SPIRALE: the French Space-Based Early Warning Demonstrator

Paper number

IAC-07-B4.6.15

Author

Mr. Philippe Guyot, Thales Alenia Space, France

Coauthor

Mr. Luc Frecon, Thales Alenia Space, France

Coauthor

Mr. Alain Clauss, Thales Alenia Space, France

Coauthor

Mrs. Roselyne Dupré, Thales Alenia Space, France

Year

2007

Abstract

Micro-satellites usually dedicated to low cost scientific missions or technological demonstration can also contribute to the preparation of future missions by in orbit validation of key requirements. Starting from this point, DGA (from the French MoD) has ordered a
contract early 2004 to EADS ASTRIUM for the development of the SPIRALE early warning space demonstrator. Its purpose is to collect background images and to evaluate by simulation the achievable performances of a future early warning system. THALES ALENIA SPACE is
responsible of the definition and development of the demonstrator satellites.
Based on the Myriade platform already developed by CNES, two micro-satellites will be launched in 2008 as auxiliary payloads by an Ariane-5 launcher on a Geostationary Transfer Orbit. The SPIRALE satellite payload consists in a multi-spectral infrared imager.
The definition of the satellite has been successfully achieved with the completion of the Critical Design Review in July 2006. Specific pointing strategies have been determined to cope with both orbital and mission constraints, with observations taking place on high and
middle altitude ranges. The adaptation of the satellite components with the radiation environment has also been demonstrated. Instrument performances, for each IR bands, have been also assessed permitting to verify their total compatibility with mission requirements.
With the availability of the first flight items and the start of the platform AIT, the satellites are now entering their final realisation phase.
This paper will provide the overall definition status of the SPIRALE satellites, their main characteristics, and present the activities still to be undertaken until their launch in 2008.

Abstract document

IAC-07-B4.6.15.pdf

Manuscript document

IAC-07-B4.6.15.pdf (🔒 authorized access only).

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