Olivier Titaud - Professional web page

Research Engineer at EurogicieL Actually working for the Marine Ecosystem Modelling and Monitoring by Satellites (MEMMS) team at CLS 8-10 Rue Hermes Parc Technologique du Canal 31520 Ramonville-Saint-Agne 31057 Toulouse Cedex 01 Phone : 00 33 (0)5 61 39 47 47 contact[at]oliviertitaud.fr

Numerical codes

Finite Rank Approximations for the Transfer Equation - FRATE

Bibliothèque d'Assimilation Lagrangienne Adaptée aux Séquences d'Images en Environnement - BALAISE

Finite Rank Approximations for the Transfer Equation - FRATE

Description

FRATE is a numerical solver written in C for the transfer equation that intervenes in stellar atmosphere modeling. It contains three additional modules that implement methods for reducing the problem when it is posed on a large domain:

• Interative refinement schemes : Atkinson, Brakhage and C schemes
• Asymptotic Domain Decomposition
• Kernel approximations (with a priori error estimation)

The algorithms implemented in FRATE are described and analysed in my PhD thesis :
O. Titaud. Analyse et résolution numérique de l'équation de transfert. Application aux atmosphères stellaires. 2001. [ pdf ]

Some characteristics

• FRATE is based on finite rank approximation of integral operators
• Implements Projection and Product Integration approximations for both C0 and L1 spaces
• Regular or irregular discretisation grids
• Provides coherent approximations between grid nodes
• Provides residual estimation

Further developments

• Parameter estimation module (still in beta version)

Downloads / Licence

• FRATE is available under the CeCILL licence
• Since FRATE is still a prototype code, you may contact me to configure it for your purpose
• FRATE Source code - June 2005

Bibliothèque d'Assimilation Lagrangienne Adaptée aux Séquences d'Images en Environnement - BALAISE

Description

BALAISE is a library of Fortran90 routines that implement observation operators for Direct Image Sequences Assimilation as it is specified in the following research report:
O. Titaud, A. Vidard, I. Souopgui, and F.-X. Le Dimet. Assimilation of image sequences in numerical models. Technical Report RR-6701, INRIA, October 2008. [ pdf | http ]

Characteristics

• Lagrangian observation operators
• Curvelet transforms of images

Download / Licence

• During the validation stage of BALAISE, it is only available for the members of the ADDISA project at INRIAGforge
• BALAISE will be available under the CeCILL-C licence
• Documentation (in french)

Latest update 02/11/2015