The
above image was created by reprojecting Bands 1, 4, 3 from the MOD09GA
product from their native Sinusoidal to Universal Transverse Mercator
(UTM) coordinates using the MODIS Reprojection Tool (MRT).� The
data were acquired September 12, 2000 across the red rocks region of
Southeastern Utah down through the heart of New Mexico (h09v06).
Data Set Characteristics:
Area: ~10 degrees x 10 degrees lat/long
File Size: ~85 MB
Projection: Sinusoidal
Data Format: HDF-EOS
Data Group 1 kilometer:
Dimensions: 1200 x 1200 rows/columns
Resolution: 1000 meters
Science Data Sets (SDS HDF Layers): 9
Data Group 500 meter:
Dimensions: 2400 x 2400 rows/columns
Resolution: 500 meters
Science Data Sets (SDS HDF Layers): 12
This subset of the
image above details Lake Powell and Lake Mead in the Glen Canyon National
Recreation Area.�
V005 Change Points of Interest:
Reduced number of data products:� MOD09GST, MOD09GHK, MODMGGAD, MODPT1KD, MODPTHKM encapsulated within MOD09GA
Revised methodology for choosing first layer observation
Reduced file volume:� internal compression
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.
MOD09GA provides Bands
1-7 in a daily gridded L2G product in the Sinusoidal projection,
including 500-meter reflectance values and 1-kilometer observation and
geolocation statistics.� 500-m Science Data Sets provided for this product
include reflectance for Bands 1-7, a quality rating, observation coverage,
observation number, and 250-m scan information. 1-kilometer Science
Data Sets provided include number of observations, quality state, sensor
angles, solar angles, geolocation flags, and orbit pointers.
Version-5
MODIS/Terra Surface Reflectance products are validated, meaning that
product uncertainties are well defined over a range of representative
conditions. 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