Conjugate observation of periodic VLF emissions near L=6
スポンサーリンク
概要
- 論文の詳細を見る
Conjugate observation of VLF emission was carried out at Kitdalen (69.1°N, 20.3°E geographic, 65.5°N, 105.3°E geomagnetic, L=6.0) in Norway and at Syowa Station (69.0°S, 39.6°E geographic, 66.2°S, 70.5°E geomagnetic, L=6.1) in Antarctica in February 1980,and also at Andφya (69.2°N, 16.0°E geographic, 66.0°N, 102.2°E geomagnetic, L=6.1) in Norway and at Syowa in March 1982. During these campaign periods, periodic VLF emissions were often observed at both stations in opposite hemispheres. A typical periodic emission event observed at both stations was chosen for cross spectral analysis of the emission period. The results show the characteristics of "symmetrical three-phase emission" reported by BRICE (Radio Sci., 69D, 257,1965) as three wave packets, which were symmetrically spaced along the line of force, were echoing in the magnetosphere. Though the geomagnetically conjugate point of Syowa is located about 1800km far from Kitdalen or Andφya, the common nature of the emissions observed at both stations suggests that the periodic emission which originates from the common source in the magnetosphere can spread more than 1800km at the ionospheric level. This observational result is compared with the ray tracing calculation. It is concluded that if the periodic emissions are guided by a field-aligned duct and the duct is terminated at an altitude of 6000km, the periodic emissions can spread as far as the observed distance.
- 国立極地研究所の論文
著者
-
Yoshino Takeo
University of Electro-Communications
-
Yamagishi Hisao
National Institude of Polar Research
-
Fukunishi Hiroshi
National Institute of Polar Research
-
KOJIMA Toshiharu
Mitsubishi Electric Company
-
Kojima Toshiharu
University of Electro-Communications
-
Fukunishi Hiroshi
Faculty Of Science Tohoku University
-
Fukunishi Hiroshi
Upper Atmosphere And Space Research Laboratory Tohoku University
-
Gendrin Roger
Centre de Recherches en Physique de l'Environnement, Terreste et Planetaire, CNET
-
Gendrin Roger
Centre De Recherches En Physique De L'environnement Centre National D'etudes Des Telecommu
-
Gendrin Roger
Centre De Recherches En Physique De L'environnement Terreste Et Planetaire Cnet
関連論文
- Detection of clouds in Antarctica from infrared multispectral data of AVHRR (abstract)
- Extraction of clouds from satellite imagery in the Antarctic (abstract)
- Atmospheric effects against the surface temperature measurement by AVHRR in the polar region
- Observations of total ozone amounts and lower stratospheric temperatures during a stratospheric sudden warming in the Antarctic by TOVS of NOAA-7
- Calculation of the transmission function for remote sensing by meteorological satellite (extended abstract)
- VHF data transmission experiments using MBC equipment conducted during the period from JARE-43 to JARE-45
- Meteor Burst Communications in Antarctica : Description of Experiments and First Results(Terrestrial Radio Communications)
- Characteristics of polarization of geomagnetic sudden commencements observed at Syowa Station
- Characteristics of polarization of geomagnetic sudden commencements at geostationary orbit
- Lidar observations of the Antarctic stratospheric aerosols
- Laser Radar Monitoring of the Polar Middle Atmosphere
- High energy electron observation by Polar Patrol Balloon flight in Antarctica
- Auroral zone X-ray pulsations associated with VLF pulsations: B15-3N balloon experiment
- Polar Patrol Balloon experiment in Antarctica during 2002-2003
- On the satellite remote measurements of vertical temperatude profile of the Antarctic atmosphere
- Observations of hard X-rays of auroral origin with Polar Patrol Balloons No. 8 and 10
- Experiments on meteor burst communications in the Antarctic
- MHD wave characteristics inferred from correlations between X-rays, VLF, and ULFs at Syowa Station, Antarctica and Tjornes, Iceland (L-6)
- Correlations between X-rays, VLF emissions and magnetic pulsations observed at Syowa-Tjornes conjugate-pair stations near L 〜 6 (extended abstract)
- Balloon measurement of electric fields near the Harang discontinuity
- X-ray intensity, ozone density, and VLF wave intensity observed by scientific balloon experiments at Esrange
- ULF waves and magnetic field characteristics in the polar cusp observed at Godhavn
- Characteristics of polar mesosphere summer echoes observed with oblique incidence HF radars at Syowa Station
- E region echoes observed with the Syowa HF radar under disturbed geomagnetic conditions
- Implications of statistics of near-range Doppler velocity observed with the Syowa East HF radar
- Statistical study of Doppler velocity and echo power around 75゜ magnetic latitude using data obtained with the Syowa East HF radar in 1997
- Simultaneous quasi-periodic optical and HF radar signatures observed in the postnoon sector
- Statistical analysis of echo power, Doppler velocity and spectral width obtained with the Syowa South HF radar
- Polar cap patches and auroral blobs observed with Antarctic HF radars: Preliminary results
- Averaged pattern of ionospheric echo region and convection: Initial results from the Syowa Station HF radar
- HF radar experiment at Syowa Station for the study of high-latitude ionosphere-2: A capability (extended abstract)
- Simultaneous observation of radar aurora and visible aurora over Mizuno Station
- Spatial Characteristics of Bremsstrahlung X-Rays Associated with VLF Emissions
- Auroral X-ray images observed by B15-3 balloon over Syowa Station, Antarctica
- Measurement of Auroral Electric Fields with an Antarctic Sounding Rocket S-310JA-7. 1.DC Electric Field
- Simultaneous Observations of Aurora with a Doppler-Radar and Sounding Rockets
- Measurement of Auroral Electric Fields with an Antarctic Sounding Rocket S-310JA-7. 2.AC Electric Field
- Large Displacements of Conjugate Auroras in the Midnight Sector
- Systematic analysis of auroral conjugacy: An application to periodic pulsating aurora (extended abstract)
- Absence of Correlation between Periodic Pulsating Auroras in Geomagnetically Conjugate Areas
- Localization of VLF ionospheric exit point by comparison of multipoint ground-based observation with full-wave analysis
- Unmanned Magnetometer Network Observation in the 44th Japanese Antarctic Research Expedition: Initial Results and an Event Study on Auroral Substorm Evolution
- Cusp-latitude conjugate ionospheric absorption associated with increase of solar wind dynamic pressure during strong northward IMF-a case study
- A new method for monitoring and removing SuperDARN radar DC offsets
- New sounding modes for SuperDARN HF radars
- Conjugate features of daytime absorption associated with specific changes in the solar wind observed by inter-hemispheric high-latitude imaging riometers
- Interhemispheric conjugacy of auroral poleward expansion observed by conjugate imaging riometers at 67゜ and 75゜- 77゜ invariant latitude
- Electrostatic Plasma Instabilities in Highly Active Aurora Observed by a Sounding Rocket S-310JA-7
- Observations Results of Electron Density Profile by S-310JA-7 Rocket
- Geomagnetic Field Observation Using Fluxgate Magnetometer System Onboard Balloons in Antarctica
- High resolution auroral absorption measurement with scanning-beam riometer at L=6.1
- MF radar observations of antarctic mesosphere and lower thermosphere
- Fast equatorward separatrix motion in the nightside ionosphere just prior to substorm onsets (extended abstract)
- Localized bursty plasma flow in the nightside ionosphere ─Implication for distant tail reconnection (extended abstract)
- Height variations of auroral hiss observed by S-310JA-11 and 12 rockets
- Full wave calculation for a Gaussian VLF wave injection into the ionospherer
- Conjugate imaging riometer observation at polar cusp/cap stations: A daytime absorption event for a specific change of solar wind conditions (scientific paper)
- Initial results of imaging riometer observations at polar cap conjugate stations
- Polar cleft structure and SEC associated plasma irregularities observed by Greenland rocket experiment, 1976
- Comparative analysis of electron density and electric field fluctuations in highly active auroras observed by a sounding rocket S-310JA-12: Preliminary results
- Attitude determination of the Antarctic sounding rockets S-310JA-11 and -12
- Measurement of auroral magnetic field with the Antarctic sounding rocket S-310JA-12
- Conjugate observation of periodic VLF emissions near L=6
- Comparison between prenoon and postnoon auroras during quiet and disturbed conditions (extended abstract)
- Auroral dynamics in the polar cap region
- Measurements of the Directions of Propagation Vector and Poynting Flux of Auroral Hiss by Means of the S-310JA-5 Rocket
- The Results of Auroral Sounding with S-310JA-4 Rocket: Electric Field, Particle and Waves
- Synthetic Observations of High-Latitude Ionosphere by S-310JA-4 Sounding Rocket
- SUBSTORMS DURING THE IMS PERIOD OBSERVED BY SOUNDING ROCKETS
- ISIS-I and ISIS-II observation of emissions triggered by doppler-shifted Norway Omega signals
- Statistical feature of non-ducted Omega signal and associated ASE observed by ISIS-I and -II satellites
- Geomagnetic effect on electromagnetic field strength of power line radiation over northern Europe observed on the balloons B15-1N and B15-2N
- Rocket observations of modulations of the low energy electron flux in the auroral ionosphere
- Rocket Measurement of Auroral keV Electron Fluxes in Antarctica
- keV Electron Microbursts above Auroral Arcs
- High latitude aurora observed at Godhavn
- Time-sharing measurements of ionospheric electron temperature and electron density with the electric field using double probes: An experiment on the Antarctic sounding rocket S-310JA-7
- UPPER ATMOSPHERE PHYSICS DATA, SYOWA STATION, 1986
- Upper atmosphere physics data, Syowa Station, 1986(Upper Atmosphere Physics 6)
- UPPER ATMOSPHERE PHYSICS DATA, SYOWA STATION, 1985
- Upper atmosphere physics data, Syowa Station, 1985(Upper Atmosphere Physics 5)
- Initial observation results with imaging riometer at Ny-Alesund (L=16)
- Latitudinal features of cosmic noise absorption at the time of SSC-triggered substorm as observed with scanning beam riometer
- Drift of auroral absorption observed in February 1986 with the scanning beam riometer at Syowa Station
- Near-realtime data collection from Syowa Station and its utilizationfor space weather forecast (extended abstract)
- New auroral spectrometer using an acousto-optic tunable filter
- Observation of electron density in the auroral ionosphere-Results of the Antarctic rockets S-310JA-11 and -12
- Observations of Electron Density in the Polar Ionosphere Using the Swept Frequency Impedance Probe
- Upper Atomosphere Physics Data Obtained at Syowa Station in 2005
- ELF Emissions in High Latitudes-Ray Path Calculation and Ground-Satellite Observations
- Dual Satellite Observations of Auroral Hiss and Saucer Emissions above the Southern Auroral Zone
- A rectified response of daytime radio wave absorption to southward and northward excursions during northward interplanetary magnetic field: A case study
- Correlation analysis of electric field and electron density fluctuations observed by a sounding rocket S-310JA-7
- Statistical characteristics of narrow-banded ELF emissions observed on board ISIS satellite
- Rocket Measurements of Auroral-Zone Energetic Electrons at Syowa Station, Antarctica. II. Characteristics of Electrons under Active Auroral Conditions
- SELECTED RESULTS OBTAINED AT SYOWA STATION, ANTARCTICA, BY RECEPTION OF KYOKKO AND ISIS SATELLITE DATA
- Power line radiation over northern Europe observed on the balloon B15-1N
- Radio Echo Sounding of Antarctic Ice
- A modulation of Pc 3 amplitude and associated auroral precipitation (extended abstract)
- A 6.7-s quasi-periodic fluctuation of auroral X-rays observed at rocket altitudes