5.1 Remote sensing of CMEs at large distances from the Sun

Several techniques have been developed to remotely detect and track disturbances related to CMEs in the interplanetary medium (e.g. Jackson, 1992). These have utilized radio and white light wavelengths to detect and image these structures. The techniques are kilometric radio observations from space and metric radio interplanetary scintillation (IPS) observations from the ground. The kilometric observations can track the emission typically from strong shocks traveling ahead of fast CMEs. Such instruments have been flown on the ISEE-3 and Ulysses spacecraft and are currently on board Wind and STEREO.
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