MODIS/Aqua Temperature and Water Vapor Profiles 5-Min L2 Swath 5km (Collection 004 and 005)
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 level-2 MODIS Temperature and Water Vapor Profile Product MYD07_L2
consists of 30 gridded parameters related to atmospheric stability,
atmospheric temperature and moisture profiles, total atmospheric water
vapor, and total ozone. All of these parameters are produced for both
daytime and nighttime conditions at 5-km pixel resolution when at
least 9 FOVs are cloud free.
The atmospheric profiles are produced at 20 vertical atmospheric
levels (5., 10., 20., 30., 50., 70., 100., 150., 200., 250., 300.,
400., 500., 620., 700., 780., 850., 920., 950., 1000. mbar) The water
vapor parameter is an estimate of the total tropospheric column water
vapor made from integrated MODIS infrared retrievals of atmospheric
moisture profiles in clear scenes. The thermal band 9.6 micron is used
for retrieving total ozone burden.
The shortname for this Level-2 MODIS atmospheric profile product is
MYD07_L2 and the principal investigator for this product is MODIS
scientist Dr. Paul Menzel ( firstname.lastname@example.org).
The MODIS atmospheric profile (MYD07_L2) product contains data that
has a spatial resolution (pixel size) of 5 x 5 kilometers (at
nadir). Each MYD07_L2 product file covers a five-minute time interval,
which means the MYD07_L2 output grid is 270 5-km pixels in width and
406 5-km pixels in length for nine consecutive granules. Every tenth
granule has an output grid size of 270 by 408 pixels.
MYD07_L2 product files are stored in Hierarchical Data Format
(HDF-EOS). Twenty eight of the 30 gridded cloud parameters(5-kilometer
pixel resolution) are stored as Scientific Data Sets (SDS) within the
file, the remaining two algorithmic static parameters (band number and
presure level) are stored as Vdata(table arrays). Cloud Mask SDS,
derived from the 1-km MYD35_L2 Cloud Mask parameter, is remapped to
5-km resolution, by using only the center 1-km pixel in the 5x5 pixel
retrieval array. The remaining two (band number and static pressure
levels) are stored as Vdata(table arrays) Each file is roughly 28.3 MB
in size, and the total data volume is approximately 8.2 GB/day. For
browsing and extracting data from these files, some software are made
available at the site.
MYD07_L2 Data Group & Parameters
Spatial & Temporal Resolution:
Latitude & Longitude
Scan start time
Solar and Sensor Viewing Geometry:
Solar zenith & Solar azimuth angle
Sensor zenith & Sensor azimuth angle
Static Algorithm Parameters:
MODIS band number
twenty atmospheric pressure levels
Atmospheric & Surface Pressure:
Retrieved Geopotential Height Profile
Surface Elevation, Surface Pressure
Atmospheric & Surface Temperature:
Guess & Retrieved Temperature Profiles
Brightness Temperature, and Surface Temperature
Guess & Retrieved Moisture (Dew Point Temperature Profiles
Atmospheric Stability Indices:
Total Totals, Lifted Index, and K-index
Atmospheric Trace Gases:
Total Ozone Burden
Total Precipitable Water Vapor(IR)
Precipitable Water Vapor(Low & High )
Quality Assurance & Statistical Parameters:
Quality Assurance Parameters
QA Processing Flags for IR Water Vapor Retrieval
MODIS Cloud Mask
These parameters are very essential in the characterization of the
atmosphere, atmospheric correction of remotely sensed surface
parameters, and prediction of convective clouds and thunderstorms.
For more information about the MYD07_L2 product, visit the
MODIS-Atmosphere site at:
Access Collection 5 data set MYD07_L2 from the LAADS FTP server.
Data Set Citation
Menzel, P, Dr.
MODIS/Aqua Temperature and Water Vapor Profiles 5-Min L2 Swath 5km
Collection 004 and 005
Horizontal Resolution Range:
1 km - < 10 km or approximately .01 degree - < .09 degree
Temporal Resolution Range:
1 minute - < 1 hour
Available to public to gain familiarity with the data format and
gang.ye-1 at nasa.gov
paulm at ssec.wisc.edu
Space Science and Engineering Center
University of Wisconsin-Madison
1225 W. Dayton St.
Province or State:
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.
King, M.,Y. Kaufman, P. Menzel, D. Tanre, B. 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 clouds, aerosol and water vapor properties from the
Moderate Resolution Imaging Spectrometer (MODIS). IEEE
Trans. Geosci. Remote Sens., 30, 2-27.
Menzel, W. P., and L. E. Gumley, 1998: MODIS Atmospheric Profiles
Retrieval Algorithm Theoretical Basis Document. ATBD-MOD-07, NASA
Goddard Space Flight Center, pp.
Menzel, W. P.,and L. E. Gumley, 1997:MODIS Atmospheric Profiles ,in
MTPE EOS Data Products Handbook, pp 164-166.
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