首页> 美国政府科技报告 >Electromagnetic Spectrum Occupancy Study of a Potential Transmitter Site for theHF Active Auroral Research Program (HAARP)

【24h】

Electromagnetic Spectrum Occupancy Study of a Potential Transmitter Site for theHF Active Auroral Research Program (HAARP)

机译：HF活跃极光研究计划（HaaRp）潜在发射场的电磁频谱占用研究

获取原文

页面导航

摘要
著录项
相似文献
相关主题

摘要

This report presents the results of measurements conducted by the Naval ResearchLaboratory in May and June 1993. The purpose of the measurements was to ascertain the radio frequency occupancy in the immediate vicinity of the proposed High Frequency Active Auroral Research Program (HAARP) facility to be constructed in the Gakona, Alaska area. The HAARP facility will consist of a large planar array of antennas excited by phased high power transmitters operating in the lower portion of the HF band (2.8 to 8 MHz). The existing electromagnetic spectrum usage in the vicinity of Gakona was measured in order to assess the potential for electromagnetic interference problems arising from the HAARP facility. The measurements covered the frequency spectrum from 2 MHz to 1000 MHz. Data was collected for a period of 17 days in May and early June 1993. There are a large number of users in the HF band and data shows a normal diurnal pattern of energy increase in the lower portion of the band in the nighttime hours. The number of users decreases with increasing frequency because the propagation path at higher frequencies is dependent upon line-of-sight signal paths. Gakona is a very rural area and is separated by hilly terrain from surrounding residential and commercial activities. Above the HF bend, the most prominent signal identified is a 152 MHz transient signal that saturates the signal path of our measurement apparatus. The signal is so strong that it produces harmonics throughout the measurement band and distorts the display of the data. Another strong feature that is sometimes observed is a 450 MHz signal.

著录项

作者
Goldstein, J. A.; Kennedy, E. J.; McGown, M. Y.;
展开▼
作者单位

展开▼
年度 1994
页码
总页数 50
原文格式 PDF
正文语种 eng
中图分类工业技术;
关键词
Aurorae; Radio transmitters; Electromagnetic spectra; High frequency; Electrondensity; Harmonics; Electromagnetic wave propagation; Electromagnetic radiation; Electromagnetic interference; Amplitude; Radio waves; Radiofrequency; Spectrum analyzers;

机译：aurorae;无线电发射机;电磁波谱;高频;电子密度;谐波;电磁波传播;电磁辐射;电磁干扰;幅度;无线电波;射频;频谱分析仪;

相似文献

外文文献
中文文献
专利

1. Artificial Ionospheric Irregularities Measured with MUIR (Modular UHF Ionospheric Radar) at HAARP (High Frequency Active Auroral Research Program) [J] . Ohyama Shin-Ichiro, Brenton J. Watkins Journal of the National Institute of Information and Communications Technology . 2007,第1a2期

机译：在HAARP（高频主动极光研究计划）下，使用MUIR（模块化UHF电离层雷达）测量的人工电离层不规则性
2. Properties of the Stimulated Electromagnetic Emissions During the Inclined High‐Frequency Pumping of the Ionosphere Near the Fourth Electron Gyroharmonic at the High‐Frequency Active Auroral Research Program Facility [J] . Shindin A. V., Grach S. M., Sergeev E. N., Geophysical Research Letters . 2019,第11期

机译：高频活性极光研究计划设施的第四电子陀螺谐波附近电离层倾斜高频泵浦刺激的电磁排放的性质
3. Exploring HF-induced ionospheric turbulence by Doppler sounding and stimulated electromagnetic emissions at the high frequency active auroral research program heating facility [J] . Evgeny N. Sergeev, Alexey V. Shindin, Savely M. Grach, Radio Science . 2016,第7期

机译：在高频主动极光研究计划供暖设施中，通过多普勒测深和受激电磁辐射探索HF诱发的电离层湍流
4. History and applications of HAARP technologies: the High Frequency Active Auroral Research Program [C] . Bailey, P.G., Worthington, Energy Conversion Engineering Conference, 1997. IECEC-97., Proceedings of the 32nd Intersociety . 1997

机译：HAARP技术的历史和应用：高频主动极光研究计划
5. Part I. Magnetic circular dichroism studies of cytochrome c peroxidase from yeast: Investigations of the active site heme coordination sphere through comparison with horseradish peroxidase and myoglobin. Part II. Examination of the heme active site coordination structure of the cavity mutants of myoglobin (H93G), cytochrome c peroxidase (H175G), and heme oxygenase (H25A) and structural investigation of thiolate-ligated cytochrome c peroxidase in the H17C/D235L double mutant. [D] . Pond, Alycen Easterling. 1999

机译：第一部分。酵母中细胞色素C过氧化物酶的磁性圆二色性研究：通过与辣根过氧化物酶和肌红蛋白的比较，研究了活性部位血红素配位域。第二部分检查肌红蛋白（H93G），细胞色素c过氧化物酶（H175G）和血红素加氧酶（H25A）的空腔突变体的血红素活性位点配位结构，以及H17C / D235L双突变体中硫醇盐连接的细胞色素c过氧化物酶的结构研究。
6. Threshold occupancy and specific cation binding modes in the hammerhead ribozyme active site are required for active conformation [O] . Tai-Sung Lee, George M. Giambaşu, Carlos P. Sosa, -1

机译：阈值占用和特定阳离子结合的核酶活性位点的模式所必需的活性构象
7. Properties of the Stimulated Electromagnetic Emissions During the Inclined High‐Frequency Pumping of the Ionosphere Near the Fourth Electron Gyroharmonic at the High‐Frequency Active Auroral Research Program Facility [O] . A. V. Shindin, S. M. Grach, E. N. Sergeev, 2019

机译：高频活性极光研究计划设施的第四电子陀螺谐波附近电离层倾斜高频泵浦刺激的电磁排放的性质

Electromagnetic Spectrum Occupancy Study of a Potential Transmitter Site for theHF Active Auroral Research Program (HAARP)

摘要

著录项

相似文献

相关主题

期刊订阅