Type III radio source located by Ulysses/Wind triangulation

Details Type III radio source located by Ulysses/Wind triangulation Type III radio source located by Ulysses/Wind triangulation

Feb 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998jgr...103.1923r&link_type=abstract

Journal of Geophysical Research, vol. 103, p. 1923

Physics

15

Type 3 Bursts, Ulysses Mission, Solar Wind Velocity, Heliosphere, Plasma Density, Brightness Temperature, Triangulation, Propagation Velocity, Radio Observation

Scientific paper

Radio triangulation from the widely separated Ulysses and Wind spacecraft is used to reconstruct the trajectory of a type III radio burst in the 3D heliosphere. The derived radio trajectory follows a (Parker) spiral path corresponding to a solar wind speed of about 200 km/s and progresses to the south of the ecliptic plane. These remote radio observations also measure the interplanetary plasma density along the path of the radio source. The derived average density-distance scale is very similar to the previously derived RAE density scale, which was determined in a different way. The results of the radio triangulation, combined with a drift rate analysis, give an average electron exciter speed of about 0.3 c. The radio source size and the brightness temperature as viewed from Ulysses and Wind are determined and compared as a function of observing frequency.

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