Continued Support of the Bruny Island Radio Spectrometer

继续支持布鲁尼岛射电光谱仪

• 批准号: 0710463
• 负责人: William Erickson
• 金额: $ 7.75万
• 依托单位: Erickson, William C
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-07-01 至 2013-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0710463&HistoricalAwards=false
• 关键词: Continued; Support; Bruny; Island; Radio

The PI will continue the operation of the Bruny Island Radio Spectrometer (BIRS) in Tasmania for an additional five years after mid-2007. BIRS operates in the frequency range from 5 to 62 MHz and employs modern digital techniques to avoid strong radio interference. BIRS also bridges the gap between low frequency solar radio observations made from space and most of the routine higher frequency observations made from the surface of the Earth, providing a useful link between space-based and ground-based solar radio observations. BIRS data are primarily useful for understanding and predicting coronal mass ejections (CMEs), solar energetic particles (SEPs), and geomagnetic storms. An additional five years of operation will make BIRS data available well into the next solar cycle, during the period of STEREO spacecraft operation.BIRS is at nearly the same longitude as the Culgoora spectrograph in Australia and observes the Sun for a similar period of time each day. BIRS provides a frequency overlap between space-based observations by WAVES and STEREO and those of Culgoora. By combining data from these three instruments, spectra can be produced from about 20 kHz (the approximate low-frequency cutoff caused by the interplanetary medium) to 1800 MHz (the upper frequency of the Culgoora instrument). The PI will investigate the nature of metric type II bursts and their role in large solar events; the propagation of energetic electron and proton streams through the heliosphere; and the generation of decametric bursts with very fine time and frequency structure. Design information for BIRS has been provided to other groups and similar systems have been built at NRAO-Green Bank (Green Bank Solar Radio Burst Spectrometer, GBSRBS) and at Goddard Space Flight Center. Combining the data from these systems provides nearly 24 hours per day of solar coverage. The BIRS data are displayed on the GBSRBS web site each day in order to make them publicly available to the solar community.

PI将在2007年年中之后继续运行塔斯马尼亚的布鲁尼岛射电频谱仪（BIRS），为期五年。BIRS在5至62兆赫的频率范围内工作，并采用现代数字技术，以避免强烈的无线电干扰。BIRS还弥补了从空间进行的低频太阳射电观测与从地球表面进行的大多数常规高频观测之间的差距，为天基和地基太阳射电观测提供了有用的联系。BIRS数据主要用于了解和预测日冕物质抛射（CME），太阳高能粒子（SEP）和磁暴。再运行五年，将使BIRS的数据在STEREO航天器运行期间的下一个太阳活动周期内都能得到，BIRS与澳大利亚的Culgoora摄谱仪处于几乎相同的经度上，每天观测太阳的时间相似。BIRS提供了WAVES和STEREO的天基观测与Culgoora的天基观测之间的频率重叠。通过结合这三台仪器的数据，可以产生从大约20 kHz（由行星际介质引起的近似低频截止）到1800 MHz（Culgoora仪器的上限频率）的光谱。PI将调查公制II型爆发的性质及其在大型太阳事件中的作用;高能电子和质子流通过日光层的传播;以及具有非常精细的时间和频率结构的十米波爆发的产生。BIRS的设计信息已提供给其他小组，类似的系统已在NRAO-绿色库（绿色库太阳射电暴光谱仪，GBSRBS）和戈达德航天飞行中心建造。结合这些系统的数据，可以提供每天近24小时的太阳覆盖。BIRS数据每天都在GBSRBS网站上显示，以便向太阳能社区公开提供。