搜索结果: 1-15 共查到“地球物理学 Ionosphere”相关记录24条 . 查询时间(0.069 秒)
On the derivation of an hourly local index to define the normal ionosphere
reference ionosphere ionospheric disturbance ionospheric indices
2015/9/30
In this paper an hourly local ionospheric index f n F 2 is proposed to define the normal level of the undisturbed
ionosphere. For the determination of this index a model is developed where the normal...
Mapping plasma structures in the high-latitude ionosphere using beacon satellite, incoherent scatter radar and ground-based magnetometer observations
Beacon satellites ionospheric plasma
2015/9/25
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 ion...
The response of the ionosphere to faint and bright solar flares as deduced from global GPS network data
ionopshere Total Electron Content
2015/9/25
Results derived from analysing the ionosphere response to faint and bright solar flares are presented. The analysis used technology of a global detection of ionospheric effects from solar flares as de...
Electon density profiles of the topside ionosphere
ionograms electron density profiles satellite orbits altitude
2015/9/25
The existing uncertainties about the electron density profiles in the topside ionosphere, i.e., in the height region from h m F 2 to ~ 2000 km, require the search for new data sources. The ISIS and Al...
Could we find any signal of the stratosphere-ionosphere coupling in Antarctica?
ionosphere-stratosphere interaction temperature profiles
2015/9/25
An investigation searching for a possible coupling between the lower ionosphere and the middle atmosphere in Antarctica is here performed on the basis of stratospheric vertical temperature profiles an...
GPS detection of the instantaneous response of the global ionosphere to strong magnetic storms with sudden commencement
Magnetic field strenght ionospheric disturbances
2015/9/25
Using a new technology for global GPS detection of ionospheric disturbances, GLOBDET, it has been established that a drastic increase in the time derivative of the magnetic field strength during magne...
Proposed terminology for the classification and parameters for the quantification of variability in ionosphere morphology
ionosphere ionospheroc terminology space and time variation
2015/9/25
Much uncertainty currently exists in the use by different workers of the term ?variability? in describing the results of statistical analyses applied to ionospheric measurement data sets and in their ...
Impact of the Mt. Pinatubo volcaniceruption on the lower ionosphere andatmospheric waves over Central Europe
volcanic eruption lower ionosphere atmospheric waves radio wave absorption
2015/9/17
The very strong volcanic eruption of Mt. Pinatubo in June 1991 directly affected the troposphere and lower and middle stratosphere. Here we look at its effects in the mesopause region as revealed by t...
GPS radio occultation measurements establish the basis for a new remote sensing technique for vertical profile information on the electron density of the entire ionosphere from satellite orbit
height...
Planetary and gravity wave signatures in the F-region ionosphere with impacton radio propagation predictionsand variability
Radio propagation ionization
2015/9/14
The aim of this work within the WP 3.1 of the COST 271 Action is the characterization of the variability introduced in the F-region ionosphere by -Planetary Wave Signatures- (PWS) and -Gravity Wave
S...
Long-term trends in the ionosphere and upper atmosphere parameters
atmosphere parameters ionosphere
2015/9/14
The first part of the paper is directed to the investigation of the practical importance of possible longterm trends in the F2-layer for ionospheric prediction models. Using observations of about 50 d...
Imaging of the equatorial ionosphere
atmosphere electromagnetic methods remote sensing tomography data processing GPS TEC
2015/9/10
The equatorial anomaly is the dominant structure in free electron concentration in the tropical ionosphere. Due
to its edges (crests) which are characterised by steep latitudinal gradients in TEC and...
Persistence of planetary wave type oscillations in the mid-latitude ionosphere
ionosphere atmosphere interaction mid-latitude ionosphere ionospheric disturbances atmospheric waves
2015/9/8
Planetary wave type oscillations have been observed in the lower and middle atmosphere but also in the ionosphere,
including the ionospheric F2 layer. Here we deal with the oscillations in foF2 analy...
Characteristics of flux-time profiles, temporal evolution, and spatial distribution of radiation-belt electron precipitation bursts in the upper ionosphere before great and giant earthquakes
Earthquake precursors particle precipitation wave particle interactions
2015/8/24
The analysis of energetic electron observations made by the DEMETER satellite reveals that radiation belt electron precipitation (RBEP) bursts are observed in general several (~1-6 days) before a larg...
Attenuation of electromagnetic waves at the frequency ~1.7 kHz in the upper ionosphere observed by the DEMETER satellite in the vicinity of earthquakes
Waves and wave analysis Wave propagation
2015/8/24
The DEMETER satellite was the first satellite specifically dedicated to the recording of electromagnetic phenomena connected with seismic activity. Almost 6.5 years of measurements provide good opport...