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.
MOD09Q1 provides Bands 1 and 2 at 250-meter resolution in an 8-day gridded level-3 product in the Sinusoidal projection. Each MOD09Q1 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 assurance rating.
Collection-5 MODIS/Terra Surface Reflectance products are Validated Stage 2, meaning that accuracy has been assessed over a widely distributed set of locations and time periods via several ground-truth and validation efforts. Although there may be later improved versions, these data are ready for use in scientific publications.
||MODIS Collection 6.1 - Level 1, Atmosphere, Land (ArchiveSet 61)
|File Naming Convention:
- YYYYDDD = Year and Day of Year of acquisition
- hHH = Horizontal tile number (0-35)
- vVV = Vertical tile number (0-17)
- CCC = Collection number
- YYYYDDDHHMMSS = Production Date and Time
||Vermote - NASA GSFC and MODAPS SIPS - NASA. (2015). MOD09Q1 MODIS/Terra Surface Reflectance 8-Day L3 Global 250m SIN Grid. NASA LP DAAC. http://doi.org/10.5067/MODIS/MOD09Q1.006
||Climate Change, Atmospheric Correction, Aerosol Optical Depth/Thickness, Reflectance