# Presentation: 251766

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

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

## overview	

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

## compile critical bibliography 

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

## compile critical bibliography 

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

## 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)

## 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

## continued communication, cont.

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

## site catalog	

-  current

-  planned

## Slide 9

## 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.

## 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*

**Data Compilation for ****Land Validation Core Sites**

## Distribution of Sites

- EOS (NASA)

- VALERI (CNES)

- VALERI (EC?)

**Distribution of Sites**

- (     both EOS and VALERI)

## EOS Core Sites infrastructure as example

**EOS Core Site web page ****provides link to on-line ftp directories**

**EDC DAAC:**
**MODIS, ETM+, ****ASTER**
**SeaWiFS subsets**
**at GSFC**
**Ancillary data**
**at Umd**
**...**
**Field data **
**“****locally” maintained**

**ORNL Mercury system:**
**Archive and access of**
**field data**

## WGCV/WGISS conceptual interaction

**WGISS:**
**provide seamless internet-based access to the multiple data sets**

**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**** **

## WGCV/WGISS Example

**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**

**MERIS and AATSR Validation Team (MAVT)**
**Subset and place on-line MERIS surface reflectance for Core Sites**

## 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 (author=“LPV” 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 representation–fill gaps
**Privette **to write GOFC or TCO requesting delegate on LPV (Baret)
- Next meeting or steps