A CEOS Land Product Validation topical workshop:
Validation of global vegetation indices and their time series

    August 7, 2006

This one-day international workshop, preceding the Global Vegetation Monitoring workshop August 8-10th, will bring together both producers and users of global vegetation index time series data to assess the current state of their accuracy and methods used to quantify the uncertainties in seasonal/phenology metrics and long-term land surface process studies.

The workshop will allow researchers to review current validation strategies in the context of multi-sensor analysis to assess data continuity and proper use and interpretation of vegetation indices within both the scientific and application communities.

A discussion to reach consensus on:

  • necessary properties of the satellite data for detection of long-term conditions
  • directions for new advanced or enhanced VI, with respect to the long-term NDVI record
  • appropriate data processing techniques/algorithms for the development of seamless, continuous long term moderate resolution VI products
  • accuracies necessary to detect critical phenomena
The outcome will be a well-structured outline for a report detailing the consensus opinion of the workshop participants pertaining to these issues. Individuals will be assigned to lead the various sections and the compilation of the document.

        

Proposed agenda:

7:30 – 8:30 Registration & Continental Breakfast

8:30 – 9:00 CEOS Land Product Validation & Workshop objectives - Morisette
(Overview of validation definitions and procedures)
Download this PowerPoint

9:00 – 10:40 Presentation on existing validation efforts

10:40 – 11:00 break

11:00 -12:00 New opportunities for VI validation

12:00 – 12:30 Discussion

12:30 – 2:00 Lunch

2:00 – 3:45 User’s perspective: VI sensitivity analysis
How the data are used, limitations of available data sets, and future opportunities

3:45– 4:00 Break

4:00 – 5:00 Discussion on VI climate data records (to reach consensus on ...)
  • Required properties of the satellite data for detection of long-term conditions
  • Role of new advanced or enhanced VI, with respect to the long-term NDVI record.
  • Appropriate data processing techniques/algorithms for the development of seamless, continuous long-term moderate resolution VI products
  • Required accuracies to detect critical phenomena
Download PowerPoint of preliminary recommendations
(Notes from meeting's discussion session taken by J. Morisette)