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    ESA > Space in Images > 2004 > 04 > Vega fourth stage

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    Vega fourth stage

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    • Title Vega fourth stage
    • Released 15/04/2004 3:39 pm
    • Copyright ESA
    • Description

      The Vega fourth stage, the Attitude and Vernier Module (AVUM) performs the following functions:

      • roll control during 2nd, 3rd and 4th stage flights
      • attitude control during coasting phase
      • correction of axial velocity error due to solid rocket motor performance scatter
      • generation of the required velocity change for orbit circularisation
      • satellite pointing
      • payload(s) release manoeuvres

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    • Keywords Launchers and space vehicles , Vega

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