MODIS/Terra+Aqua Albedo 16-Day L3 Global 1km SIN Grid
Entry ID:
MCD43B3
|
[
Get Data
]
[
Update this Record
]
|
Updating this record requires registration.
|
Summary
Abstract:
MODIS was launched aboard the Terra satellite on December 18, 1999 (10:30 am 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 level-2 MODIS cloud product consists of cloud optical and physical
parameters. These parameters are derived using remotely sensed
infrared, visible and near infrared solar reflected radiances. MODIS
infrared channel radiances are used to derive cloud top temperature,
cloud top height, effective emissivity, cloud phase (ice vs. water,
opaque vs. non-opaque), and cloud fraction under both daytime and
nighttime conditions. MODIS visible radiances are used to derive cloud
optical thickness and effective particle radius and cloud shadow
effects. Near infrared solar reflected radiance provides additional
information in the retrieval of cloud particle phase (ice vs. water,
clouds vs. snow). The shortname for this level-2 MODIS cloud product
is MOD06_L2 and the principal investigators for this product are MODIS
scientists Dr. Bo-Cai Gao ( gao@rsd.nrl.navy.mil) for cirrus cloud
detection; Dr. Paul Menzel ( paulm@ssec.wisc.edu) for cloud top
properties; and Dr. Michael King( king@climate.gsfc.nasa.gov) for
cloud optical properties .
The level-2 cloud product (MOD06_L2) consists of 46 gridded cloud
parameters. These parameters are produced at a spatial resolution of
either 1- km or 5-km (at nadir). Each MOD06_L2 product file covers a
five-minute time interval. This means that for 5-km resolution
parameters, the output grid is 270 pixels in width by 406 pixels in
length. Every tenth granule has an output grid size of 270 by 408
pixels. For 1-km resolution parameters, the output grid is 1354 pixels
in width by 2030 pixels in length and every tenth granule has an
output grid size of 1354 by 2040 pixels.
MOD06_L2 product files are stored in Hierarchical Data Format
(HDF-EOS). Forty four of the 46 gridded cloud parameters are stored as
Scientific Data Sets (SDS) within the file, the remaining two (band
number and statistics) are stored as Vdata(table
arrays). Approximately 288 files are produced daily. Nighttime files
are smaller than their daytime counterparts since only cloud top
properties are retrieved at night. Each daytime file is roughly 65.1
MB in size and each nighttime HDF file roughly 12.4 MB in size, and
the total data volume is approximately 12.3 GB/day.
MOD06_L2 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
Cloud Top Parameters (5km):
cloud top pressure from IR retriev(daytime,nighttime,all)
cloud top pressures from individual thermal band ratios
cloud height retrieval method, tropopause height
surface pressure
cloud top temperature (daytime,nighttime,all)
cloud effective emissivity (daytime,nighttime,all)
cloud fraction (daytime,nighttime,all)
cloud phase(daytime, nighttime, all)
Cloud Optical Properties (1km):
cloud optical thickness
cloud water path
effective particle radius
effective particle radius difference
Radiation Parameters:
spectral cloud forcing
cirrus reflectance
surface type (emissivity based)
Brightness Temperature
Brightness Temperature Difference
Quality Assurance Parameters:
Processing flag for 5 km resolution
cirrus reflectance flag for 1 km resolution
quality assurance flag for 1 & 5 km resolution
cloud mask for 1 & 5 km, radiance variance for thermal bands
statistics for parameters at 1km resolution
The MODIS Cloud Product will be used to investigate seasonal and
inter-annual changes in cirrus (semi-transparent) global cloud cover
and cloud phase with multispectral observations at high spatial (1
kilometer) resolution.
For more information about the MOD06_L2 product, visit the
MODIS-Atmosphere site at:
http://modis-atmos.gsfc.nasa.gov/MOD06_L2/
or
See the MODIS Science Team homepage for more data set
information at: http://modis.gsfc.nasa.gov/data/dataprod/ 
Related URL
|
Description:
Web site for MODIS Collection 5 L1B, Geo and atmosphere data ordering.
Web site for MODIS Collection 4 atmosphere data ordering.
|
Geographic Coverage
(Click for Interactive Map)
Spatial coordinates
| |
N: 90.0
|
|
S: -90.0
|
|
E: 180.0
|
|
W: -180.0
|
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
Quality
The 'version 004' or 'collection 004' product is better than 'version
003' and earlier versions. The quality of this version 004 product is
... established as 'Provisional' . It is based on a better calibration
algorithm but the product is not fully validated yet. Product images
look reasonable when compared to other spaceborne instruments
or comparable data in limited situations. Scientific use should be
performed with caution with careful reference to QA statements
provided with each product.For the latest information please see:
http://modis-atmos.gsfc.nasa.gov/products_calendar_overview.html.
Access Constraints
Available to public to gain familiarity with the data format and parameters.
Use Constraints
This Data set (version 004/collection 004) is of 'Provisional'
Quality. Even though, it is based on better calibration algorithm but
... is not fully validated yet. This data is still not appropriate for use
in scientific publications. Before using it in any publication please
contact science team representative for the known problems and
updates.
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
Phone:
301-614-5636
Fax:
301-614-5620
Email:
michael.d.king at nasa.gov
Contact Address:
NASA
Goddard Space Flight Center
Mailstop 610.0
City:
Greenbelt
Province or State:
MD
Postal Code:
20771
Country:
USA
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
Ackerman, S. A., W. L. Smith and H. E. Revercomb, 1990: The 27-28 October 1986 FIRE IFO cirrus case study: spectral properties of cirrus clouds in the 8-12 micron window. Mon. Wea. Rev., 118, 2377-2388. Ackerman, S. K. Strabala, P.Menzel, R. Frey, C. Moeller, and ... L. Gumley, 1998: Discriminating clear sky from clouds with
MODIS. J. Geophys. Res., 103, 32141-32157
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., Y. J. Kaufman, W. Han, and W. J. Wiscombe, 1998:
Correction of thin cirrus path radiance in the 0.4 - 1.0 ?m
spectral region using the sensitive 1.375-m cirrus detecting
channel, J.Geophys. Res., 103, 32169-32176.
Gao, B.-C., W. Han, S.-C. Tsay, and N. F. Larsen, 1998: Cloud
detection over arctic region using airborne imaging spectrometer data
during the daytime,J. Appl. Meteorol., 37, 1421-1429.
Gao, B.-C., and Y. J. Kaufman, 1995: Selection of the 1.375-?m
MODIS channel for remote sensing of cirrus clouds and stratospheric
aerosols from space, J. Atm. Sci., 52, 4231-4237.
Gao, B. -C, A. F. H. Goetz, and W. J. Wiscombe, 1993: Cirrus detection
from Airborne Imaging Radiometer using 1.38 micron water vapor
band. Geophys. Res. Letter, 4,301-304.
King, M., Y. Kaufman, W. P. Menzel, D. Tanre, B. Gao, 1999: MODIS
Atmosphere Validation Plan, NASA Goddard Space Flight Center, 48 pp.
King, M. D., S. C. Tsay, S. E. Platnick, M. Wang, and K. Liou, 1997:
Cloud Retrieval Algorithms for MODIS: Optical Thickness, Effective
Particle Radius, and Thermodynamic Phase ,Algorithm Theoretical Basis
Document, ATBD-MOD-05, NASA Goddard Space Flight Center,
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 Moderate
Resolution Imaging Spectrometer (MODIS). IEEE Trans. Geosci. Remote
Sens., 30, 2–27.
King, M. D., 1987: Determination of the scaled optical thickness of
clouds from re-flected solar radiation measurements. J. Atmos. Sci.,
44, 1734–1751.
King, M. D., M. G. Strange, P. Leone and L. R. Blaine, 1986:
Multiwavelength scanningradiometer for airborne measurements of
scattered radiation within clouds. J. Atmos. Oceanic Technol., 3,
513–522.
King, M. D., 1981: A method for determining the single scattering
albedo of clouds through observation of the internal scattered
radiation field. J. Atmos.Sci., 38, 2031–204.
Menzel, P., and M. King, 1997:MODIS Cloud Product, in MTPE EOS Data
Products Handbook,109-111.
Menzel, P., and K. Strabela. 1997: Cloud Top Properties and Cloud
Phase,Algorithm Theoretical Basis Document.ATBD-MOD-04, NASA Goddard
Space Flight Center,56 pp.
Menzel, W. P. and K. I. Strabala, 1989: Preliminary report on the
demonstration of the VAS CO2 cloud parameters (cover, height, and
amount) in support of the Automated Surface Observing System
(ASOS). NOAA Tech Memo NESDIS 29.
Nakajima, T., M. D. King , J. D. Spinhirne and L. F. Radke, 1991:
Determination of the optical thickness and effective particle radius
of clouds from reflected solar radiation measurements. Part II: Marine
stratocumulus observations. J. Atmos. Sci., 48, 728–750.
Nakajima, T., and M. D. King, 1990: Determination of the optical
thickness and effective particle radius of clouds from reflected solar
radiation measurements. Part I: Theory. J. Atmos. Sci., 47,
1878–1893.
Rossow, W. B., and L.C. Gardner, 1993: Cloud detection using satellite
measurements of infrared and visible radiances for ISCCP, J. Climate,
6, 2341-2369.
Strabala, K. I., S. A. Ackerman and W. P. Menzel, 1994: Cloud
properties inferred from 8-12 micron data. J. Appl. Meteor, 33, No. 2,
212-229.
Extended Metadata Properties
(Click to view more)
Creation and Review Dates
DIF Creation Date:
2003-04-03
Last DIF Revision Date:
2013-06-10
|
[
Update this Record
]
|
Updating this record requires registration.
|
|
