EISCAT measurements of solar wind velocity and the associated level of interplanetary scintillation
EISCAT measurements of solar wind velocity and the associated level of interplanetary scintillation
复制标题
DOI：
10.5194/angeo-20-1279-2002
复制
发表时间：
2002-09
影响因子：
1.9
通讯作者：
R. Fallows;P. Williams;A. Breen
中科院分区：
文献类型：
--
作者：
R. Fallows;P. Williams;A. Breen
抽象的。相对闪烁指数可以从通常用于研究太阳风速度的行星际闪烁（IPS）的EISCAT观测中导出。这提供了一个理想的机会，可以将从视线沿着若干点得出的太阳风速度的可靠测量值与闪烁总体水平的测量值进行比较。通过选择那些场合，无论是慢或快流散射占主导地位，它表明，在距离太阳大于30 RS，在这两种情况下，闪烁指数下降随着距离的增加作为一个简单的幂律，通常为R-1.7。发现慢流散射的闪烁水平是快流散射水平的2.3倍。关键词。行星际物理学（太阳风等离子体）
Abstract. A relative scintillation index can be derived from EISCAT observations of Interplanetary Scintillation (IPS) usually used to study the solar wind velocity. This provides an ideal opportunity to compare reliable measurements of the solar wind velocity derived for a number of points along the line-of-sight with measurements of the overall level of scintillation. By selecting those occasions where either slow- or fast-stream scattering was dominant, it is shown that at distances from the Sun greater than 30 RS , in both cases the scintillation index fell with increasing distance as a simple power law, typically as R-1.7. The level of scintillation for slow-stream scattering is found to be 2.3 times the level for fast-stream scattering. Key words. Interplanetary physics (solar wind plasma)