Determining dynamic parameters of different-scale ionospheric irregularities over northern Siberia |
| |
| Institution: | 1. Department of Ophthalmology, Second Affiliated Hospital of Dalian Medical University, Dalian, 116023, China;2. Department of Emergency Medicine, Beijing Chaoyang Hospital, Capital Medical University, Beijing, 100020, China;3. Department of Nutrition and Food Hygiene, School of Public Health, Dalian Medical University, Dalian, 116004, China;4. Institute of Cardiovascular Diseases, First Affiliated Hospital of Dalian Medical University, Dalian, 116000, China;5. School of Optoelectronic Engineering and Instrumentation Science, Dalian University of Technology, Dalian, 116024, China;1. State Key Laboratory of Food Science and Technology, Synergetic Innovation Center of Food Safety and Nutrition, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China;2. Division of Nutritional Sciences, Cornell University, Ithaca, NY 14853, USA;1. Section of Plant Biology, School of Integrative Plant Sciences (SIPS), Cornell University, Ithaca, NY 14853, USA |
| |
| Abstract: | In 1995–1996, observations were carried out at Norilsk (geomagnetic latitude and longitude 64.2°N and 160.4°E) to determine dynamic parameters of irregularities in the high-latitude ionosphere. The short-baseline spaced-receiver method that has been implemented at the ionospheric facility of the Norilsk Integrated Magnetic–Ionospheric Station, provides a means of simultaneously measuring parameters of small-scale irregularities (spatial scale of 3–5 km) by the Similar-Fading Method (SFM), as well as of medium-scale irregularities (time scale of 10–30 min, spatial scale of hundreds of kilometres) by the Statistical Angle-of-arrival and Doppler Method (SADM). About 20 h of the observational data for the F2-layer under quiet geomagnetic conditions (Kp < 3), 20 h under disturbed conditions (Kp ≥ 3) and about 15 h for the sporadic E-layer (Kp ≈ 3) were processed. It has been found that the propagation directions and velocities of different-scale irregularities do not coincide. Small-scale irregularities of the F2-layer travel predominantly eastward or westward. The velocity of the F2-layer irregularities is about 100 m/s, and under disturbed conditions it is up to 200–250 m/s. Small-scale irregularities of the sporadic E-layer travel mostly in the northward direction. It is confirmed that the Es-layer is characterised by high velocities of the irregularities (as high as 1000 m/s). Medium-scale irregularities with periods in the range of 10–30 min travel mostly in a southward direction with velocities of 20–40 m/s. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
