripts automatically generated by the System, On-
the-Fly Compression Capability can be used to optimize Data transfer process.
Automated Data Subscriptions:
(10 Gb Limit per Subscription per Day) to any Data in the Archive. Can Customized to
various Data Attributes (e.g Area of Interest). Suited to Users who require a regular stream
of Data over their Area of Interest. Special arrangements with GDAAC are necessary to
use this Service. Please contact (firstname.lastname@example.org).
Data Distribution Options:
Electronic (FTP) Options include FTPPULL (User will need to FTP Data staged on a
GDAAC FTPServer) and FTPPUSH (User FTP Server is Configured to accept Data
Transfer from GDAAC). Distribution subject to Limit of 1000 “Granules per Order”.
Hard Media Options include DVD (GDAAC supplied Limit: 95 per Year), 8mm Tapes
(GDAAC supplied Limit: 65 per Year), DLT (GDAAC supplied Limit: 6 per Year). User will
be required to supply their own media if their Data order exceeds above limits.
“Send only scenes where Lake Winnebago, Wisconsin is visible”
Extract useful pixels, or
Mask out useless pixels
content-based cache management
“Least-recently-used” (LRU) algorithm is less useful for very active caches.
Content-based caching applies simple heuristics to scene content to:
(1) Retain scenes with more useful/interesting pixels
(2) Purge less useful scenes quickly
MODIS Global Browse Images
SIMAP maps MODIS Level 1B, Level 2 Oceans and Atmosphere Data:
HDFLook-MODIS is a result of joint collaboration between LOA UST, France, and GES DAAC.
MODIS/Terra Level 2: Local Scenes: 5-minute orbital swaths, 1 km (produced with SIMAP)