Degree of polarization 4 Polarization 4 Bow shocks 2 Cone angle 2 Cyclotron 2 Cyclotron resonance 2 Cyclotrons 2 Electric fields 2 Electromagnetic fields 2 Electromagnetic plasmas 2 Electron beams 2 Elliptical polarization 2 Exosphere 2 Interplanetary magnetic fields 2 Ions 2 Light polarization 2 Magnetic fields 2 Mars 2 Mars global surveyor 2 Minimum variance analysis 2 Pick-up 2 Pick-up ions 2 Pickups 2 Plasma waves 2 Proton cyclotrons 2 Protons 2 Radial distance 2 Random electromagnetic fields 2 Reference frame 2 Solar wind 2