HR: 10:50h
AN: U32A-03    [Abstracts]
TI: Generating a Long-term Land Data Record from the AVHRR and MODIS Instruments
AU: * Pedelty, J
EM: Jeff.Pedelty@nasa.gov
AF: NASA's Goddard Space Flight Center, Laboratory for Hydrospheric and Biospheric Sciences, Greenbelt, MD 20771, United States
AU: Vermote, E
EM: eric@ltdri.org
AF: University of Maryland, Department of Geography 2181 LeFrak Hall, College Park, MD 20742, United States
AU: Devadiga, S
EM: devadiga@ltpmail.gsfc.nasa.gov
AF: NASA's Goddard Space Flight Center, Laboratory for Hydrospheric and Biospheric Sciences, Greenbelt, MD 20771, United States
AU: Roy, D
EM: david.roy@sdstate.edu
AF: South Dakota State University, Geographic Information Science Center of Excellence Wecota Hall, Box 506B, Brookings, SD 57007, United States
AU: Schaaf, C
EM: schaaf@bu.edu
AF: Boston University, Department of Geography and Environment 675 Commonwealth Avenue, Boston, MD 02215, United States
AU: Privette, J
EM: Jeff.Privette@noaa.gov
AF: NOAA National Climatic Data Center, Federal Building 151 Patton Avenue, Asheville, NC 28801, United States
AU: Pinheiro, A
EM: ana.pinheiro@noaa.gov
AF: NOAA National Climatic Data Center, Federal Building 151 Patton Avenue, Asheville, NC 28801, United States
AU: Prince, S
EM: sprince@geog.umd.edu
AF: University of Maryland, Department of Geography 2181 LeFrak Hall, College Park, MD 20742, United States
AU: Justice, C
EM: cjustice@umd.edu
AF: University of Maryland, Department of Geography 2181 LeFrak Hall, College Park, MD 20742, United States
AU: Nagol, J
EM: jnagol@geog.umd.edu
AF: University of Maryland, Department of Geography 2181 LeFrak Hall, College Park, MD 20742, United States
AU: Masuoka, E
EM: Edward.J.Masuoka@nasa.gov
AF: NASA's Goddard Space Flight Center, Laboratory for Hydrospheric and Biospheric Sciences, Greenbelt, MD 20771, United States
AU: Brown, M
EM: Molly.E.Brown@nasa.gov
AF: NASA's Goddard Space Flight Center, Laboratory for Hydrospheric and Biospheric Sciences, Greenbelt, MD 20771, United States
AU: Pinzon, J
EM: Jorge.E.Pinzon@nasa.gov
AF: NASA's Goddard Space Flight Center, Laboratory for Hydrospheric and Biospheric Sciences, Greenbelt, MD 20771, United States
AU: Tucker, C
EM: Compton.J.Tucker@nasa.gov
AF: NASA's Goddard Space Flight Center, Laboratory for Hydrospheric and Biospheric Sciences, Greenbelt, MD 20771, United States
AU: Ju, J
EM: Junchang.Ju@sdstate.edu
AF: South Dakota State University, Geographic Information Science Center of Excellence Wecota Hall, Box 506B, Brookings, SD 57007, United States
AU: Liu, J
EM: jcliu@bu.edu
AF: Boston University, Department of Geography and Environment 675 Commonwealth Avenue, Boston, MD 02215, United States
AB: The goal of the Land Long Term Data Record (LTDR) project is to produce a consistent long term data set from the Advanced Very High Resolution Radiometer (AVHRR) and the Moderate Resolution Imaging Spectroradiometer (MODIS) instruments for use in global change and climate studies. The project is prototyping the development and production of a climate quality data record (CDR). LTDR will create daily surface reflectance and normalized difference vegetation index (NDVI) products at a resolution of 0.05°, which is identical to the Climate Modeling Grid (CMG) used for MODIS products from the EOS Terra and Aqua satellites. The AVHRR data begin in June 1981, while the MODIS data start in March 2000 (Terra) and April 2002 (Aqua). The combination of AVHRR and MODIS data will enable the creation of a 26-year data set (1981 - present). The MODIS data record will be extended by the planned Visible/Infrared Imager/Radiometer Suite (VIIRS) instrument on the NPOESS Preparatory Project (NPP) due for launch in 2009. This long-term data record should continue indefinitely. Higher order products such as burned area, land surface temperature, albedo, bidirectional reflectance distribution function (BRDF) correction, leaf area index (LAI), and fraction of photosynthetically active radiation absorbed by vegetation (fPAR), will be created. The LTDR project will reprocess Global Area Coverage (GAC) data from AVHRR sensors onboard NOAA satellites by applying the preprocessing improvements identified in the AVHRR Pathfinder II project and atmospheric and BRDF corrections used in MODIS processing. The preprocessing improvements include radiometric in-flight vicarious calibration for the visible and near infrared channels and inverse navigation to relate an Earth location to each sensor instantaneous field of view (IFOV). Atmospheric corrections for Rayleigh scattering, ozone, and water vapor are undertaken, with aerosol correction being implemented. The LTDR also produces a surface reflectance product for channel 3 (3.75 μ m). Quality assessment (QA) is an integral part of the LTDR production system, which is monitoring temporal trends in the AVHRR products using time-series approaches developed for MODIS land product quality assessment. The land surface reflectance products have been evaluated at AERONET sites. The AVHRR data record from LTDR is also being compared to products from the PAL (Pathfinder AVHRR Land) and GIMMS (Global Inventory Modeling and Mapping Studies) systems to assess the relative merits of this reprocessing vis-à-vis these existing data products. The LTDR products and associated information can be found at http://ltdr.nascom.nasa.gov/ltdr/ltdr.html.
UR: http://ltdr.nascom.nasa.gov/ltdr/ltdr.html
DE: 0434 Data sets
DE: 0480 Remote sensing
SC: Union [U]
MN: 2007 Fall Meeting