surface reflectance product
Although Surface Reflectance can be processed only from the Operational Land Imager (OLI) bands, SR requires combined OLI/Thermal Infrared Sensor (TIRS) product (LC8) input in order to generate the accompanying cloud mask. All LAADS Land Surface Reflectance data products are accessible via the LAADS product search page. The SR algorithm produces directional surface reflectance values for Visible Infrared Imaging Radiometer Suite (VIIRS) band centered at 0.412 µm, 0.445 µm, 0.488 µm, 0.555 µm, 0.645 µm, 0.672 µm, 0.865 µm (two different spatial resolutions), 1.24 µm, 1.61 µm (two different spatial resolutions), and 2.25 µm. %���� Planet uses the 6S atmospheric radiative transfer model with ancillary data from MODIS to account for atmospheric effects on the observed signal at the sensor for the PlanetScope Dove constellation. scattering or absorption. Therefore, OLI only (LO8), and TIRS only (LT8) data products cannot be calculated to SR. << /Type /XRef /Length 85 /Filter /FlateDecode /DecodeParms << /Columns 4 /Predictor 12 >> /W [ 1 2 1 ] /Index [ 61 48 ] /Info 80 0 R /Root 63 0 R /Size 109 /Prev 1521759 /ID [<104a1e1b94cf10b8bd26f83fab73d732><104a1e1b94cf10b8bd26f83fab73d732>] >> The Landsat 8 Collection 1 Land Surface Reflectance Code (LaSRC) Product Guide describes the LaSRC algorithm and the Landsat 8 Surface Reflectance data products created from it. endobj Provided along with the 500 m reflectance and four observation bands are a set of nine 1 km observation bands. Landsat Surface Reflectance measures the fraction of incoming solar radiation reflected from Earth's surface to the Landsat sensor. Please copy and save the token below for use with any support LAADS download utilities or scripts. To view imagery from the operational GOES East (GOES-16) and GOES West (GOES-17) satellites, users may visit https://www.star.nesdis.noaa.gov/goes/. Please copy and save the token below for use with any support LAADS download utilities or scripts. << /Filter /FlateDecode /S 225 /Length 222 >> http://doi.org/10.5067/MODIS/MOD09A1.006, Climate Change, Atmospheric Correction, Aerosol Optical Depth/Thickness, Reflectance. %PDF-1.5 It is a ratio of surface radiance to surface irradiance, and as such is unitless, and typically has values between 0 and 1. Further spatial and temporal aggregation to 500 m and 1 km grids over daily or 8-day 64 0 obj The MOD09GA Version 6 product provides an estimate of the surface spectral reflectance of Terra MODIS Bands 1-7 corrected for atmospheric conditions such as gasses, aerosols, and Rayleigh scattering. EE supports the searching of satellite, aircraft, and other remote sensing inventories through interactive and textual-based query capabilities. Technical information about Collection 2 Surface Reflectance including algorithms, documentation, data access, and data tools. Surface Reflectance is available for all orthorectified scenes produced by radiometrically calibrated sun-synchronous orbit Dove and RapidEye satellites. VIIRS Surface Reflectance Product. Who are the intended users of Surface Reflectance products? << /Linearized 1 /L 1522393 /H [ 923 302 ] /O 65 /E 56998 /N 18 /T 1521758 >> 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, M11. The requirements provide continuity to the Moderate Resolution Imaging Spectroradiometer (MODIS) and the Advanced Very High Resolution Radiometer (AVHRR) surface reflectance data records. Low-level data are corrected for atmospheric gases and aerosols, yielding a level-2 basis for several higher-order gridded products. 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. 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. Explore More Science. spectral wavelengths that is reflected from Earth’s land surface. Low-level data are corrected for atmospheric gases and aerosols, yielding a level-2 basis for several higher-order gridded products. 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. 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. 63 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. MOD09A1.AYYYYDDD.hHHvVV.CCC.YYYYDDDHHMMSS.hdf, Eric Vermote - NASA GSFC and MODAPS SIPS - NASA. To test, run the following wget download command in your terminal and see if it successfully downloaded the README text file located at the root of the LAADS archive. (2015). 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. All products are output in netCDF-4. Date added: Wednesday, August 5, 2020. The Surface Reflectance EDR algorithm is designed to contain four main subroutines: Extract inputs, Quality Flags, Surface Reflectance Retrieval and Write Surface Reflectance EDR. 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. The MOD09GA Version 6 product provides an estimate of the surface spectral reflectance of Terra MODIS Bands 1-7 corrected for atmospheric conditions such as gasses, aerosols, and Rayleigh scattering. endstream The SNPP VIIRS Surface Reflectance products contain fractions of incoming radiation at particular endobj x�cbd�g`b`8 $�'�X�@�QH0Y ��@Bz?��1�SA��@�gqH(��' � �&��J��101j-��8H ]�� 62 0 obj stream Please confirm before starting this batch download of listed below totaling , one file at a time. stream Surface reflectances for each pixel in the M-bands (750 m) and I-bands (375 m) are retrieved separately Details. As part of that role, staff at the USGS Earth Resources Observation and Science (EROS) Center created this true color composite image. The spectral and spatial characteristics of the MODIS sensor are generally similar to the spectral and spatial requirements of the VIIRS sensor. endobj The image was created using Provisional Surface Reflectance data, Geographic Names Information System (GNIS), Mapping, Remote Sensing, and Geospatial Data, Earth Resources Observation and Science (EROS) Center, Landsat 4-7 Collection 1 Surface Reflectance Code LEDAPS Product Guide, Landsat 8 Collection 1 Land Surface Reflectance Code Product Guide, EROS Science Processing Architecture On Demand Interface User Guide, USGS Earth Resources Observation and Science (EROS) Center Science Processing Architecture (ESPA) On Demand Interface, Chesapeake Bay: A Landsat 8 Surface Reflectance Mosaic. The EarthExplorer (EE) user interface is an online search, discovery, and ordering tool developed by the United States Geological Survey (USGS). A pixel composite When is the Surface Reflectance product available? 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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