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Long-term trends in f0 F2 over Grahamstown using Neural Networks
Solar activity magnetic activity
2015/9/25
Many authors have claimed to have found long-term trends in f0 F2 , or the lack thereof, for different stations. Such investigations usually involve gross assumptions about the variation of f0 F2 with...
The effects of f0 F2 variability on TEC prediction accuracy
ionopshere ionospheric modelling
2015/9/25
In this paper hourly daily F2-layer critical frequency data recorded at Rome and one minute daily TEC data recorded at Florence were used and the relevant variabiles were calculated. It was concluded ...
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...
Properties of the main trough of the F region derived from Dynamic Explorer 2 data
ionosphere on in-situ electron density
2015/9/25
In winter and equinoctial season nights, the main trough of the F region is an important stable structure of the ionosphere at the border between mid and high latitudes. Therefore it has to be taken i...
Proposals are made for Earth-space and space-space paths to apply the term ?propagation degradation probability?, analogous to ?basic circuit reliability? adopted within the Radiocommunication Sector ...
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 ...
Dynamic Spatial Panel Models: Networks, Common Shocks, and Sequential Exogeneity
Spatial Panel Models Networks
2015/9/24
This paper considers a class of GMM estimators for general dynamic panel models,
allowing for cross sectional dependence due to spatial lags and due to unspecified common shocks. We signiᤙ...
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...
COST 271 Action - Effects of the upper atmosphere on terrestrial and Earth-space communications: introduction
upper atmosphere Space through
2015/9/14
The COST 271 Action («Effects of the Upper Atmosphere on Terrestrial and Earth-space Communications
») within the European ionospheric community has the objectives, embodied in the
Memoran...
A revised method to extract thermospheric parameters from incoherent scatter observations
thermospheric ionization
2015/9/14
Height distribution of ionospheric plasma parameters in the F2-region is closely related to height distribution of the main thermospheric parameters. Therefore, they can be extracted from ionospheric ...
Nowcasting, forecasting and warning for ionospheric propagation: tools and methods
Nowcasting ionospheric propagation
2015/9/14
The paper reviews the work done in the course of the COST 271 Action concerned with the development of tools and methods for forecasting, nowcasting and warning of ionospheric propagation conditions. ...
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...
Total electron content - A key parameterin propagation: measurement and usein ionospheric imaging
parameterin ionosphere
2015/9/14
The paper reports on a series of studies carried out within the COST 271 Action relating to the measurement and use of Total Electron Content (TEC) of the ionosphere over North West Europe.
Total ele...
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...