Number of found documents: 130
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Sources of the cusp plasma for the different sign of IMF By
Šimůnek, Jiří; Šafránková, J.; Němeček, Z.; Wing, S.
2002 - English
The importance of the interplanetary magnetic field (IMF) direction for the cusp formation was dicovered a long time ago. A sign of the IMF Bz component is believed to be responsible for a location of the plasma entry into the cusp. The paper uses the INTERBALL-1 and MAGION-4 data to study the high-altitude cusp topology for different IMF By orientations. The study reveals the importance of IMF horizontal components on the cusp configuration as well as on small-scale processes at the outer cusp. We discuss an influence of the tilt angle of the Earth's dipole on these processes. Keywords: cusp plasma; magnetopause; INTERBALL-1 Available at various institutes of the ASCR
Sources of the cusp plasma for the different sign of IMF By

The importance of the interplanetary magnetic field (IMF) direction for the cusp formation was dicovered a long time ago. A sign of the IMF Bz component is believed to be responsible for a location of ...

Šimůnek, Jiří; Šafránková, J.; Němeček, Z.; Wing, S.
Ústav fyziky atmosféry, 2002

LHR associated oblique noise bands
Chum, Jaroslav; Jiříček, František; Shklyar, D.
2002 - English
Observations onboard the Magion-5 satellite revealed oblique noise bands above the local Lower Hybrid Resonance (LHR) frequency - wave phenomena, which (to the best of authors' knowledge) have not been discussed yet. Examples of such oblique bands, both in review (large time-scale) spectrograms, and in detailed (small time-scale) spectrograms are presented. Based on ray-tracing simulations, an explanation of these oblique bands is suggested. Keywords: lower hybrid resonance; MAGION-5; plasmapause Available at various institutes of the ASCR
LHR associated oblique noise bands

Observations onboard the Magion-5 satellite revealed oblique noise bands above the local Lower Hybrid Resonance (LHR) frequency - wave phenomena, which (to the best of authors' knowledge) have not ...

Chum, Jaroslav; Jiříček, František; Shklyar, D.
Ústav fyziky atmosféry, 2002

PERUN - the System for the Crop Yield Forecasting
Dubrovský, Martin; Žalud, Z.; Trnka, M.; Pešice, Petr; Haberle, J.
2002 - English
PERUN 1.0 is the Windows-based system for probabilistic crop yield forecasting. It is based on crop growth model WOFOST. The weather series is prepared by a stochastic weather generator Met&Roll with parameters that are derived from the observed series. Keywords: forecasting; crop model; weather generator Available at various institutes of the ASCR
PERUN - the System for the Crop Yield Forecasting

PERUN 1.0 is the Windows-based system for probabilistic crop yield forecasting. It is based on crop growth model WOFOST. The weather series is prepared by a stochastic weather generator Met&Roll with ...

Dubrovský, Martin; Žalud, Z.; Trnka, M.; Pešice, Petr; Haberle, J.
Ústav fyziky atmosféry, 2002

Meteorological elements in the growth and development of selected cereal crop - applicability of regression analysis method
Trnka, M.; Žalud, Z.; Semerádová, Daniela; Dubrovský, Martin
2002 - English
Relationships between meteorological elements and the growth and development characteristics of selected cereal crop is assessed. Keywords: regression analysis; spring barley Available at various institutes of the ASCR
Meteorological elements in the growth and development of selected cereal crop - applicability of regression analysis method

Relationships between meteorological elements and the growth and development characteristics of selected cereal crop is assessed.

Trnka, M.; Žalud, Z.; Semerádová, Daniela; Dubrovský, Martin
Ústav fyziky atmosféry, 2002

Performance and Reliability of Advanced Telecommunication Systems Using Millimetre Wavelengths in the Czech Republic
Kvičera, V.; Fišer, Ondřej; Mazánek, M.
2001 - English
This contribution informs about the launched GACR grant, its aims and methods. The aim is to improve the radio link planning with respect to the influence of the atmosphere. Particular topics are: radio refractive study and measurements, long term rain rate statistics and its stability, experimental measurement of attenuation on 58 GHz link and comparison of predicted and measured atmospheric attenuation. Keywords: radio wave propagation; atmospheric attenaation; refractive index Available at various institutes of the ASCR
Performance and Reliability of Advanced Telecommunication Systems Using Millimetre Wavelengths in the Czech Republic

This contribution informs about the launched GACR grant, its aims and methods. The aim is to improve the radio link planning with respect to the influence of the atmosphere. Particular topics are: ...

Kvičera, V.; Fišer, Ondřej; Mazánek, M.
Ústav fyziky atmosféry, 2001

Response of the outer cusp to the IMF rotation
Šimůnek, Jiří; Šafránková, J.; Němeček, Z.
2001 - English
The paper uses the INTERBALL-1 and MAGION=4 data to study the topology and dynamics of high-altitude cusp regions under changing solar wind conditions and interplanetary magnetic field (IMF) orientation. Preliminary analysis of the MAGION-4 ion energy spectra indicates the presence of the magnetosheath-like plasma well below the expected magnetopause position and a large region occupied by low-temperature dense plasma with the very low bulk velocity near the magnetopause. Keywords: two point observations; high-altitude cusp; two-point observations Available at various institutes of the ASCR
Response of the outer cusp to the IMF rotation

The paper uses the INTERBALL-1 and MAGION=4 data to study the topology and dynamics of high-altitude cusp regions under changing solar wind conditions and interplanetary magnetic field (IMF) ...

Šimůnek, Jiří; Šafránková, J.; Němeček, Z.
Ústav fyziky atmosféry, 2001

Symmetric probe in drifting plasma
Fiala, Vladimír; Jásenský, Václav; Váňa, Ondřej
2001 - English
Here we are presenting a preliminary study of a probe designed for measurement of plasma drift by means of a transfer impedance probe operated near oblique resonance in a magnetized plasma. Keywords: plasma drift; Symmetric Probe; resonance cones Available at various institutes of the ASCR
Symmetric probe in drifting plasma

Here we are presenting a preliminary study of a probe designed for measurement of plasma drift by means of a transfer impedance probe operated near oblique resonance in a magnetized plasma.

Fiala, Vladimír; Jásenský, Václav; Váňa, Ondřej
Ústav fyziky atmosféry, 2001

Numerical simulations of strong Turbulence
Jásenský, Václav; Trávníček, Pavel; Váňa, Ondřej
2001 - English
The algorithm developed and tested in our previous paper (Jásenský et al.) for numerical solving of Zakharov equations is used for simulations of strong turbulence. The creation and anihilation of caverns is observed in order to predictions of Zakharov and Robinson theory. Keywords: Strong Turbulence; Zakharov Equations; Numeric Simulations Solitons Available at various institutes of the ASCR
Numerical simulations of strong Turbulence

The algorithm developed and tested in our previous paper (Jásenský et al.) for numerical solving of Zakharov equations is used for simulations of strong turbulence. The creation and anihilation of ...

Jásenský, Václav; Trávníček, Pavel; Váňa, Ondřej
Ústav fyziky atmosféry, 2001

Research of Rain Rate Statistics, Rain Type Recognition and Radio Refractive Index Computation in Space in order to improve the Radiocommunication Planning
Fišer, Ondřej
2001 - English
This contribution informs about the contribution of the Institute of Atmospheric Physics in Prague to the described grant of GACR. Particularly it is: radio refractive index study, long term rain rate statistics and its stability as well as rain rate measurements, rain type assessment and experimental measurement of attenuation on 58 GHz link. Keywords: radio wave propagation; atmospheric attenaation; refractive index Available at various institutes of the ASCR
Research of Rain Rate Statistics, Rain Type Recognition and Radio Refractive Index Computation in Space in order to improve the Radiocommunication Planning

This contribution informs about the contribution of the Institute of Atmospheric Physics in Prague to the described grant of GACR. Particularly it is: radio refractive index study, long term rain rate ...

Fišer, Ondřej
Ústav fyziky atmosféry, 2001

Basic Study of the Radio Refractive Index Values in CZ and Sensitivity Tests
Fišer, Ondřej
2001 - English
The radio refractive index was computed from the data of radio soundings in Prague and the statistical results are shown. Keywords: radio wave propagation; measurements; refractive index Available at various institutes of the ASCR
Basic Study of the Radio Refractive Index Values in CZ and Sensitivity Tests

The radio refractive index was computed from the data of radio soundings in Prague and the statistical results are shown.

Fišer, Ondřej
Ústav fyziky atmosféry, 2001

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