Changes between Version 31 and Version 32 of UserApp/Proba-V

Dec 12, 2011, 1:24:22 PM (8 years ago)

/* Technologies */


  • UserApp/Proba-V

    v31 v32  
    160160device to fly in space. GaN has been called the most promising semiconductor since silicon, capable of operating at
    161161higher powers and temperature. It is also inherently radiation resistant. Another guest technology payload slot remains to be allocated.
     162= Platform =
     165Proba-V’s platform – otherwise known as its ‘bus’, the surrounding structure containing all necessary subsystems to
     166let the payload do its work – takes its flight heritage from the Proba series of small satellites. The platform has
     167been demonstrated in orbit by the Proba-1 and Proba-2 missions.
     169The underlying design is recurrent from Proba-2. It is box-shaped, with precise dimensions 765 x 730 x 840 mm3. The platform
     170is based around a H-structure with structural panels made from aluminium and carbon fibre reinforced plastic (CFRP) material.
     171Unlike Proba-2, which has deployable panels, Proba-V will have its solar array mounted onto its satellite body.
     173The satellite is three-axis stabilised, with an attitude and orbit control system inherited from Proba-2. incorporating a star
     174tracker, GPS receivers, magnetometer and magneto-torquers.
     176In an significant upgrade from previous Proba missions, the star trackers - as well as the Vegetation instrument payload – have been
     177placed on an optical bench to minimise temperature-driven structural deformation. Navigation and manoeuvres take place on a largely
     178autonomous basis, with minimal input from the ground. 
     180The satellite has a design lifetime of 2.5 years, and possesses total system redundancy to make it single-failure tolerant.
    162181= Spacecraft: =