New Millennium Research at the Jicamarca Radio Observatory

吉卡马卡射电天文台的新千年研究

• 批准号: 9911209
• 负责人: Donald Farley
• 金额: --
• 依托单位: Cornell University
• 依托单位国家: 美国
• 项目类别: Cooperative Agreement
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-07-01 至 2005-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9911209&HistoricalAwards=false
• 关键词: New; Millennium; Research; Jicamarca; Radio

ATM9911209absCornell University will continue operations of the Jicamarca Radio Observatory (JRO) located near Lima, Peru. The main instrument at JRO is the 50 MHz incoherent scatter radar. Also on site are other antennas (some steerable, some broad beam) that are used for studies of plasma instabilities. Nearby instruments used for coordinated experiments include a digisonde, magnetometers and optical instruments. The scientific research conducted by JRO staff and other visiting scientists includes studies of the thermal structure of the equatorial ionosphere, low latitude electrodynamics, plasma instabilities, and thermospheric and mesospheric dynamics. A new capability of the radar called JULIA allows the radar to be operated almost continuously in a low power mode to study the occurrence and evolution of plasma instabilities in the equatorial ionosphere. Major research topics include: (1) the thermal structure of the equatorial ionosphere, (2) low latitude electrodynamics during both quiet and disturbed times, (3) plasma instabilities in the E-region electrojet, in the region near 150 km altitude, and in the F region, (4) lower thermosphere dynamics and the effects of winds and waves in the neutral atmosphere, (5) equatorial mesospheric dynamics and the effect of the mesosphere on higher regions, and (6) minor studies of other phenomena, such as long term changes in the geomagnetic field. Science activities at Jicamarca contribute to understanding of global change and space weather.

ATM9911209康奈尔大学将继续运营位于秘鲁利马附近的Jicamarca射电天文台(JRO)。JRO的主要仪器是50兆赫非相干散射雷达。现场还有其他用于研究等离子体不稳定性的天线(一些是可操控的，一些是宽波束的)。附近用于协调实验的仪器包括数字探测仪、磁强计和光学仪器。JRO工作人员和其他访问科学家进行的科学研究包括对赤道电离层的热结构、低纬电动力学、等离子体不稳定性以及热层和中间层动力学的研究。该雷达的一项名为Julia的新功能允许该雷达几乎连续地在低功率模式下运行，以研究赤道电离层中等离子体不稳定的发生和演变。主要研究课题包括：(1)赤道电离层的热结构，(2)安静和扰动期间的低纬电动力学，(3)E区电喷流、150公里高度附近区域和F区的等离子体不稳定性，(4)中性大气中的低热层动力学和风和波的影响，(5)赤道中间层动力学和中间层对较高区域的影响，以及(6)对其他现象的次要研究，例如地磁场的长期变化。Jicamara的科学活动有助于了解全球变化和空间天气。