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Proposal for an Interplanetary Mission to Sound the Outer Regions of the Solar Corona

Published online by Cambridge University Press:  14 August 2015

H. Porsche ,
H. Volland ,
K. Bird  and
P. Edenhofer
H. Porsche
Affiliation:
1 Deutsche Forschungs- und Versuchsanstalt für Luft- & Raumfahrt e.V. Forschungszentrum Oberpfaffenhofen, D 8031 Wessling
H. Volland
Affiliation:
1 Deutsche Forschungs- und Versuchsanstalt für Luft- & Raumfahrt e.V. Forschungszentrum Oberpfaffenhofen, D 8031 Wessling
K. Bird
Affiliation:
1 Deutsche Forschungs- und Versuchsanstalt für Luft- & Raumfahrt e.V. Forschungszentrum Oberpfaffenhofen, D 8031 Wessling
P. Edenhofer
Affiliation:
1 Deutsche Forschungs- und Versuchsanstalt für Luft- & Raumfahrt e.V. Forschungszentrum Oberpfaffenhofen, D 8031 Wessling

Extract

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The mission of HELIOS had been started in order to investigate in situ the innermost regions of the interplanetary space. The two spacecraft achieved a perihelion of about 0.3 AU solar distance. Fig. 1 is a sketch of the two orbits. The orbital periods are 190 resp. 186 d.

Type
Part VII. Future Directions
Information
Symposium - International Astronomical Union , Volume 91: Solar and Interplanetary Dynamics , 1980 , pp. 541 - 545
Copyright
Copyright © Reidel 1980 

References

1 Volland, H., Bird, M.K., Levy, G.S., Stelzried, T.C. and Seidel, B.L. HELIOS 1 Faraday Rotation Experiment: Results and Interpretations of the Solar Occultation in 1975; J.Geophys. 42, 659, 1977 Google Scholar
2 Edenhofer, P., Esposito, P.B., Hansen, R.T., Lüneburg, E., Martin, W.L. and Zygielbaum, A.I., Time Delay Occultation of Data of the HELIOS Spacecrafts and Preliminary Analysis for Probing the Solar Corona; J. Geophys. 42, 673, 1977 Google Scholar
3 Edenhofer, P., Bird, M.K. and Volland, H., Comparison of Time Delay and Faraday Rotation Measurements from HELIOS Spacecraft; Kleinheubacher Ber. 21, 305–312, 1977 and H. Süss, Privat Communication Google Scholar
4 Woo, R., Radial Dependence of Solar Wind Properties Deduced from HELIOS 1 and 2 and PIONEER 10/11 Radio Scattering Observations, Astroph. J. 219, 727, 1978 Google Scholar
5 Lüneburg, E. and Esposito, P.B., A Method for the Evaluation of Solar Coronal Plasma Propagation Speeds by Radio Occultation of Space Probes; Nat. Radio Sci. Meeting, U of Washington, Seattle, Wash. 18 - 22 June 1979, p. 284 and JPL - Engineering Memo 315 - 90, 1979 Google Scholar