MODIS/Aqua Total Precipitable Water Vapor 5-Min L2 Swath 1km and 5km (Collection 004 and 005)
Entry ID:
MYD05_L2
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Summary
Abstract:
MODIS was launched aboard the Aqua satellite on May 04, 2002 (1:30 pm equator crossing time) as part of NASA's Earth Observing System (EOS) mission. MODIS with its 2330 km viewing swath width provides almost daily global coverage. It acquires data in 36 high spectral resolution bands between 0.415 to ... 14.235 micron with spatial
resolutions of 250m(2 bands), 500m(5 bands),and 1000m (29
bands). MODIS sensor counts, calibrated radiances, geolocation
products and all derived geophysical atmospheric and ocean products
are archived at NASA Goddard DAAC and has been made available to
public since April 2000.
The MODIS level-2 atmospheric precipitable water product consists of
total atmospheric column water vapor amounts (and ancillary
parameters) over clear land areas of the globe, over extended clear
oceanic areas with the Sun glint, and above clouds over both land and
ocean. These estimates are based on a near-infrared algorithm using
only daytime measurements with solar zenith angle less than 72
degrees. The retrieval algorithm relies on observations of water vapor
attenuation of near-infrared solar radiation reflected by surfaces and
clouds. The product is produced only over areas that have reflective
surfaces in the near-infrared. The infrared-derived precipitable water
vapor generated for both daytime & nighttime conditions as one
component of another MODIS product (MYD07) is also provided as a part
of this product.
The shortname for this level-2 MODIS total precipitable water vapor
product is MYD05_L2 and the principal investigators for this product
are MODIS scientists Dr. Bo-Cai Gao ( gao@rsd.nrl.navy.mil), Dr. Paul
Menzel (paulm@ssec.wisc.edu), and Dr. Yoram Kaufman.
MYD05_L2 product files are stored in Hierarchical Data Format
(HDF-EOS). The file contains 13 gridded parameters. Each of these
gridded MYD05 parameters is stored as a Scientific Data Set (SDS)
within the HDF-EOS file. The Water Vapor and Quality Assurance SDS's
are stored at 1 kilometer (near-infrared) and 5 kilometer (for
infrared) pixel resolution. All other SDS's (those relating to time,
geolocation, and viewing geometry) are stored at 5 kilometer pixel
resolution. The Cloud Mask SDS, copied from the MYD35_L2 Product is
stored at 1 kilometer resolution. Each file is roughly 14.6 MB in
size, and the total data volume is approximately 2.9 GB/day.
MODIS Data Category & Parameters
Spatial & Temporal Resolution:
latitude,longitude
scan start time
Solar and Sensor Viewing Geometry:
solar zenith angle, solar azimuth angle
sensor zenith angle, sensor azimuth angle
Water Vapor Parameters:
near-infrared estimated water vapor(1km)
water vapor correction factors(1km)
infrared estimated water vapor(5km)
Quality Assurance & Statistical Parameters:
QA flags for near-infrared retrieval(1km)
QA flags for infrared retrieval(5km)
cloud mask(1km)
The near-infrared water vapor estimates are very sensitive to boundary
layer water vapor since they are derived from atmospheric attenuation
of surface reflected radiances. This product is essential to the
understanding of hydrological cycle, aerosol properties, aerosol-cloud
interactions, energy budget, and climate.
For more information about the MYD05_L2 product, visit the
MODIS-Atmosphere site at:
http://modis-atmos.gsfc.nasa.gov/MOD05_L2/ 
Related URL
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Description:
Access Collection 5 data set MYD05_L2 from the LAADS FTP server.
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Geographic Coverage
(Click for Interactive Map)
Spatial coordinates
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N: 90.0
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S: -90.0
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E: 180.0
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W: -180.0
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Data Set Citation
Dataset Originator/Creator:
MODIS Atmosphere Team
Dataset Title:
MODIS/Aqua Total Precipitable Water Vapor 5-Min L2 Swath 1km and 5km
Version:
Collection 004 and 005
Online Resource:
http://modis-atmos.gsfc.nasa.gov/MOD05_L2/
Data Resolution
Latitude Resolution:
5 km
Longitude Resolution:
5 km
Horizontal Resolution Range:
1 km - < 10 km or approximately .01 degree - < .09 degree
Temporal Resolution:
5-minute
Temporal Resolution Range:
1 minute - < 1 hour
Access Constraints
Available to public to gain familiarity with the data format and
parameters.
Distribution
Distribution Media:
Online (FTP)
Distribution Size:
15 GB
Distribution Format:
HDF
Fees:
None
Personnel
Role:
DIF AUTHOR
Phone:
301-352-2109
Email:
gang.ye at sigmaspace.com
Role:
TECHNICAL CONTACT
Phone:
301-731-2917, 1-866-506-6347 (toll-free - US only)
Fax:
301-577-6622
Email:
modapsuso at sigmaspace.com
Contact Address:
LAADS User Support Team
4801 Forbes Boulevard
City:
Lanham
Province or State:
MD
Postal Code:
20706
Country:
USA
Role:
INVESTIGATOR
Phone:
202-767-8252
Fax:
202-404-8894
Email:
gao at rsd.nrl.navy.mil
Contact Address:
Naval Research Laboratory
Remote Sensing Division, Code 7212
4555 Overlook Ave., SW
City:
Washington
Province or State:
DC
Postal Code:
20375-5320
Country:
USA
Role:
INVESTIGATOR
Role:
INVESTIGATOR
Phone:
608-264-5325
Fax:
608-262-5974
Email:
paulm at ssec.wisc.edu
Contact Address:
NOAA/NESDIS
Space Science and Engineering Center
University of Wisconsin-Madison
1225 W. Dayton St.
City:
Madison
Province or State:
WI
Postal Code:
53706
Country:
USA
Publications/References
References: Chu, A., K. Strabala, S. Platnick, E. Moody, M. King, S. Mattoo, R. Hucek, and B. Ridgway, 2000: MODIS Atmosphere QA Plan. Version 2.2 , NASA Goddard Space Flight Center, 46 pp. Gao, B. C., and Y. J. Kaufman, 1998: The MODIS Near-infrared ... Water
Vapor Algorithm, Algorithm Theoretical Basis Document, ATBD-MYD-03,
NASA Goddard Space Flight Center,25 pp.
Gao, B. C. , and Y. J. Kaufman, 1997: MODIS Total Precipitable Water,
MTPE EOS Data Products Handbook,93-94.
Gao, B. C., and A. F. H. Goetz, 1990: Column Atmospheric Water Vapor
and Vegetation Liquid Water Retrievals From Airborne Imaging
Spectrometer Data, J. Geophys. Res., 95, 3549-3564.
Kaufman, Y. J., and B.-C. Gao, 1992: Remote sensing of water vapor in
the near IR from EOS/MODIS, IEEE Trans. Geosci. Remote Sensing, 30,
871-884.
King, M. D., Y. J. Kaufman, W. P. Menzel, D. Tanre, B. C. Gao, 1999:
MODIS Atmosphere Validation Plan, NASA Goddard Space Flight Center, 48
pp.
King, M. D., W. P. Menzel, P. S. Grant, J. S. Myers, G. T. Arnold,
S. E.Platnick, L. E.Gumley, S. C. Tsay, C. C. Moeller, M. Fitzgerald,
K. S. Brown and F. G.Osterwisch, 1996: Airborne scanning spectrometer
for remote sensing of cloud, aerosol, water vapor and surface
properties. J. Atmos. Oceanic Technol.,13, 777^?794.
King, M. D.,Y. J. Kaufman, W. P. Menzel, and D. Tanr?, 1992: Remote
sensing of cloud,aerosol, and water vapor properties from the MYDerate
Resolution Imaging Spectrometer(MODIS). IEEE Transactions on
Geoscience and Remote Sensing, 30,2-27.
Extended Metadata Properties
(Click to view more)
Creation and Review Dates
DIF Creation Date:
2003-04-22
Last DIF Revision Date:
2011-05-09
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