Tracking of kilometric-wave type III solar bursts in elevation and elongation and apparent source sizes

With our experiment on the satellite IMP-6 (Explorer 43) we are able to track the position of type III solar bursts in elevation as well as elongation. We do this by measuring the correlations between signals on an electric dipole antenna which is approximately normal to the plane of the ecliptic, and either of two antennas rotating in the ecliptic plane. The result is that the sources are generally close to the ecliptic plane, close enough that their elevation above the ecliptic cannot account for the large apparent width which we and others observe, and that this width must therefore be real.