High-Latitude, Ground-Based Observations of ULF Plasma Waves in the Magnetosphere
نویسندگان
چکیده
منابع مشابه
High-latitude observations of impulse-driven ULF pulsations in the ionosphere and on the ground
We report the simultaneous observation of 1.6– 1.7 mHz pulsations in the ionospheric F-region with the CUTLASS bistatic HF radar and an HF Doppler sounder, on the ground with the IMAGE and SAMNET magnetometer arrays, and in the upstream solar wind. CUTLASS was at the time being operated in a special mode optimized for high resolution studies of ULF waves. A novel use is made of the ground retur...
متن کاملHigh-latitude HF Doppler observations of ULF waves. 1. Waves with large spatial scale sizes
A quantitative study of observations of the ionospheric signatures of magnetospheric ultra low frequency (ULF) waves by a high-latitude (geographic: 69.6°N 19.2°E) high-frequency Doppler sounder has been undertaken. The signatures, which are clearly correlated with pulsations in ground magnetometer data, exhibit periods in the range 100±400 s and have azimuthal wave numbers in the range 3±8. Th...
متن کاملHigh-latitude HF Doppler observations of ULF waves: 2. Waves with small spatial scale sizes
The DOPE (Doppler Pulsation Experiment) HF Doppler sounder located near Tromsù, Norway (geographic: 69.6°N 19.2°E; L = 6.3) is deployed to observe signatures, in the high-latitude ionosphere, of magnetospheric ULF waves. A type of wave has been identi®ed which exhibits no simultaneous ground magnetic signature. They can be subdivided into two classes which occur in the dawn and dusk local time ...
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Ultra-low-frequency (ULF) waves have been observed in the Mercury’s magnetosphere. In this work, Mariner-10 and MESSENGER high resolution magnetic field data are studied with wavelet analysis. Two ULF wave intervals have been selected: 29 March 1974 (Mariner-10) and 14 January 2008 (MESSENGER). Non-stationary oscillations, with strong amplitude and narrow bandwidth have been found. The Mariner-...
متن کاملMapping plasma structures in the high-latitude ionosphere using beacon satellite, incoherent scatter radar and ground-based magnetometer observations
In the autumn of the year 2000, four radio receivers capable of tracking various beacon satellites were set up along the southwestern coast of Greenland. They are used to reconstruct images of the ionospheric plasma density distribution via the tomographic method. In order to test and validate tomographic imaging under the highly variable conditions often prevailing in the high-latitude ionosph...
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ژورنال
عنوان ژورنال: Geophysical Journal International
سال: 1978
ISSN: 0956-540X,1365-246X
DOI: 10.1111/j.1365-246x.1978.tb03745.x