ESTREMO/WXT Initiative:
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ESTREMO/WXT Initiative: AAS-I Contribution. ESTREMO/WXT: Preliminary Consideration. For preliminary ESTREMO feasibility evaluation the basic consideration are about: Launch capability (mass, firing volume, firing height) of Vega for LEO Payload Accommodation Fast pointing

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ESTREMO/WXT Initiative: AAS-I Contribution

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Estremo wxt initiative aas i contribution

ESTREMO/WXT Initiative:

AAS-I Contribution


Estremo wxt preliminary consideration

ESTREMO/WXT: Preliminary Consideration

  • For preliminary ESTREMO feasibility evaluation the basic consideration are about:

    • Launch capability (mass, firing volume, firing height) of Vega for LEO

    • Payload Accommodation

    • Fast pointing

  • The more challenging engineeringaspect to be considered is the autonomous fast pointing (req. 60° in 3’ with a goal of 60° in 1’). The fast pointing desiderated dynamics

    • implies Moment of Inertia Minimization (as compact as possible configuration)

    • can imply utilization of special equipment (e.g. Control Moment Gyroscope)

  • For fast pointing the use of off-the-shelf standard equipments (Reaction Wheels) is recommended, mainly for cost, reliability and availability.

  • A very preliminary AAS-I trade-off considers a maximum of 5000 kgm2 as the threshold for the utilization of standard Reaction Wheels (RW).

  • In order to have confidence about the utilization of standard RWs preliminary MoI of a conceptual configuration of ESTREMO has been evaluated.


  • Estremo wxt vega references

    ESTREMO/WXT: VEGA References

    Vega is an European four-stage launcher, tailored to carry the growing number

    of small scientific spacecraft and other lighter-weight payloads under development

    or planned worldwide.

    Vega's lift capability target to arrive at the ESTREMO orbit (700 km equatorial - circular) is 2200 kg.


    Estremo wxt preliminary configuration 1 of 2

    ESTREMO/WXT: Preliminary Configuration 1 of 2

    Launch Configuration

    Operative Configuration


    Estremo wfc preliminary configuration 2 of 2

    ESTREMO/WFC: Preliminary Configuration 2 of 2

    Optics

    TES + Detector + CCD on the bottom (hide by the structure)

    Telescope Structure

    WFI Mask

    WFI Detector

    Reaction Wheels


    Estremo preliminary mass budget

    ESTREMO: Preliminary Mass Budget


    Estremo mass moi

    ESTREMO: Mass & MoI

    System Mass Budget

    System MoI Evaluation


    Estremo wxt initiative aas i contribution

    Final Summary

    With the available information a preliminary ESTREMO configuration

    appears compatible with:

    • Vega Launch capability

    • Payload Accommodation needs

    • Fast pointing with standard equipments


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