The coefficient of asymmetry of radio-source interplanetary scintillation

被引：5

作者：

Shishov, VI ^{[1
]}

Tyul'bashev, SA ^{[1
]}

Artyukh, VS ^{[1
]}

Subaev, IA ^{[1
]}

Chashei, IV ^{[1
]}

Chernikov, PA ^{[1
]}

机构：

[1] Russian Acad Sci, PN Lebedev Phys Inst, Ctr Astro Space, Pushchino Radio Astron Observ, Pushchino 142292, Russia

来源：

SOLAR SYSTEM RESEARCH | 2005年 / 39卷 / 04期

基金：

俄罗斯基础研究基金会;

关键词：

D O I：

10.1007/s11208-005-0047-9

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

It is proposed to use the coefficient of asymmetry of the distribution function of fluctuations of a scintillating source flux density as a parameter that characterizes interplanetary turbulent plasma. It is demonstrated that this parameter can be measured with a differential method and that its informative capacity is equivalent to that of the source scintillation index. A series of test observations of scintillations was performed with the Large Phased Array antenna of the Lebedev Institute of Physics, Russian Academy of Sciences, simultaneously with measurements of the source scintillation indices and coefficients of asymmetry. Comparative analysis of the measured quantities showed that the coefficient of asymmetry within a numerical coefficient equals the source scintillation index, normalized to the flux density of the scintillating component. The coefficient of asymmetry makes it possible to restore scintillation indices when the radio sources are weak and it is difficult to measure their mean flux densities, and, hence, it enlarges the number of observable scintillating sources and makes the exploration of interplanetary plasma by means of the mapping of scintillation indices more efficient.

引用

页码：333 / 338

页数：6

共 18 条

[1]

Artyukh V. S., 1982, Soviet Astronomy, V26, P542

[2]

BOURGOIS G, 1972, ASTRON ASTROPHYS, V21, P33

[3]

BOURGOIS G, 1972, ASTRON ASTROPHYS, V21, P26

[4]

Gapper C.R., 1982, NATURE, V296, P633

[5] Probability distribution of irradiance for the onset of strong scintillation [J].

Hill, RJ ;

Frehlich, RG .

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION, 1997, 14 (07) :1530-1540

[6]

HILL RJ, 1996, ETL274 NOAA ENV RES

[7] Travelling interplanetary disturbances detected using interplanetary scintillation at 327 MHz [J].

Janardhan, P ;

Balasubramanian, V ;

Ananthakrishnan, S ;

Dryer, M ;

Bhatnagar, A ;

McIntosh, PS .

SOLAR PHYSICS, 1996, 166 (02) :379-401

[8] DIFFRACTION BY A SCREEN CAUSING LARGE RANDOM PHASE FLUCTUATIONS [J].

MERCIER, RP .

PROCEEDINGS OF THE CAMBRIDGE PHILOSOPHICAL SOCIETY, 1962, 58 (APR) :382-+

[9]

Readhead A. C. S., 1974, Memoirs of the Royal Astronomical Society, V78, P1

[10] Structure of interplanetary shock waves from radio scintillation data [J].

Shishov, VI ;

Vlasov, VI ;

Kojima, M .

SOLAR PHYSICS, 1997, 176 (02) :373-386

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