Global Change Master Directory (GCMD)

Data Sets

Services / Tools

Ancillary Descriptions

Are you using a browser that doesn't support JavaScript or have you disabled JavaScript?

If you have disabled JavaScript, you must re-enable JavaScript to use this page.
Or you can view this record using the Text Only Format.

CEOS Cal Val Test Site - La Crau, France - Instrumented Site

Entry ID: CEOS_CalVal_Test_Site-La_Crau-France

[ Update this Record ]

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:
La Crau, France 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 La Crau, France 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: 45.63

S: 41.86

E: 6.49

W: 1.92

Temporal Coverage

Start Date: 1972-08-16

Location Keywords

CONTINENT > EUROPE > WESTERN EUROPE > FRANCE

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

OZONESONDES

RADIOSONDES

Project

SHADOZ > Southern Hemisphere ADditional OZonesondes

Quality "The data on this website is preliminary: subject to revision and
reprocessing. Check dates of creation to download the most current
version. Contact the co-investigators for questions concerning data
techniques and quality."

Access Constraints None

Use Constraints None

Ancillary Keywords

SHADOZ

Data Set Progress

IN WORK

Data Center

Atmospheric Chemistry and Dynamics Branch, Laboratory for Atmospheres, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA

Data Center URL: http://atmospheres.gsfc.nasa.gov/acd/

Data Center Personnel
Name: JACQUELYN C. WITTE Phone: 301-614-5991 Email: jacquelyn.c.witte at nasa.gov Contact Address: NASA Goddard Space Flight Center Mailstop 613.3 City: Greenbelt Province or State: MD Postal Code: 20771 Country: USA

Distribution

Distribution Media: online, WWW

Distribution Format: ASCII

Fees: None

Personnel

VOLKER W.J.H. KIRCHHOFF

Role: INVESTIGATOR

Fax: 55-123-22-9887

Email: kir at dge.inpe.br

Contact Address:

INPE/Lab. de Ozonia/INPE-CP 515

AV ASTRONAUTOS 1758

Sao Jose, dos Campos

City: Sao Paulo

Postal Code: 12201-970

Country: Brazil

Publications/References

Thompson, A. M., J. C. Witte, R. D. McPeters, S. J. Oltmans,
F. J. Schmidlin, J. A. Logan, M. Fujiwara, V. W. J. H. Kirchhoff,
F. Posny, G. J. R. Coetzee, B. Hoegger, S. Kawakami, T. Ogawa,
B. J. Johnson, H. Vomel and G. Labow. 2001. The 1998-2000 SHADOZ
(Southern Hemisphere Additional Ozonesondes) Tropical Ozone
Climatology: Comparisons with TOMS and Ground-based Measurements,
J. Geophysical Research - Atmospheres, submitted, 2001.

Creation and Review Dates

DIF Creation Date: 1999-12-14

Last DIF Revision Date: 2009-06-09

Reformat as FGDC document

View Text Only Format

[ Update this Record ]