Interplanetary baseline observations of type III solar radio bursts

Details Interplanetary baseline observations of type III solar radio bursts Interplanetary baseline observations of type III solar radio bursts

Oct 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977soph...54..431w&link_type=abstract

Solar Physics, vol. 54, Oct. 1977, p. 431-439.

Astronomy and Astrophysics

Astronomy

15

Helios Satellites, Spaceborne Astronomy, Type 3 Bursts, Ray Tracing, Satellite Observation, Satellite Rotation, Solar Corona, Triangulation

Scientific paper

Simultaneous observations of type III radio bursts from spacecraft separated by 0.43 AU have been made using the solar orbiters Helios-A and Helios-B. The burst beginning at 19:22 UT on March 28, 1976, has been located from the intersection of the source directions measured at each spacecraft and from burst arrival-time differences. The source positions range from 0.03 AU from the sun at 3000 kHz to 0.08 AU at 585 kHz. The electron density along the burst trajectory and the exciter velocity (0.13c) were determined directly without the need to assume a density model, as has been done with single-spacecraft observations. The separation of Helios-A and -B has also provided measurements of burst directivity at low frequencies. For the March 28 burst the intensity observed from near the source longitude (Helios-B) was 3-10dB greater than that from 60 deg west of the source (Helios-A)

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