Land Product Validation subgroup activity

1

• Land Product Validation subgroup activity
• in support of
• LAI inter-comparison

2
overview

• Compile critical bibliography
• MODIS LAI-product distribution
• Continued communication
• Maintain participating site catalog

3
compile critical bibliography

• Web based
• Limited to the work directly related to
  validation of satellite derived LAI products
• Initial list started here

4
compile critical bibliography

• Topic biophysical
• Subtopic, lai
• AuthorMain,
• AuthorOthers
• Title,
• Journal,
• Source (person or place submitting entry),
• Keywords
• Date (year), Volume, Number, Page

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MODIS Land product distribution

• 200km by 200km subsets over all EOS Land
  Validation Core Sites(http//modis-land.gsfc.nasa
  .gov/val/coresite_gen.asp)
• 11km by 11km subsets over select FLUXNET sites
• Additional subsets possible (produced and
  ftp-transferred)
• Global products available through
  EDG(http//edcdaac.usgs.gov/modis/dataprod.html)

6
continued communication

• One of the results of this meeting should be a
  method for continued interaction
• Protocol documentation as near-term objective
• Joint proposals / financial support could help
  future international quantitative efforts

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continued communication, cont.

• Interaction with IGOS TCO theme
• Input from TCO meeting (Ojima, Plummer, et al.)
• Saturation at LAI gt 6 is an issue
• Seasonality/time-series is critical
• LAI is used a model constraint, not imput
• Uncertainty estimates could be incorporated into
  modeling

8
site catalog
current
planned
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(No Transcript)
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CEOS Land Product Validation Core Sites

• Potential joint project with CEOS Working Group
  on Information Systems and Services (WGISS) being
  led by the LPV
• Easy-access web-based access to land products
  from CEOS members could include LAI from
  multiple sensors.

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Data Compilation for Land Validation Core Sites
SATELLITE DATA from various CEOS Member
sensors, subsetted over the site and WWW
accessible.
Ancillary/GIS Layers such as - elevation
- land cover - reference layer (with
political boundaries, airports, water
bodies) Scientific Networks such as AERONET
and FLUXNET data ILTERs
Field and airborne data WWW accessible
Graphic courtesy of the BigFoot program
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Distribution of Sites
EOS (NASA)
VALERI (CNES)
( both EOS and VALERI)
VALERI (EC?)
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EOS Core Sites infrastructure as example
EDC DAAC MODIS, ETM, ASTER SeaWiFS subsets at
GSFC Ancillary data at Umd Field data
locally maintained
EOS Core Site web page provides link to on-line
ftp directories
ORNL Mercury system Archive and access of field
data
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WGCV/WGISS conceptual interaction

• WGCV
• site locations and data set requirements,
• negotiate subsetting and on-line storage of core
  site data
• some correlative analysis on these data, and
• interpretation of possible discrepancies between
  products

WGISS provide seamless internet-based access to
the multiple data sets
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WGCV/WGISS Example
MERIS and AATSR Validation Team (MAVT) Subset and
place on-line MERIS surface reflectance for Core
Sites
WGISS Provides single file with MODIS/MERIS
surface reflectance as multi-layer product
MODIS Land Validation Team (MLVT) Subset and
place on-line MODIS surface reflectance for Core
Sites
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Action Items/Wrap-up

• Presenters to provide electronic copy and any
  related bibliography to Morisette
• Morisette to post presentations on LAI page
• Baret to prepare summary of a.m. discussion, and
  forward to Morisette
• Privette, Morisette, Weiss and Baret to prepare
  Earth Observer article and ESA EO 1/4ly.
• Gower to start outline for LAI validation
  guideline article (authorLPV contributing
  authors listed in table alphabetically)Deadline
  before CEOS plenary, November 2001
• Morisette to keep group informed on the outcome
  of CEOS Land Validation Core Sites
• Myneni/BU to provide user support for MODIS LAI
  product-subset tool, et al.
• VALERI, BigFoot, CCRS to provide access to
  high-res LAI maps or field data
• Gower, Privette, Morisette to revisit global
  representationfill gaps
• Privette to write GOFC or TCO requesting delegate
  on LPV (Baret)
• Next meeting or steps