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Proceedings Paper

New instrument concept to follow up and improve the SPOT program success
Author(s): Julien Barba; Vincent Albouys; Michel Laporte; David Laubier; Eric Lorigny
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Paper Abstract

The SPOT follow-on system whose French acronym is 3S (Suite du Systeme Spot) is a new CNES (French Space Agency) Earth Observation program with reduced development cost as a major objective. In order to reach this goal, the new satellite architecture must lead to an important reduction of the mass, the target being around 500 kg. The reduced mass of the new instrument, that is the essential part with regard to the image quality performances, will have to be taken into account with the aim of using as much as possible the R&D studies that are in progress. The present paper describes a new concept of instrument. The optical system based on a TMA (Three-Mirror Anastigmat) telescope with 3.8 degree Field Of View (FOV) allows the compact architecture necessary to the mass reduction while keeping high performances. The mechanical architecture realizes the deportment of the instrument parts that are submitted to the ground and flight environment while keeping stiffness and stability. The pointing system modifies the direction of the image acquisitions within a plus or minus 30 degree range along track and plus or minus 45 degrees across. The focal plane is composed of two sensors for the acquisition in one panchromatic and four multispectral bands. The processing electronics converts with a 6 Mpixels/s rate the data to 10 bit words in the entire signal dynamic. Finally, the main performances are shown.

Paper Details

Date Published: 28 December 1999
PDF: 10 pages
Proc. SPIE 3870, Sensors, Systems, and Next-Generation Satellites III, (28 December 1999); doi: 10.1117/12.373162
Show Author Affiliations
Julien Barba, CNES (France)
Vincent Albouys, CNES (France)
Michel Laporte, CNES (France)
David Laubier, CNES (France)
Eric Lorigny, CNES (France)


Published in SPIE Proceedings Vol. 3870:
Sensors, Systems, and Next-Generation Satellites III
Hiroyuki Fujisada; Joan B. Lurie, Editor(s)

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