HR: 1340h
AN: A33C-0932    [Abstracts]
TI: MODIS Atmospheres and Land Archive and Distribution Systems
AU: Teague, M J
EM: mteague@saicmodis.com
AF: SAIC, Forbes Blvd., Greenbelt, MD 20771 United States
AU: Hucek, R R
EM: rhucek@saicmodis.com
AF: SGT Inc., c/o SAIC, Forbes Blvd., Greenbelt, MD 20771 United States
AU: Masuoka, E J
EM: emasuoka@pop900.gsfc.nasa.gov
AF: NASA/GSFC, Code 614.5, Greenbelt Rd., Greenbelt, MD 20771 United States
AU: Ridgway, W L
EM: ridgway@climate.gsfc.nasa.gov
AF: SSAI, c/o NASA GSFC, Greenbelt. Rd., Greenbelt, MD 20771 United States
AU: Ye, G
EM: gye@saicmodis.com
AF: SAIC, Forbes Blvd., Greenbelt, MD 20771 United States
AU: * Wolfe, R E
EM: robert.e.wolfe@nasa.gov
AF: NASA/GSFC, Code 614.5, Greenbelt Rd., Greenbelt, MD 20771 United States
AB: The purpose of the MODIS Atmospheres Archive and Distribution System (AADS) and the parallel Land Archive and Distribution System (LADS) is to provide the atmospheres and land science communities with rapid and flexible access to large volumes of MODIS data from the NASA's EOS Terra and Aqua spacecraft. The systems take advantage of the fact that the cost of disk has reduced sufficiently that it is now cost-effective to retain several tens of terabytes of data on-line. MODIS is preparing for the next Aqua and Terra reprocessing (Collection 5) and the AADS and LADS have been used to support the science communities' evaluation of numerous science test products. For the atmospheres discipline the system will be used to archive approximately 8.5 data-years of HDF-compressed data products from the Collection 5 MODIS reprocessing as well as near-real time data. All Level 2 (L2) through 4 atmosphere products, including, aerosol, cloud, water vapor, and L2 and L3 granule and global browse will be archived (40TB). L1B, geolocation products will not be archived but will be available on a processing-on-demand basis. For Collection 5 land reprocessing, all 8-, 16- and 32-day products will be archived and daily products will be archived on a rolling 30-day basis. Land L2 and daily products will also be available through processing-on-demand. A web-based search and order system allows the users to identify and acquire data sets in a rapid and flexible manner based on user-defined criteria. The user may search on Collection number, product, time interval, spatial criteria ("rubber-band") and day/night coverage. Searches of the L2 and L3 browse can also be performed. The granule images can be displayed in "thumbnail" or expanded form and side-by-side displays of user-specified parameters can be made. The results of the search are available in seconds. Parameter sub-setting (i.e. selection of specific parameters contained within a product) and geographic sub-settting (i.e. elimination of data outside of a specified geographic zone) are available. Data delivery is via ftp pull and options include direct access to the distribution archive, use of a staging directory, and download using GNU Wget. A key element of the AADS and LADS approach is that continued refinement of the system will occur in response to the requirements of the atmospheres and land science communities. Requirements have been developed to add a variety of analysis capabilities to the systems and these are expected to be available by early-2006.
UR: http://aadsweb.nascom.nasa.gov:8100/
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0320 Cloud physics and chemistry
DE: 0394 Instruments and techniques
DE: 0399 General or miscellaneous
DE: 0430 Computational methods and data processing
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005