Accommodation From DoI studies Jan E. S. Bergman Swedish Institute of Space Physics, Uppsala, Sweden RPWI Team Meeting Uppsala, May 9-11, 2012

JUICE Spacecraft Dry mass ~1900 kg, propellant ~2900 kg High Δv required: 2600 m/s Model payload 104 kg, ~120 – 150 W 3-axis stabilized s/c Power: solar array 60 – 70 m2, 640 – 700 W HGA: >3 m, fixed to body, X & Ka-band Data return >1.4 Gb per 8 h pass (one station) Option 1 Option 2 Option 3

Model payload for Fields & Particles Magnetometer (MAG): 1.8 kg Radio & Plasma Waves Investigation (RPWI): 11.2 kg Particle & Plasma Instrument – Ion Neutral Mass Spectrometer (PPI-INMS): 18.2 kg Total mass: 31.2 kg (out of 104 kg, equals 30%)

Option 1

Stowed configuration SSR MAG Boom LP PWI

Deployed configuration LP PWI

Deployed configuration RWI

Option 2

Nadir face

Nadir face

Option 3 Configuration 1

Deployed configuration MAG Boom RWI SSR LP PWI 23/07/2010

Main engine side PP DU RWI 23/07/2010

Option 3 Configuration 2

SWI PP-MU HRC VIRHIS WAC UVIS SSR DPU JSRT USO RWI LA LA electronic unit with camera DPU beneath LA Payload description MAG ICU

PP DU

Consequences for the AO response Two of the three options will be selected before the AO Payload accommodation will then be open for discussions again However all three options must be considered meanwhile – that is when we start writing the proposal