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The Jupiter Observing Velocity Experiment (JOVE) is a solar-powered technology demonstration of rapid flight to outer solar system targets, performing a flyby of Jupiter 30 days after launch. This is achieved using a magnetic drag device to accelerate with the solar wind plasma. This “Wind Rider” propulsion system can potentially also decelerate against the Jovian magnetosphere dawn eddy, to enable Jupiter orbital insertion in future missions. The 16U cubesat bus contains scientific instruments to record the plasma parameters from the vicinity of the spacecraft, with principal measurements coming from a SPAN-I ion velocity sensor. This paper includes a description of the propulsive mechanisms and supporting subsystems and trajectory simulation results derived from solar wind measurements over the past two solar cycles. The objectives of the JOVE technology demonstrator design include: (1) verify Wind Rider stability and control; (2) characterize loss mechanisms in the solar wind, such as resistive losses in the plasma, as well as the magnetic field transient interaction time; (3) operate onboard instruments to measure the velocity and direction of the solar wind (SPAN-Ai) and speed of the spacecraft relative to the Earth (radio Doppler shift), to enable precision navigation on future science missions; and (4) characterize the Lift-to-Drag ratio of the plasma magnetic field. (The lift force enables lateral course control and maneuvering within the solar wind.) Applying existing scientific data from Voyagers and other deep space probes into new engineering models was important for enabling new insights about Wind Rider propulsion. It enables more science to be performed in a shorter amount of time, across the Jovian system.

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RES|IME: AprDs un bref erposd des 6ubnenents qui ont amen6 La cr6ation du Bureau dt6tude suT Les substanees totLques (BEST)' Ltauteu:t, erpose Les diue:r'ses actLuit6s de ce bureau qui a pout, mandat de cooz'donner Les acti.uit6s gouDernemenlales pour' combattre Les agressions toriques au Qudbee.ABSTRACT: A bz"Lef desct+ption of the euents resportsibLe for the creation of the ttBuy,equ des substartces torLques" (BEST) is presented. The actiDities of this Buyeau of eoor&Lnation of gouervmentaL actioities in eountez"Lng torLc emissions Ln Quebec ay,e descy,Lbed.

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