CEOS WGCV Subgroup on Land Product Validation LPV June 01 Status Report

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CEOS WGCV Subgroup onLand Product Validation
(LPV)June 01 Status Report

• Jeffrey L. Privette, NASAs GSFC
• Jeffrey Morisette, SSAI/GSFC

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Foci of Last 6 Months

• Organizing Year 2001 Topical Workshops
• LAI
• Fires/Burn Scars
• Land Cover
• Initial emphasis on coarse-resolution (1 km)
  sensors
• Linking various international Test Site
  networks
• Acquiring Remote Sensing Data over Test Sites
• Operational (EOS) and Tasked (e.g., Spot Img.,
  Landsat)
• Formalizing relationship with GOFC
• Outreach

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Topic 1Biophysical Parameters

• Initial Focus Leaf Area Index and FPAR
• MODIS product released in August, 2000
• First and only operational LAI/FPAR product to
  date
• Forthcoming GLI, MISR, MERIS (VI-derived)
• Informal Meetings
• May 00 (Ispra), Jan. 01 (ISPRS/Aussois), Jan
  01 (MODIS Sci. Team Mtg., Washington)
• Major validation projects afoot
• VALERI, BigFoot, Canadian Network, SAVE

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LAI Product Evaluation

• 12-18 month pathfinder
• Shake-out for more rigorous, longer-term and
  multiproduct comparisons
• Evaluation of operational and research products
• Leverage Year 2000 field campaigns (24)
• 1st Workshop Frascati, June 6-7, 2001
• Early evaluation of MODIS LAI (vs. historical)
• Draft field protocols (WWW posting and sign-on)
• 23 participants

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LAI Product Evaluation Sites

LAI and satellite data collected in Year 2000
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LAI Product Evaluation Scaling
VALERI (Baret et al.)
SPOT image of the Romilly VALERI site (Red XS3,
Green XS1, Blue XS2). Right the local LAI2000
measurements (the stars) organized along a 20m
long cross. The vertical lines represent the row
direction.
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MODIS LAI Test Sites on IGBP Kalahari Transect
Courtesy Y. Tian
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Validation of MODIS Green LAI in Africa
Mean Error - 0.07 Std. Dev. 0.23
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Topic 2.Fire Products

• Characterization and intercomparison of Active
  Fire products
• DMSP, AVHRR, ATSR, MODIS, GOES
• Comparison with ground based fire data bases
• Development of a network of representative long
  term Fire Validation sites
• Field protocols for data collection for Burned
  Area validation using high resolution data
• ATSR, MODIS, AVHRR
• GOFC Miombo Network pathfinding activity
• 1st Workshop Lisbon, 9-12 July 2001
• Pereira, Morisette/Justice

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Topic 3.Land Cover Products

• Focus on global land cover classification,
  continuous fields and land cover change products
• AVHRR,VEGETATION, MODIS, ATSR, GLI, VIIRS
• Builds on DISCover Validation approach and
  activity
• Use of high resolution data for validating global
  products
• Landsat/SPOT
• IKONOS
• Seeking convener of a 2001 workshop
• (Skole/Gunawan/Belward/Townshend/Strahler)

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Linking International Test Site Networks Future
Blueprint
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Linking International Test Site Networks
Current Status

• Networks
• Canadian LAI network (11 sites)
• European VALERI (6 sites)
• EOS Land Validation Core Sites (23 sites)
• Mission-specific networks (e.g. ASTER)
• LPSIM Site Inventory (comprehensive list)
• WGCV test site dossier (65)
• Activities
• DISCover Global Land Cover Validation
• CSIRO ASTER Validation (Prata/Hook)

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Acquiring Remote Sensing Data over Test Sites
SATELLITE DATA Multiple sensors, various
scales, 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
Field and airborne data WWW accessible
Graphic courtesy of the BigFoot program
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Formalizing Relationship With GOFC

• GOFC Objective improve operational monitoring of
  surface from a carbon perspective
• All land cover types
• Part of the Global Terrestrial Observing System
  (GTOS)
• GOFC themes
• Biophysical Parameters (LAI/FPAR/NPP)
• Fire
• Land cover
• Providing validated products is a high priority
  for GOFC
• Provides initial programmatic focus for LPV
  activities
• emphasis on moderate resolution, level 2 and 3
  products
• LPV participating in GOFCs 2nd STB Meeting
  (Frascati, following WGCV-18)

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Outreach

• EOS Earth Observer Articles
• Dialogue with NPOESS Preparatory Project (NPP)
  VIIRS Calibration/Validation Lead
• WGCV LPV written into NPP Val. Plan
• MODIS Science Team Meeting (Land, Jan 01)
• IKONOS Validation Workshop (April 01)
• Discussions with GOFC STB Co-Chair Fire Lead
• Remote Sensing and GIS Accuracy Assessment
  Conference (US EPA, December 01)
• Starting dialogue with MERIS Land Validation
  members

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The Logo Effort

• Themes
• Satellite Validation
• Higher Level Products
• Field Measurements
• Scaling

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Next Steps (Near Term)

• Links with Calibration Test Sites
• Critial Assessment of Global Test Site Network
• More than a collection of member-organization
  backyards?
• Statistical credibility, representivity, size,
  scheduling
• Additions/modifications
• Future Topical Workshops
• GOFC Biomass estimation accuracy (incl. VCL,
  SAR)
• Albedo / BRDF (combined with annual BRDF meeting)
• Snow cover/available water
• Actively reviewing of the NPP/NPOESS Validation
  Plan
• VIIRS sensor is follow-on AVHRR/MODIS 20-year
  series lifetime
• Land Product Validation Core Bibliography
• Key articles, from recommendations of topical
  meetings
• Memo to NASA Continuance of EOS Validation
  Program