The High Resolution Optical Instruments for the Pleiades HR Earth Observation Satellites
- Paper number
IAC-08.B1.3.5
- Author
Mr. Luc Frécon, ThalesAlenia Space, France
- Year
2008
- Abstract
Coming after the SPOT program, it was decided to go ahead with the PLEIADES HR one. This program is the optical high resolution component of a larger optical and radar multi-sensors system : ORFEO, which is developed in cooperation between France and Italy for dual Civilian and Defense use. Thales Alenia Space has been entrusted by CNES with the development of the high resolution optical instrument of the Earth observation satellites PLEIADES HR. The PLEIADES HR instrument program benefits from Thales Alenia Space long and successful heritage in Earth observation from space. The corresponding design and production teams are experienced and well trained. The proposed solution benefits from an extensive use of existing products for the High Resolution instruments for the European intelligence satellites HELIOS I and II. This new generation of instrument represents a breakthrough in comparison with the previous SPOT instruments owing to a significant step in on-ground resolution, which approaches the capabilities of aerial photography. Crucial improvements in detector technology, optical fabrication and electronics make it possible for the PLEIADES HR instrument to achieve their image quality performance goals while staying within weight and size restrictions normally considered suitable only for much lower performance systems. The two flight telescopes have been integrated, aligned and tested in Thales Alenia Space Cannes facilities, taking advantage of its space optics centre, unique in Europe. After the integration phase, the alignment, mainly based on interferometric measurements in vacuum chamber, was successfully achieved within high accuracy requirements. The wave front measurements show outstanding performances. Engineering Model Detection Unit integration and performance verification are completed. The design of the Highly Integrated Detection Electronic Subsystem has been validated with performances at the expected level. Now, Proto-Flight Model Instrument integration and performance verification with PFM Detection Unit are in progress for a delivery mid 2008. The FM2 Instrument delivery is planned Q1- 2009. The first optical satellite launch of the PLEIADES HR constellation is foreseen beginning-2010, the second will follow beginning-2011.
- Abstract document
- Manuscript document
IAC-08.B1.3.5.pdf (🔒 authorized access only).
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