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CEOS Cal Val Test Site - Dunhuang, China - Instrumented Site

Entry ID: CEOS_CalVal_Test_Site-Dunhuang-China

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Summary

Abstract: On the background of these requirements for sensor calibration, intercalibration and product validation, the subgroup on Calibration and Validation of the Committee on Earth Observing System (CEOS) formulated the following recommendation during the plenary session held in China at the end of 2004, with the goal of setting-up and operating an internet based system to provide sensor data, protocols ... and guidelines for these purposes:

Background:

Reference Datasets are required to support the understanding of climate change and quality assure operational services by Earth Observing satellites. The data from different sensors and the resulting synergistic data products require a high level of accuracy that can only be obtained through continuous traceable calibration and validation activities.
Requirement:

Initiate an activity to document a reference methodology to predict Top of Atmosphere (TOA) radiance for which currently flying and planned wide swath sensors can be intercompared, i.e. define a standard for traceability. Also create and maintain a fully accessible web page containing, on an instrument basis, links to all instrument characteristics needed for intercomparisons as specified above, ideally in a common format. In addition, create and maintain a database (e.g. SADE) of instrument data for specific vicarious calibration sites, including site characteristics, in a common format. Each agency is responsible for providing data for their instruments in this common format. Recommendation : The required activities described above should be supported for an implementation period of two years and a maintenance period over two subsequent years. The CEOS should encourage a member agency to accept the lead role in supporting this activity. CEOS should request all member agencies to support this activity by providing appropriate information and data in a timely manner.

Instrumented Sites:
Dunhuang, China, is one of eight instrumented sites that are CEOS Reference Test Sites. The CEOS instrumented sites are provisionally being called LANDNET. These instrumented sites are primarily used for field campaigns to obtain radiometric gain, and these sites can serve as a focus for international efforts, facilitating traceability and inter-comparison to evaluate biases of in-flight and future instruments in a harmonized manner. In the longer-term it is anticipated that these sites will all be fully automated and provide surface and atmospheric measurements to the WWW in an autonomous manner reducing some of the cost of a manned campaign, at present three can operate in this manner.

Purpose: To facilitate and coordinate calibration and validation data over the Dunhuang, China test site.

Related URL

Link: VIEW PROJECT HOME PAGE

Description: Committee on Earth Observation Satellites (CEOS) Working Group on Calibration and Validation (WGCV) Test Sites.

Geographic Coverage

(Click for Interactive Map)

Spatial coordinates

N: 41.45

S: 39.0

E: 96.52

W: 91.98

Temporal Coverage

Start Date: 1975-04-15

Location Keywords

CONTINENT > ASIA > EASTERN ASIA > CHINA

Science Keywords

LAND SURFACE > LAND TEMPERATURE

LAND SURFACE > LAND USE/LAND COVER

ISO Topic Category

CLIMATOLOGY/METEOROLOGY/ATMOSPHERE

IMAGERY/BASE MAPS/EARTH COVER

Platform

ENVISAT > Environmental Satellite

ERS-1 > European Remote Sensing Satellite-1

Instrument

VISUAL OBSERVATIONS

Ancillary Keywords

PENGUINS

REPRODUCTIVE STRATEGY

Originating Center

Data Center

Museo Nacional de Ciencias Naturales, Consejo Superior de Investigaciones Cientificas, Espana

Data Center URL: http://www.mncn.csic.es

Data Center Personnel
Name: JUAN MORENO KLEMMING Phone: +34 914111328 Fax: +34 915646078 Email: jmoreno at mncn.csic.es Contact Address: Museo Nacional de Ciencias Naturales C/ Jose Gutierrez Abascal City: Madrid Postal Code: 228006 Country: SPAIN

Distribution

Distribution Media: CD-ROM;DAT

Distribution Format: ASCII;BINARY

Personnel

ANTONIO BARRAGAN SANABRIA

Role: DIF AUTHOR

Phone: +34913495731

Fax: +34913495929

Email: a.barragan at igme.es

Contact Address:

Centro Nacional de Datos Antarticos

Instituto Geologico y Minero de Espana

c/Rios Rosas 23

City: Madrid

Postal Code: 28003

Country: SPAIN

JUAN MORENO KLEMMING

Role: TECHNICAL CONTACT

Role: INVESTIGATOR

Phone: +34 914111328

Fax: +34 915646078

Email: jmoreno at mncn.csic.es

Contact Address:

Museo Nacional de Ciencias Naturales

C/ Jose Gutierrez Abascal

City: Madrid

Postal Code: 228006

Country: SPAIN

Creation and Review Dates

DIF Creation Date: 2003-06-30

Last DIF Revision Date: 2003-09-24

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