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Multiple Incoherent Scatter Radar, Riometer and MagnetometerInvestigations of Wave Phenomena Originating in the High-latitude Ionosphere and Magnetosphere

多非相干散射雷达、辐射计和磁力计研究高纬度电离层和磁层中的波动现象

基本信息

批准号：
8720541
负责人：
Robert Hunsucker
金额：
$ 12.07万
依托单位：
University of Alaska Fairbanks Campus
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
1988
资助国家：
美国
起止时间：
1988-05-01 至 1991-10-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=8720541&HistoricalAwards=false
关键词：
Multiple Incoherent Scatter Radar Riometer

项目摘要

The earth resides in a flow of ionized and magnetized gases emanating from the sun called the Solar Wind. The earth and its magnetic field divert the flow of this supersonic wind, and the confined space in which the earth's magnetic field and ionized gases reside is called the magnetosphere, that extends 10-12 earth radii in the direction of the sun, and a hundred or more earth radii in the antisolar direction. At the magnetosphere boundary the interaction with the solar wind generates electric potential differences of hundreds of kilovolts, and currents of millions of amperes flow down magnetic field lines, through the polar ionosphere, and back out to the solar wind boundary. The currents deposit large amounts of energy in the ionosphere, and set up large waves in the ionosphere itself (hydromagnetic waves) and in the neutral atmosphere (atmospheric gravity waves). Using the incoherent scatter radar at Sondestromfjord, Greenland, and auxillary magnetometer and riometer measurements and auroral images, basic studies of both hydromagnetic and gravity waves and their relationship to ionospheric currents, particle precipitation and ionospheric heating will be carried out. These studies will provide data on the physics of the coupling of the solar wind to the magnetosphere-atmosphere in the polar regions.

地球存在于电离和磁化的气流中从太阳发出的太阳风地球及其磁场改变了超音速风的方向，地球的磁场和电离的封闭空间气体驻留的区域被称为磁层，它延伸10-12 地球半径在太阳的方向，和一百或更多在反太阳方向的地球半径。在磁层边界与太阳风的相互作用产生电数百千伏的电位差，数百万安培的电流沿着磁力线流过极地电离层，然后回到太阳风边界。的电流存款大量的能量在电离层，在电离层中产生巨大的电磁波（磁流体波）和中性大气（大气重力波）。使用格陵兰Sondemfjord非相干散射雷达，辅助磁力计和磁强计测量以及极光图像，磁流体和重力波的基础研究，它们与电离层电流、粒子将进行降水和电离层加热。这些研究将提供有关耦合的物理数据，太阳风对极地地区磁层大气的影响。