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Télécharger le pdf "Article RS 2014 CIRAD" , Paper "Toward a satellite-based system of sugarcane yield estimation and forecasting in smallholder farming conditions: a case study on Reunion Island” (...)

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Introduction

Welcome to the Kalideos Isle-Réunion Web site !

In view of the success met by Kalideos Adam, CNES decided in 2001 to forge ahead with the development of a new remote sensing reference database. This concept consists in gathering on a reduced number of sites representative of specific thematic issues a large amount of satellite images, together with auxiliary data suitable for image use and interpretation. This whole data set is then put at the disposal of the scientific community on a free basis, enabling therefore the development of new thematic applications or the consolidation of the existing ones.

While Kalideos Adam was exclusively dedicated to agriculture and the space data assimilation technique within crop models describing wheat growth, CNES wanted to widen the range of applications of the new database by assigning a multi-thematic purpose to it from the outset. The Reunion island then appeared as the most appropriate place to set up such a database.

This small-sized site (roughly 60 x 70 km) is a quite varied area, involving all the land planning issues which apply to a territory attracting many tourists (environment protection, urban pressure...), while retaining an intense agricultural activity thanks to the sugarcane industry. Moreover, the presence of the still active Fournaise Peak gives to the island a major interest in the field of volcanology. At last, all the major French research bodies are represented on the island and have carried out specific projects for years there, while the availability of a local university offers a significant reservoir of students and researchers. These are the issues that guided the development of the new database and lead to the selection of its name: Kalideos Isle-Réunion (Information Satellitaire pour l’Environnement - Satellite Imagery for the Environment).

The Kalideos Isle-Réunion database aims at promoting the use of remote sensing to scientists from various fields, while offering them the opportunity to access easily to spaceborne data tailored to their issues of interest. They will be thus able to interface their models with these data to improve existing applications or develop new ones. The purpose of the Kalideos Isle-Réunion database is therefore to supply researchers with series of pre-processed, multitemporal and multi-sensor satellite data, enhanced with high quality field measurements.

By supporting such databases, CNES can better determine all the space data relevant for the various considered issues. Indeed, the knowledge of the input data which is not only necessary but also adequate to derive the requested thematic information allows to define the “minimum” mission for the considered topic and help to specify future specialised observation systems.