[Personnel: Last_Name='GES DISC HELP DESK SUPPORT GROUP']
AIRS/Aqua Level 3 Pentad quantization in physical units (AIRS-only) V005 (AIRS3QP5) at GES DISCEntry ID: GES_DISC_AIRS3QP5_V005
Abstract: AIRS/Aqua Level 3 pentad quantization product in physical units (AIRS Only).
The quantization products (QP) are distributional summaries derived from the Level-2 standard retrieval products (of swath type) to provide a more comprehensive set of statistical summaries than the traditional means and standard deviation. The QP products combine the Level 2 standard data ... parameters over grid cells of 5 x 5 deg spatial extent for temporal periods of five days. Pentads always start on the 1st, 6th, 11th, 16th, 21st, and 26th days of the month and may contain as few as 3 days of data or as much as 6 days. They preserve the multivariate distributional features of the original data and so provide a compressed data set that more accurately describes the disparate atmospheric states that is in the original Level-2 swath data set.
The geophysical parameters are: Air Temperature and Water Vapor profiles (11 levels/layers), Cloud fraction (vertical distribution).
(The Shortname for this product is AIRS3QP5)
Data Set Citation
Dataset Originator/Creator: AIRS Science Team/Moustafa Chahine
Dataset Title: AIRS/Aqua Level 3 Pentad quantization in physical units (AIRS-only)
Dataset Series Name: AIRS3QP5
Dataset Release Date: 2007-07-26
Dataset Release Place: Greenbelt, MD, USA
Dataset Publisher: Goddard Earth Science Data and Information Services Center (GES DISC)
Data Presentation Form: Digital Science DataOnline Resource: http://disc.sci.gsfc.nasa.gov/datacollection/AIRS3QP5_V005.html
Start Date: 2007-06-01
Latitude Resolution: 5 degrees
Longitude Resolution: 5 degrees
Horizontal Resolution Range: 500 km - < 1000 km or approximately 5 degrees - < 10 degrees
Temporal Resolution: Once per 5 days
ISO Topic Category
Quality The L3Q products combine the Level 2 standard data parameters over grid cells of 5 x 5 deg spatial extent for temporal periods of five days and one month. The report for each grid cell provides a number of representative values and their associated weights. The sample of lower level data points with the same representative is called a “cluster”, and its representative is the “cluster mean”. ... Cluster membership is determined by assigning lower level data points to clusters so that that the errors between original values and their representatives are minimized. This constraint prevents the creation of single-data-point clusters.
As a general rule, Level 2 retrieved quantities whose quality indicators are “best” (=0) or “good” (=1) are included in the data that generate the L3Q product. Users MUST read information contained within the two documents below to avoid misuse of the L3Q products in their research.
Access Constraints Not publicly available at the moment.
Data Set Progress
Distribution Media: FTP
Distribution Size: 43 MB
Distribution Format: HDF-EOS
Role: DIF AUTHOR
Email: asghar.e.esfandiari at nasa.gov
Goddard Earth Sciences Data and Information Services Center Code 610.2 NASA Goddard Space Flight Center
Province or State: MD
Postal Code: 20771
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2007-01-05
Last DIF Revision Date: 2014-12-18
Future DIF Review Date: 2015-06-30