ISSN:0094-243X    

DOI:10.1063/1.41719

出版商:AIP    

年代:1992

数据来源: AIP

ISSN:0094-243X    

DOI:10.1063/1.41733

出版商:AIP    

年代:1992

数据来源: AIP

ISSN:0094-243X    

DOI:10.1063/1.41713

出版商:AIP    

年代:1992

数据来源: AIP

摘要:

In this article the author describes a brief history of astronomical research in Japan, research institutes and observatories as well as their facilities and their future plans, particularly, those for the National Astronomical Observatory and the Institute for Space and Astronautical Sciences. Also it is mentioned how their facilities can be used and what are available by astronomers not directly associated with these institutes.

ISSN:0094-243X    

DOI:10.1063/1.41718

出版商:AIP    

年代:1992

数据来源: AIP

ISSN:0094-243X    

DOI:10.1063/1.41720

出版商:AIP    

年代:1992

数据来源: AIP

摘要:

Challenge of space demands an integration of diverse and varied fields in order to develop a new discipline of teaching at the university level. Interaction of education and space research has mutual benefit. Impact, characteristics of space research and its suitability as an academic pursuit, prompt to generate education system and its infrastructure. Manpower requirements are estimated to the order of 100,000 persons besides a high potential of employment in allied fields. Various curricula and research projects are identified. The universities of the developing world do not have large scale infrastructure and a culture for innovative experimentation. Their problems and options have been addressed to. An international centre for space studies is proposed to redress the imbalance and enhance the involvement of the developing world.

ISSN:0094-243X    

DOI:10.1063/1.41721

出版商:AIP    

年代:1992

数据来源: AIP

摘要:

We present here an overview of different types and levels of interaction between the bisophere and the Geosphere. With changing concepts in atmospheric environment, the interactive processes need to be viewed over a larger convas than normally considered. The two major departures made are to include not only the troposphere and the stratosphere but also the middle atmosphere, and also to look at both neutral and ion components in the interactive processes. The specific aspects considered include: nature and variety of interactions; key question and parameters; basic chemistries involved (both neutral and ionic); chemistries of greenhouse gases and of ozone; and a short outline of the Indian contributions and existing and planned facilities.

ISSN:0094-243X    

DOI:10.1063/1.41722

出版商:AIP    

年代:1992

数据来源: AIP

摘要:

This overview paper presents a brief description of the basic physical processes involved in the interactions between the solar wind and the magnetosphere, the ionosphere and the thermosphere of the Earth’s space environment. Sources for information on the magnetospheres of the other planets of the solar system are given.

ISSN:0094-243X    

DOI:10.1063/1.41723

出版商:AIP    

年代:1992

数据来源: AIP

摘要:

This article summarizes main results obtained by the author and his colleagues through recent studies of solar disturbance plasma outputs. The discussions involve the basic characteristics of corotating and transient disturbances and their solar cycle variations. We present evidences for quasi‐steady structure of corotating disturbances, and stress the idea about magnetic expansion of magnetic cloud as the basic character of strong transient disturbance. Finally, the morphology of geomagnetic storm are discussed in response to interplanetary structures.

ISSN:0094-243X    

DOI:10.1063/1.41724

出版商:AIP    

年代:1992

数据来源: AIP

摘要:

Evidence has been discussed showing: that the ionospheric current system is basically in two layers; that the upper current layer peaking over the dip equator at 136±8 km altitude is likely the worldwide part of Sq; that the lower current layer peaking at 106 km altitude is likely the equatorial electrojet (EEJ); and that the EEJ returns close by the flanks of the dip equator. As the first contours of the worldwide part of Sq have now been presented, some of its parameters are compared with those of the EEJ. The ratios of the internal to the external parts of the EEJ magnetic field components are given as: Hi/He, 0.28±0.08, Zi/Ze, −0.17±0.02, Fi/Fe, 0.23±0.02. The ratio AF/AH, of the difference field on penetrating the ionospheric current layers to their horizontal magnetic field on the ground decreases from about 2.4 at the dip equator to about unity towards the EEJ current focus at about 3° dip latitude. New proposals capable of explaining the observed features and mechanisms of the equatorial counter electrojet have been presented.

ISSN:0094-243X    

DOI:10.1063/1.41725

出版商:AIP    

年代:1992

数据来源: AIP