Welcome to the CEOS/WGCV Land Product Validation Subgroup Web Site!

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The 2nd International Workshop on the Validation of Satellite-based Land Surface Phenology Products, Milwaukee, Wisconsin, USA, Sep 14, 2012.

Phenology 2012 Conference, Milwaukee, Wisconsin, USA, Sep 10-13, 2012.

2nd TERRABITES Symposium, ESA-ESRIN, Frascati, Italy, Feb 6-8, 2012. Registration Deadline 25 January 2012

CEOS WGCV 34th Plenary meeting, Brisbane, Australia, Feb 6-10, 2012.

Special Interest Group - Thermal Remote Sensing , Frascati, Italy, Dec 7-9, 2011.

QA4EO Workshop on Providing Harmonised Quality Information in EO Data by 2015, 18-20 October 2011. Website and registration.

SMAP Applications Workshop #2, Washington, DC, October 12-13, 2011.

iLEAPS 3rd Science Conference, 18-23 September 2011, Garmisch-Partenkirchen, Germany. Abstracts due 15 April.

CEOS WGCV 33rd plenary meeting, Moscow, Russia. 17-20 May 2011.

The LPV Soil Moisture Focus Group will hold a joint meeting May 5, 2011 in Oxnard, CA.

ISRSE 34, including special session on ground networks. 10-15 April 2011, Sydney, Australia.

EGU General Assembly 2011, April 3-8, Vienna, Austria. See also, Seasons and phenology session.

Sentinel4Science: Assessment and Consolidation Workshop. 22-24 March 2011, ESA Frascati, Italy.

Land Surface Analysis SAF - 2010 User workshop, 15-17 Nov, Toulouse, France.

ESA-iLEAPS-EGU: Earth observation for land-atmosphere interaction science, 3-5 Nov, Frascati, Italy.

Symposium - RAQRS'III, Sep/Oct 2010, Valencia, Spain.

A Workshop on the validation of land surface phenology products, Dublin, Ireland, June 2010.

International Soil Moisture Network web site.

PIERS2010 Special session on Land Products, Xi'an, China, Mar 2010.

Download the Quality Assurance Framework for Earth Observation (QA4EO) guide.

Minutes of WGCV-32

WGCV report CEOS-24

LPV Core Sites
Cal/Val Portal

LPV subgroup focus area mailing lists.
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How to use these mailing lists

Link to current

LPV is a subgroup of the Working Group on Calibration and Validation

WGCV is a standing Working Group of the Committee on Earth Observation Satellites

The value of satellite derived land products for science applications and research is dependent upon the known accuracy of the data. The Committee on Earth Observation Satellites (CEOS), the space arm of the Group on Earth Observations (GEO), plays a key role in coordinating the land product validation process. The Land Product Validation (LPV) sub-group of the CEOS Working Group on Calibration and Validation (WGCV) aims to address the challenges associated with the validation of global land products. The LPV subgroup activities are divided up into 8 focus areas related to product families; biophysical, surface radiation/albedo, fire/burn scar detection, land cover mapping, land surface temperature/emissivity, soil moisture, snow and phenology.

LPV Terms of Reference

Provide the interface between the user community, product developers, CEOS and GEO in relation to product validation requirements, measurement standards and definitions for current and future missions
Develop CEOS-endorsed community consensus “best practice” protocols for land product validation, data collection, analysis and accuracy reporting
Identify and support global core sites for both systematic and episodic measurements of land surface properties via tower measurements, field campaigns, use of ground and near-surface sensors (with IVOS and WGISS)
Contribute to satellite land product inter-comparison activities
Develop procedures for validation data exchange and management

Validation is the process of assessing, by independent means, the quality of the data products derived from the system outputs

A hierarchical approach to classify land product validation stages was adopted by CEOS through consensus of the LPV community in 2003 and revised in 2009.

Stage 1 Validation	Product accuracy is assessed from a small (typically < 30) set of locations and time periods by comparison with in-situ or other suitable reference data.
Stage 2 Validation	Product accuracy is estimated over a significant set of locations and time periods by comparison with reference in situ or other suitable reference data. Spatial and temporal consistency of the product and with similar products has been evaluated over globally representative locations and time periods. Results are published in the peer-reviewed literature.
Stage 3 Validation	Uncertainties in the product and its associated structure are well quantified from comparison with reference in situ or other suitable reference data. Uncertainties are characterized in a statistically robust way over multiple locations and time periods representing global conditions. Spatial and temporal consistency of the product and with similar products has been evaluated over globally representative locations and periods. Results are published in the peer-reviewed literature.
Stage 4 Validation	Validation results for stage 3 are systematically updated when new product versions are released and as the time-series expands.

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Curator: Jaime Nickeson
NASA Official: Robert Wolfe
Last Updated: April 5, 2012