Interplanetary Type III Radio Bursts Observed Simultaneously by ULYSSES and ICE

Details Interplanetary Type III Radio Bursts Observed Simultaneously by ULYSSES and ICE Interplanetary Type III Radio Bursts Observed Simultaneously by ULYSSES and ICE

Apr 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995ssrv...72..267h&link_type=abstract

Space Science Reviews, Volume 72, Issue 1-2, pp. 267-270

Computer Science

1

Scientific paper

We analyze two solar type III radio bursts that were observed simultaneously by the ICE and Ulysses spacecraft. Both bursts originated behind the solar limb as viewed from either spacecraft. At the time of these events, ICE was in the ecliptic plane at ˜1 AU and Ulysses was ˜ 35° south of the ecliptic plane at ˜4 AU. For one event on 931117, the ratios of the peak flux densities measured at each spacecraft, at each observing frequency, were consistent with the most probable source locations relative to ICE and Ulysses. The second event on 931004 was a complex burst consisting of two distinct components at high frequencies. At low frequencies, the intensity of the first component decreased rapidly at each spacecraft. The second component, however, dominated the low frequency emission observed at Ulysses but not at ICE. These differences in the observed radiation must be related to the different viewing geometries of the two spacecraft. The measured onset times as a function of observing frequency were consistent with a constant exciter speed through the interplanetary medium and suggest that there are significant propagation delays, especially for the radiation propagating within the ecliptic plane.

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