Universität zu Köln

Efimov, A. I., Lukanina, L. A., Samoznaev, L. N., Chashei, I. V., Bird, M. K. and Paetzold, M. (2016). Observations of Corotating Solar Wind Structures at Radio Sounding by Signals of the Rosetta and Mars Express Spacecraft. Cosmic Res., 54 (3). S. 185 - 194. NEW YORK: MAIK NAUKA/INTERPERIODICA/SPRINGER. ISSN 1608-3075

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Abstract

In the implementation of the space projects Rosetta and Mars Express, a large-scale series of experiments has been carried out on radio sounding circumsolar plasma by decimeter (S-band) and centimeter (X-band) signals of the Rosetta comet probe (from October 3 to October 31, 2010) and the Mars Express satellite of Mars (from December 25, 2010 to March 27, 2011). It was found that in the phase of ingress the spacecraft behind the Sun, the intensity of the frequency fluctuations increases in accordance with a power function whose argument is the solar offset distance of radio ray path, and when the spacecraft is removed from the Sun (the egress phase), frequency fluctuations are reduced. Periodic strong increases in the fluctuation level, exceeding by a factor of 3-12 the background values of this value determined by the regular radial dependences, are imposed on the regular dependences. It was found that increasing the fluctuations of radio waves alternates with the periodicity m x T or n x T, where m = 1/2, n = 1,.nd T is the synodic period of the Sun's rotation (T approximate to 27 days). It was shown that the corotating structures associated with the interaction regions of different speed fluxes are formed in the area of solar wind acceleration and at distances of 6-20 solar radii already have a quasi-stationary character.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Efimov, A. I. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lukanina, L. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Samoznaev, L. N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Chashei, I. V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bird, M. K. UNSPECIFIED UNSPECIFIED UNSPECIFIED Paetzold, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-276151
DOI:	10.1134/S001095251601007X
Journal or Publication Title:	Cosmic Res.
Volume:	54
Number:	3
Page Range:	S. 185 - 194
Date:	2016
Publisher:	MAIK NAUKA/INTERPERIODICA/SPRINGER
Place of Publication:	NEW YORK
ISSN:	1608-3075
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language Engineering, Aerospace; Astronomy & Astrophysics Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/27615