The Surface Reflectance EDR algorithm is designed to contain four main subroutines: Extract inputs, Quality Flags, Surface Reflectance Retrieval and Write Surface Reflectance EDR. 66 0 obj To avoid a new download prompt for each file, ensure the following settings are configured in your browser: Click checkbox “Do this automatically for files like this from now on”, Unsupported browsers for multi-file downloads (use, YYYYDDD = Year and Day of Year of acquisition, Level-1 and Atmosphere Archive & Distribution System. Provided along with the 500 m reflectance and four observation bands are a set of nine 1 km observation bands. MOD09A1 MODIS/Terra Surface Reflectance 8-Day L3 Global 500m SIN Grid. Products to support land surface change studies. 65 0 obj 64 0 obj spectral wavelengths that is reflected from Earth’s land surface. The geomedian is a synthetic value as opposed to an actual observation, and is the high dimensional median of all reflectance bands of the source dataset for each year. Each MOD09A1 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. Surface reflectances for each pixel in the M-bands (750 m) and I-bands (375 m) are retrieved separately Therefore, OLI only (LO8), and TIRS only (LT8) data products cannot be calculated to SR. The Himawari-8 AHI surface reflectance product is part of our GeoNEX land products, which integrate level 2 and higher remote sensing data from a set of geostationary satellite sensors (i.e. stream Visit the Landsat Surface Reflectance page for more information. Collection 2 Level-1 and Level-2 sample data products are available for download from the Landsat Sample Products page. The surface-reflectance product is the input for product generation for several land products: vegetation Indices (VIs), Bidirectional Reflectance Distribution Function (BRDF), thermal anomaly, snow/ice, and Fraction of Photosynthetically Active Radiation/Leaf Area Index (FPAR/LAI). The Surface Reflectance (SR) Product is derived from the standard Planet Analytic (Radiance) Product and is processed to top of atmosphere reflectance and then atmospherically corrected to (bottom of atmosphere or) surface reflectance. x�c```b``����� ^� � `6+��r��A�QXIP�`�C�����b8CM{�y�C�Ϛ ޺��j��D�;\�~{fdey�l��m�'����z'�$/Ԋ������3�eeN��D�7#���~(:����Hh)P�����h� =`� �'���X��|����p��K�l�d`h������ Tx�f2���@� -_� Collection 2 will become available in mid-2020. In the 8-day product, each surface reflectance pixel contains the best possible L2G observation during an 8-day period as selected on the basis of high observation coverage, Surface reflectance is generated from Level-1 inputs that meet the <76 degrees Solar Zenith Angle constraint and include the required auxiliary data inputs to generate a scientifically viable product. << /Linearized 1 /L 1522393 /H [ 923 302 ] /O 65 /E 56998 /N 18 /T 1521758 >> VIIRS Surface Reflectance Product. endobj The USGS provides scientific information to help manage this vital ecosystem. endobj The Surface Reflectance (SR) Product is derived from the standard Planet Analytic (Radiance) Product and is processed to top of atmosphere reflectance and then atmospherically corrected to (bottom of atmosphere or) surface reflectance. A Harmonized Surface Reflectance Product Landsat and Sentinel-2 data represent the most widely accessible moderate-to-high spatial resolution multispectral satellite measurement. 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. It is a ratio of surface radiance to surface irradiance, and as such is unitless, and typically has values between 0 and 1. The VIIRS Surface Reflectance (SR) product is generated from a combination of the VIIRS SDR and geolocations provided via the IDPS, and Global Forecast System (GFS), aerosol, cloud mask, and cloud height products available through the NDE.

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