共查询到19条相似文献，搜索用时 703 毫秒
1.
A Solar and interplanetary observational system composed of
two artificial planets and the earth is suggested for the solar-terrestrial study and
prediction.The two planets should move along the earth's orbit around the sun. The angle
distance between the two planets and between them with the earth is 120°. This system can
be used to improve greatly the short-term,midiu-mterm solar activity predictions and monitor an
earth-toward coronal mass ejection,giving an accurate warning of a solar-terrestrial
disturbance. Observational data obtained by this system would be very useful in a model
work of solar wind and an evolution study of structures in solar atmosphere such as solar
active regions and magnetic fields with various scales. 相似文献
2.
In this paper we
introduce the results of our investigations for some new methods of the automatic
observation forecast、data
processing and research,IncludingAutomatic
forecast and capture of solar flare events;A method in drawing light curves of solar flares with high
accuracy;A method for
the automatic observation of solar active regions etc. 相似文献
3.
Two parameters,the smoothed sunspot numbers in the eleventh month during
rising phase of the current cycle and the length month of the minimum period (R<14),are selected to predict the
maximum-value of sunspot number of cycle 23 in this paper. The predicted maximum-values of
smoothed sunspot number are 115<Ri<149 and 114<Ri<146 also predicted by
statistical method. The peak-time will be from September,1999 to March,2000,and the end-time will be from August,2006 to April,2008. 相似文献
4.
Usually,because of the Starkbroadening
for the spectrum lines,the half widths of hydrogen higher Balmer emission lines of the solar flare
increase with the principal quantum number N. Their variation curve,as observed before,has a minimum value near N=8 or 9. However,a curve for the solar flare which
occurred at the limb of solar disk on June 12,1982shows an all-time decline with increasing N. How to
explain this phenomena remains to be discussed. 相似文献
5.
The article analysizes
the current situation and opportunity of the development of radioheliograph in China. It
provides an idea to construct the radioheliograph by three stepsfrom small sized,to middle sized,then tobig sized. Each step is to construct a complete
radioheliograph. The article also analysizes some important technical performance,such as diameter of element
antenna,overall
pointing error and observing frequency. 相似文献
6.
An introduction to the
instrumonts to be used for solar radio observations in Beijing in Solar Cycle 23 is made
in this paper. They are 10cm solar radio telescope which has been used for a long time,and 1.0～2.0GHz,2.6～3.8GHz and 5.2～7.6GHz spectrometers. The former two spectrometers has
passed a test,showing
high guality,and the
5.2～7.6GHz one will
be in operation from 1999. It is believed that highl gualified data should be obtained in
the next solar cycle. 相似文献
7.
A correlation between
the coronal mass ejection(CME) and the meter wavelength radio bursts is analyzed in this
paper. It is found that type Ⅱ and type Ⅳ bursts
have very good correlation with CME. Noise storms occur several tens minutes before the
onset of the moving type Ⅳ bursts. A sudden stop of noise storms can be used as a sign to foresee the
possibility of a following CME. The three kinds of the moving type Ⅳ
also introduced in this present papersolated source type,the expanding-arc moving Ⅳ type and the advancing front
type. 相似文献
8.
9.
《地球物理学进展》1999,14(1):32
In the paper,the effects of short-term
prediction techniques of solar activity of the World Warning Agency (W) and Beijing
Astronomical Observatory in 1970s(B7) and 1990s(B9) were analyzed statistically by the
standard of the effects of the persistance prediction technique(CH) in the same periods of
time. A Q-index evaluating effects of prediction has been put forward;the index indicates the synthesis of positive effects of
correct forecasts and negative effects of false forecasts. Against the persistence
prediction (CH),the
effects of WWA prediction (W),BAO prediction using 1970s' technique (B7) and 1990s' technique (B9) during the
same periods of time as (CH) have been evaluated by the Q-index. Based on the above,we have advanced a concrete
scientific way to improve the short-term prediction technique. Especially,we have raised that in order to
improve prediction technique,the results of persistence prediction should become the basic component of
short-term prediction of solar activity;namely,present prediction of forecasting the levels of solar
activity should be transformed to forecast the coming change of solar activity levels with
the aim of using the effects of persistence prediction fully. 相似文献
10.
Using the characteristic
values of sunspot number variations during the descent and ascent of solar cycles,a neural network is designed to
make long-term predications of the ascending period and the maximum smoothed monthly mean
sunspot number for the Solar Cycle 23. Moreover,the factor of geomagnetic disturbance is also added as an
input. The trained and tested results from Solar Cycle 12 to 22 have been obtained.
Finally,the
predictions of the ascending period and the maximum smoothed monthly mean sunspot number
are given for Solar Cycle 23. 相似文献
11.
12.
13.
对1970-1980年1AU附近太阳风的观测资料所进行的分析表明,60％的冕旒相关流和40％的CME相关云的流速都不大于350km/s;80％的流速不大于350km/s的低速风起源于冕旒,且除冕旒和CMEs外,看来还存在别的低速风日冕源区.有关冷风的分析表明,近80％的冷风的流速不大于350km/s,80％的冷风起源于冕旒;也有一小部分冷风既非起源于冕旒,也不起源于CMEs.低速风的11年变化显示,在太阳活动各位相,冕旒总是低速风的主要日冕源区.但是,极大位相时的冕旒宽度很可能大于极小和下降位相. 相似文献
14.
现代的日地物理学是把太阳－行星际空间－地球作为一个统一的体系，研究体系中各层次的动力学过程及各层次间的相互耦合作用。太阳活动是引起该系统变化和扰动的主要源，太阳活动的研究在日地物理研究中受到特别的重视。太阳活动现象依其变化速率可被分成缓变型与爆发型两类。本文叙述日地系统学中缓变型大阳活动的研究进展，并且讨论它在９０年代所面临的问题。 相似文献
15.
本文分析了1987年9月23日日环食期间,我国14个电离层站和1988年3月18日日全食期间两个站的垂测仪和偏振仪记录,并综合50年代以来历次日食电离层效应的观测结果,证实:1.E层和F1层光食效应明显,F2层动力学效应显著;2.f0F2存在日食日值大于、小于或等于控制日值三种典型情况;3.TEC食变曲线有凹陷和不凹陷两种典型情况,甚至出现日食日值大于控制日值的异常现象. 本文对F2层和外电离层的动力学特征作了定性讨论,认为:空间等离子体温度急剧下降和沿场扩散是F2层和外电离层日食效应的最主要因素;而磁赤道上空等离子体的沿场扩散、“喷泉”效应,热层风和全（环）食带方位是影响位于磁赤道异常区各电离层站日食电离层效应的主要因素. 相似文献
16.
日地系统学中的太阳活动研究（Ⅱ）爆发型太阳活动—太阳耀斑 总被引：1，自引：0，他引：1
爆发型太阳活动是日地系统中重要的扰动源。本文介绍日地系统学中最剧烈的爆发型太阳活动－太阳耀斑的观测研究进展。综述了最近两个太阳周的地面与空间观测所得到的耀斑的物理图象和统计性质，简单讨论了空间观测设备的发展和面临的研究课题。 相似文献
17.
太阳风的动量涨落将通过磁层边界在磁尾激发磁流体力学波。快磁声波携带扰动能量传到等离子体片中,发展为激波,或者通过激波的相互作用而耗散能量,使等离子体加热。等离子体片中的随机费米加速机制,使麦克斯韦分布尾巴部分的高能量粒子被加速到更高能。在宁静态时,加热、加速与耗散过程平衡。当太阳风的动量或者其涨落较大时,整个加热和加速过程加剧,更多的高能粒子产生,并从等离子体片中逃逸,形成高速的等离子体流注入近地轨道和极区,表现为磁层亚暴过程。利用这种机制,可以解释地球磁层亚暴的定性特征。 相似文献
18.