Type II burst starts when the CME reaches ~ 2 Ro
!
•The RAD2 spectral range (14-1 MHz) Wind/WAVES correspond to 2-10 Ro à Type
II bursts can identify shock-driving
CMEs in the near-Sun IP medium.
•For accelerating CMEs: shocks form at large heliocentric distances
•For Halo CMEs: type II occurs first because it takes some time for the CME to be visible above the occulting disk.
•(CME time – when the CME first appears in the C2 FOV)
