Universität zu Köln

Efimov, A. I., Lukanina, L. A., Samoznaev, L. N., Rudash, V. K., Chashei, I. V., Bird, M. K. and Paetzold, M. (2014). Two-Way Frequency Fluctuations Observed During Coronal Radio Sounding Experiments. Sol. Phys., 289 (5). S. 1715 - 1730. DORDRECHT: SPRINGER. ISSN 1573-093X

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Abstract

Coronal radio-sounding experiments were carried out using two-way coherent dual-frequency carrier signals of the ESA spacecraft Rosetta (ROS) in 2006. Frequency measurements recorded at both NASA and ESA tracking stations (sample rate: 1 Hz) are analyzed in this work. Spectral analysis of the S-band, X-band, and differential frequency records has shown that the mean frequency fluctuation of each signal can be described by a radial power-law function of the form sigma (i) =A (i) (R/R-aS (TM))(-mi) , where i=x,s,sx. The ratio of the coefficients A (s) and A (x) is not the expected theoretical value A (s)/A (x)=f (s)/f (x). This occurs because the X-band fluctuations underlie a two-way propagation mode while the S-band fluctuations are essentially the product of a one-way propagation experiment. Results are compared with similar, but not identical, two-way radio propagation experiments performed during the 1991 solar conjunction of the Ulysses spacecraft.

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 Rudash, V. K. 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:38-440378
DOI:	10.1007/s11207-013-0417-2
Journal or Publication Title:	Sol. Phys.
Volume:	289
Number:	5
Page Range:	S. 1715 - 1730
Date:	2014
Publisher:	SPRINGER
Place of Publication:	DORDRECHT
ISSN:	1573-093X
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language SOLAR-WIND TURBULENCE; MARS-EXPRESS; CROSS-CORRELATION; SPACECRAFT; SPECTRA Multiple languages Astronomy & Astrophysics Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/44037