Spacecraft development

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Recommended technology <strong>development</strong>s The sunshield TRP shall be oriented towards a dedicated system – without solar array– and assess the feasibility of deployment and its compatibility with the shield coveritself The FPA electronics and video processing units must be studied on technical andindustrial points of view. A dedicated TRP is recommended on these subjects. The CCDs The Micro propulsion technology selectionGaia configuration: 2005392© Astrium
Gaia configuration: 2005Satellite dry mass (incl. margin)Propellant mass (incl. Cold gas)Total launch mass with marginsSatellite power budget (observation)Launcher: Soyuz Fregat= 1400 kg= 280 kg= 1830 kg= 1700 WKey figures and order of magnitude Primary mirrors: 1.45 m x 0.5 m Focal length: 35 m Pixel: 59 x 177 mas (10 μas 1/6000 pixel) 1 μas rotation M1 < 10 picometers at the edge Focal plane: 420 x 850 mm About 100 CCD, ~ 1 Gpixel Star on CCD: mean: 150, peak: 36000 (magnitude 20) Stellar flux: 20 000 e-/s @ V=15 200 e-/s @ V=20 Sample datation accuracy: 15 ns Tore (3 m dia) thermal stability required some tens of μK Rate measurement error < 0,9 mas/s Rate pointing error < 5 mas Attitude High Frequency Disturbance < 3.4 μas
Page 2 and 3: Gaia programme overview1995 - 2004:
Page 5 and 6: The specification treePArequirement
Page 7 and 8: Mechanical and electrical integrati
Page 9 and 10: Physical measurementsGaia on its ho
Page 11 and 12: Spacecraft design approach Although
Page 13 and 14: Gaia mechanical architecture Decoup
Page 15 and 16: Gaia thermal architectureDSA stowed
Page 17 and 18: Gaia AOCSGaia AOCSAstroStar tracker
Page 19 and 20: CCSVM MIL-STD-1553B Bus NGaia Commu
Page 21 and 22: Specific on Gaia: Timing architectu
Page 23 and 24: Final preparationPropellant fueling
Page 25 and 26: LaunchAnd spacecraft operations are
Page 27 and 28: General ApproachRequired performanc
Page 29 and 30: Major features of the study design
Page 31 and 32: Astro Beam (2/4)Astro Beam (3/4)
Page 33 and 34: APT Beam (1/4)APT Beam (2/4)
Page 35 and 36: Payload accommodationDimensions com
Page 37 and 38: GAIA mechanical modelGAIA mechanica
Page 39 and 40: Gaia configuration : 2002PLMSVMSuns
Page 41 and 42: 2002 Astrometric Instrument Configu
Page 43 and 44: 2002 FEM results: PLM eigenfrequenc
Page 45: Modal analysis resultsLateral mode
Page 49 and 50: Focal Plane Assembly A cold part at
Page 51 and 52: The mechanical SVM The thermal tent
Page 53 and 54: Torus designFPA design

Spacecraft development

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