Validation of SCIAMACHY products

A contribution to ACCENT-TROPOSAT-2, Task Group 4

Ankie Piters

KNMI, Atmospheric Composition Research Division,
Postbus 201, 3730 AE De Bilt, Netherlands
Tel:  +31-(0)30-2206433
 Fax: +31-(0)30-2210407

The objective this task is to coordinate and contribute to the geophysical validation of tropospheric satellite data products from SCIAMACHY. This concerns both official ESA products as well as products derived by various scientific groups.

The coordination of validation is necessary to ensure that the quality of all products has been sufficiently assessed for its use and any data release to the scientific community is accompanied by a detailed description of the knowledge of the systematic and random errors. To this end SCIAVALIG (SCIAMACHY Validation and Interpretation Group) has set up a system with product coordinators for each SCIAMACHY product. The product coordinators are responsible for generating an overview of the error-behaviour of their products, using the inputs from the validation teams. Furthermore, a validation plan has been written that describes in detail the activities planned to ensure a proper validation of SCIAMACHY. It gives information on the organisation, coordination, communication, data-distribution and responsibilities. It provides an overview of the activities and planning in the different phases of validation. This document is written primarily as a source of information for the validation scientists.

The original schedule for the validation has been delayed leading to a still considerable validation effort at present (2004), two years after launch. The next phase is the long-term validation, which focuses on stability of the product quality and delta-validation of product updates.

The central SCIAMACHY validation website (http://www.sciamachy-validation.org/) contains information on e.g. time schedules, meetings and workshops, data access, validation tools and gives access to SCIAMACHY validation documents and links to other relevant web sites. A large part of the validation website is a password protected discussion site, where the validation results are posted. The web site is expanded with pages for scientific product validation.

The contribution of this activity to ACCENT-TROPOSAT is to provide a regular overview of the status of the SCIAMACHY products regarding their quality assessment and to point out product deficiencies that require solutions in the field of instrumental aspects, level 1, retrieval or data assimilation. On the other hand, AT2 will offer new and improved SCIAMACHY products affecting validation plans. The large overlap between the AT2 and SCIAVALIG communities ensure a timely and effective interaction.

Time Schedule

 

2004

2005

2006

2007

2008

2009

Validation coordination

*

*

*

*

*

*

 Approximate manpower and cost*

 

2004

2005

2006

2007

2008

2009

Personnel / man-years

1

2

2

2

2

2

Yearly cost (kECU)

5

10

10

10

10

10

*Reported costs are travel expenses only

Likely funding agencies

The Netherlands Agency for Aerospace Programs (NIVR) funds the Dutch SCIAMACHY validation effort for the period 2003-2005. Funding through EU FP6 will be attempted.

Co-workers

Piet Stammes, Renske Timmermans and Hennie Kelder.

 


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