# Presentation: 213573

## Land Summary 

- Current Emphases for MODLAND
- AQUA QA
- Product Outreach / Publication
- Validation
- Preparing for Collection 4

## Summary of Land Issues 1

- RSE MODLAND Special Edition Submitted (early Validation results)
- Galleys being reviewed
- End of Year Publication
- Land Outreach Workshops – a success – good outreach and feedback
- Landcover / Vegetation / Fire (Radiation Suite to come)
- Landcover hands-on session particularly useful
- Feedback ( HDF / Projection / EDG issues / Granule based data /Tools )
- Proposed Land Projection Change
- In response to user dissatisfaction with an unsupported ISIN projection – unmet expectations for ordering in different projections not realized
- Recognize no one projection suits all users – however ISIN appears to suit none – Goodes H. appears to be a major contender for a new projection (e.g. AVHRR Pathfinder)
**Least impact change to move to SIN projection for Collection 4** – will come up with SDST schedule impact assessment

## Summary of Land Issues 2

- New Era of large volume data sets
- Transitioning AVHRR users
- Points to **Urgent** need for improved tools and user service
- Reinvigorate EOSDIS relationship/support to image processing vendors
- SWGD Florida suggested workshop on tools – what happened?
- Assessment of available tools and a more visible guide to point users to the appropriate tools available around the community

## Summary of Land Issues 3

- Continuing to evaluate MODIS data usage
- Still early days / need better data
- Considering options to reduce archived products e.g. on-demand processing of Daily Fire Product
- Would welcome better communication between ST and Users
- Suggested a voluntary email list of MODIS DAAC users w. simple summary updates
- Hampered by privacy issue – slow progress on DAAC workarounds
- Chat room for MODIS Users
- Need to improve the Land / Water Mask
- BU considering various options – focus initially on problem areas
- Fast track schedule for collection 4 (URGENT)
- Longer term - Time for NASA to revisit EOS DEM WG (SRTM ?)
- CMG/IDS Data sets
- Examining pros and cons between CMG and recent IDS products
- Await Team Leader guidance on IDS Phase 2).

## Summary of Land Issues 4

- Developing MODIS Time – series  (awaiting first major reprocessing – Oct 02)
- AVHRR > MODIS
- need to help the community transition to MODIS quality
- data continuity a community
- MODIS > NPP
- We do not want to step back from MODIS even if the system is operational
- Operational systems will need to support climate measurements
- We encourage those involved to keep pressure on – the future of land remote sensing will depend heavily on long term science quality moderate resolution data
- We cannot afford to ignore the EOS data system lessons – keep data production close to the science community
- We must have a workable solution for generating, archiving Level 2 + products
- MODIS Validation is the pathfinder for NPP Product Validation
- Time to revisit deliverables for HQ MODIS Metrics for Land

## Summary of Land Issues 5

- Validation
- Land product validation in progress
- Benefits from internationalizing the product validation agenda (building on existing international structures)
- Global products – regional expertise
- Resource sharing
- Standards for products
- Better informed user community
- Proposed land product hierarchy may be of use to other disciplines

## Land Interpreted Definitions 

- Beta – the algorithm is running -  products being generated - QA initiated -  known problems exist  - algorithm changes being made - not ready for science use
- Provisional – QA acceptable  -  product looks reasonable – algorithm changes reduced –– Stage 1 validation in progress – science users beware
- Validated  - accuracy assessed and product uncertainty estimated as compared to independent data

## Validation “hierarchy”

- Stage 1 Validation – Product accuracy has been estimated using a small number of independent measurements from selected locations and time periods.
- Stage 2 Validation – Product accuracy has been assessed by a number of independent measurements, at a number of locations or times representative of the range of conditions portrayed by the product e.g. EOS Land Validation Core Sites, Fluxnet sites, Aeronet sites.
- Stage 3 Validation - Product accuracy has been assessed by independent measurements in a systematic and statistically robust way representing global conditions e.g. IGBP DISCover Project

## Land Product Validation Status 

- The Validation Hierarchy provides a more workable definition and recognizes validation as an iterative process
- Recognize that validation will mature as products are more broadly used
- Closure between validation studies will be needed
- At each stage it is implicit that:
- Results have been (peer reviewed) published – web visibility
- Associated validation data are made available
- All MODLAND Standard Products should be validated to Stage 2 i.e. validated over a range of conditions for which the product is provided
- For MODLAND the majority of products are already Validated at Stage 1
- Several products have Stage 2 Validation underway
- We recognize that only the Primary ESE products are likely to be resourced for Stage 3 Validation - these would also be  candidates for coordinated international effort e.g. through CEOS LPV
- We will need to make sure users are familiar with these definitions

## Validation Overview

- CEOS Land Product Validation activities
**Albedo/BRDF** validation meeting at BU, this fall
**LAI intercomparison**, still waiting for high res input
**Land cover** “programmatic article” in review, meeting planned at BU in late 2002/early 2003
**Fire/Burn scar** validation utilizing GOFC regional networks: ongoing work in  S. Africa (Roy), SE Asia (Elvidge), potential work in Siberia (Csiszar), Brazil, Mexico, Australia, US(?)
- Continued use of Core Sites, transition to “CEOS Land Product Validation” Core sites
- Initially: LAI-intercomparison, EOS Core Sites, and GOFC
- Subsetting and packaging data for Validation Sites
- Misc:
- Aqua validation – lack of coincident high resolution data
- LBA AVIRIS flight in 2003 (Huete)
- MODLAND group article on use of IKONOS submitted to special issue on scientific data purchase

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## In Summary 

- MODIS is an outstanding instrument with some excellent data products for land science
- Early days - but Aqua looks good for land science (except 1.6)
- good science support from MCST
- might consider bringing forward date for the generation of combined A/T products
- Data production has stabilized and is now sustained
- Largely due to the dedication of Ed Masuoka and SDST Staff and the GSFC DAAC
- Approaching 100% Global 250m production
- Keeping an eye on AQUA impact
- Collection 4 Land Reprocessing in October
- Emphasis shifting to data distribution and use  - not the envisioned role for the Science Team – although trying to help (IDS product, SCF generated special data sets, Tools)
- Need a different way of conducting business – responsive to large data volumes
- Data Management and Analysis Tools Critical to success
- Need to help broader range of users to be aware of the products and how to  utilize the data – science demonstration activities underway
- Need to be responsive to user needs – projection / products
- MODLAND has embraced the HQ request for improved outreach
- Land RR is engaging the operational and applications communities
- Need to move validation to a main stream activity
- For current and future products
- With our international partners  (CEOS LPV)