The spatial coherence of travelling ionospheric disturbances at mid-latitudes期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

The spatial coherence of travelling ionospheric disturbances at mid-latitudes

Affiliation:	1. Medical Biochemistry & Molecular Biology Department, Menoufia Faculty of Medicine, Egypt;2. Public Health and Community Medicine, Menoufia Faculty of Medicine, Egypt;3. Chest Diseases and Tuberculosis Department, Menoufia Faculty of Medicine, Egypt;4. Medical Microbiology and Immunology Department, Menoufia Faculty of Medicine, Egypt;5. Clinical Pathology Department, Menoufia Faculty of Medicine, Egypt;6. Internal Medicine Departments, Faculty of Medicine, Menoufia University, Egypt;7. Clinical Pharmacy Department, Faculty of Pharmacy, Tanta University, Egypt;8. Medical Student, Faculty of Medicine, Menoufia University, Egypt;9. Medical Surgical Nursing Department, College of Nursing, Taibah University, Madina, Saudi Arabia;1. Department of Botany, Bioinformatics and Climate Change Impacts Management, Gujarat University, Ahmedabad, Gujarat, India;2. Department of Life Science, School of Sciences, Gujarat University, Ahmedabad, Gujarat, India

Abstract:	A multifrequency HF Doppler sounder and four spaced receivers were operated near Alma-Ata to form a three-dimensional array of reflection points of HF radio waves. The spacings of reflection points ranged from 5 to 80 km in the vertical and from 30 to 65 km in the horizontal. The purpose of the experiment was to estimate the spatial coherence of travelling ionospheric disturbances (TIDs). Estimation of the coherence length (the distance at which the coherence falls to e⁻¹) in both vertical and horizontal planes is carried out. The coherence often shows peaks at frequencies exceeding the Brunt-Väisälä frequency. Measurements of the slant coherencies have given the opportunity to study the coherence as a function of orientation.

Keywords:
本文献已被 ScienceDirect 等数据库收录！

设为首页 | 免责声明 | 关于勤云 | 加入收藏