Left: A combination of Bands
2, 2, 1 displays a false-color
Surface Reflectance image using 250-m data acquired between April 7 - 14,
2007 over central Europe (h18v04). The
Alps are prominent snow-covered features, appearing in white across the
center of the image.
Below: Highlighted below is the top left corner of Tile h18v04, detailing the
confluence of the Seine River and the English Channel.
Data Set Characteristics:
Area: ~10 degrees x 10 degrees lat/long
File Size: ~55 MB
Projection: Sinusoidal
Data Format: HDF-EOS
Dimensions: 4800 x 4800 rows/columns
Resolution: 250 meters
Science Data Sets (SDS HDF Layers): 3
V005 Change Points of Interest:
Reduced file volume: internal compression
Improved aerosol retrieval
Product Description
The
MODIS Surface Reflectance products provide an estimate of the surface
spectral reflectance as it would be measured at ground level in the absence
of atmospheric scattering or absorption. Low-level data are corrected for atmospheric gases and aerosols,
yielding a level-2 basis for several higher-order gridded level-2 (L2G) and
level-3 products.
MYD09Q1
provides Bands 1 and 2 at 250-meter resolution in an 8-day gridded level-3
product in the Sinusoidal projection. Each MYD09Q1 pixel contains the best possible L2G observation during
an 8-day period as selected on the basis of high observation coverage, low
view angle, the absence of clouds or cloud shadow, and aerosol loading. Science Data Sets provided for this
product include reflectance values for Bands 1 and 2, and a quality rating.
Version-5 MODIS/Aqua Surface Reflectance products are Validated Stage 1, meaning that accuracy has been estimated using a small number of independent measurements obtained from selected locations and time periods and ground-truth/field program efforts. Although there may be later improved versions, these data are ready for use in scientific publications
LP DAAC User Services
U.S. Geological Survey (USGS)
Earth Resources Observation and Science Center (EROS)
47914 252nd Street
Sioux Falls, SD 57198-0001