Polar Magnetosphere Suite

Juno science objectives for the Polar Magnetosphere Investigation require measurement of:

  1. Electric currents along magnetic field lines
  2. Electromagnetic emissions associated with aurora and electrostatic waves
  3. Distribution of energetic particles and distribution of auroral and magnetospheric plasma
  4. Ultraviolet auroral emissions

To obtain these measurements, the spacecraft carries four separate instruments designed to provide observations:

  1. Jovian Aurora Distribution Experiment (JADE)
  2. Energetic Particle Detector (JEDI)
  3. WAVES
  4. UV spectrograph (UVS)


will resolve the plasma structure of the Jovian aurora by measuring the angular, energy and compositional distributions of particles in the polar magnetosphere of Jupiter. Dr. David McComas (Southwest Research Institute) is the lead.


will measure the energy and angular distribution of Hydrogen, Helium, Oxygen, Sulfur and other ions in the polar magnetosphere of Jupiter using the time of flight versus energy technique.  Dr. Barry Mauk (Applied Physics Laboratory/Johns Hopkins University) is the lead.


instrument will identify the regions of auroral currents that define Jovian radio emissions and acceleration of the auroral particles by measuring the radio and plasma spectra in the auroral region. Dr. William Kurth (University of Iowa) is the lead.


records the wavelength, position and  arrival time of detected ultraviolet photons during the time when the spectrograph slit views Jupiter during each turn of the spacecraft.  Using a 1024 x 256 micro channel plate (MCP) detector, it will provide spectral images of the UV auroral emissions in the polar magnetosphere.  Dr. Randy Gladstone (Southwest Research Institute) is the lead.

Jupiter's Magnetosphere
Jupiter's Magnetosphere Global View
Polar Magnetosphere Inset