scholarly journals Space Plasma Exploration by Active Radar (SPEAR): an overview of a future radar facility

2000 ◽  
Vol 18 (9) ◽  
pp. 1248-1255 ◽  
Author(s):  
D. M. Wright ◽  
J. A. Davies ◽  
T. R. Robinson ◽  
P. J. Chapman ◽  
T. K. Yeoman ◽  
...  
Keyword(s):  
Plasma Physics ◽  
Space Plasma ◽  
Hf Radar ◽  
Polar Cap ◽  
Radio Science ◽  
Plasma Irregularities ◽  
Extensive Field ◽  
Instruments And Techniques ◽  
Technical Specifications ◽  
Artificial Plasma

Abstract. SPEAR is a new polar cap HF radar facility which is to be deployed on Svalbard. The principal capabilities of SPEAR will include the generation of artificial plasma irregularities, operation as an 'all-sky' HF radar, the excitation of ULF waves, and remote sounding of the magnetosphere. Operation of SPEAR in conjunction with the multitude of other instruments on Svalbard, including the EISCAT Svalbard radar, and the overlap of its extensive field-of-view with that of several of the HF radars in the SuperDARN network, will enable in-depth diagnosis of many geophysical and plasma phenomena associated with the cusp region and the substorm expansion phase. Moreover, its ability to produce artificial radar aurora will provide a means for the other instruments to undertake polar cap plasma physics experiments in a controlled manner. Another potential use of the facility is in 'field-line tagging' experiments, for coordinated ground-satellite experiments. Here the scientific objectives of SPEAR are detailed, along with the proposed technical specifications of the system.Key words: Ionosphere (active experiments) – Radio science (instruments and techniques) – Space plasma physics (instruments and techniques)

scholarly journals <i>Letter to the Editor:</i> First complementary observations by ionospheric tomography, the EISCAT Svalbard radar and the CUTLASS HF radar

1998 ◽  
Vol 16 (11) ◽  
pp. 1519-1522 ◽  
Author(s):  
C. N. Mitchell ◽  
I. K. Walker ◽  
S. E. Pryse ◽  
I. Kersley ◽  
I. W. McCrea ◽  
...  
Keyword(s):  
Auroral Zone ◽  
Hf Radar ◽  
Auroral Ionosphere ◽  
Polar Cap ◽  
Low Velocity ◽  
Radio Science ◽  
Ionospheric Tomography ◽  
Ionospheric Physics ◽  
Incoherent Scatter ◽  
Complementary Nature

Abstract. Experimental results are presented from ionospheric tomography, the EISCAT Svalbard radar and the CUTLASS HF radar. Tomographic measurements on 10 October 1996, showing a narrow, field-aligned enhancement in electron density in the post-noon sector of the dayside auroral zone, are related to a temporal increase in the plasma concentration observed by the incoherent scatter radar in the region where the HF radar indicated a low velocity sunwards convection. The results demonstrate the complementary nature of these three instruments for polar-cap ionospheric studies.Key words. Ionosphere · Auroral ionosphere · Polar ionosphere · Radio science (ionospheric physics)

scholarly journals Plasma: An International Open Access Journal for All of Plasma Science

Plasma ◽  
2018 ◽  
Vol 1 (1) ◽  
pp. 45-46 ◽  
Author(s):  
David Gates
Keyword(s):  
Open Access ◽  
Plasma Physics ◽  
Plasma Chemistry ◽  
Space Plasma ◽  
Open Access Journal ◽  
Scholarly Journal ◽  
Plasma Science

Plasma is an open access, cross-disciplinary scholarly journal of scientific studies related to all aspects of plasma science, such as plasma physics, plasma chemistry and space plasma[...]

scholarly journals Local wavelet correlation: applicationto timing analysis of multi-satellite CLUSTER data

2004 ◽  
Vol 22 (12) ◽  
pp. 4185-4196 ◽  
Author(s):  
J. Soucek ◽  
T. Dudok de Wit ◽  
M. Dunlop ◽  
P. Décréau
Keyword(s):  
Large Scale ◽  
Timing Analysis ◽  
Stationary Time Series ◽  
Time Lags ◽  
Radio Science ◽  
Large Scale Structures ◽  
Cluster Data ◽  
Instruments And Techniques ◽  
Scale Structures ◽  
Multiple Spacecraft

Abstract. Multi-spacecraft space observations, such as those of CLUSTER, can be used to infer information about local plasma structures by exploiting the timing differences between subsequent encounters of these structures by individual satellites. We introduce a novel wavelet-based technique, the Local Wavelet Correlation (LWC), which allows one to match the corresponding signatures of large-scale structures in the data from multiple spacecraft and determine the relative time shifts between the crossings. The LWC is especially suitable for analysis of strongly non-stationary time series, where it enables one to estimate the time lags in a more robust and systematic way than ordinary cross-correlation techniques. The technique, together with its properties and some examples of its application to timing analysis of bow shock and magnetopause crossing observed by CLUSTER, are presented. We also compare the performance and reliability of the technique with classical discontinuity analysis methods. Key words. Radio science (signal processing) – Space plasma physics (discontinuities; instruments and techniques)

scholarly journals Modelling the solar wind interaction with Mercury by a quasi-neutral hybrid model

2003 ◽  
Vol 21 (11) ◽  
pp. 2133-2145 ◽  
Author(s):  
E. Kallio ◽  
P. Janhunen
Keyword(s):  
Solar Wind ◽  
Plasma Physics ◽  
Hybrid Model ◽  
Space Plasma ◽  
Physical Processes ◽  
Space Plasma Physics ◽  
Solar Wind Interaction ◽  
Plasma Parameters ◽  
Advantages And Disadvantages ◽  
Self Consistent

Abstract. Quasi-neutral hybrid model is a self-consistent modelling approach that includes positively charged particles and an electron fluid. The approach has received an increasing interest in space plasma physics research because it makes it possible to study several plasma physical processes that are difficult or impossible to model by self-consistent fluid models, such as the effects associated with the ions’ finite gyroradius, the velocity difference between different ion species, or the non-Maxwellian velocity distribution function. By now quasi-neutral hybrid models have been used to study the solar wind interaction with the non-magnetised Solar System bodies of Mars, Venus, Titan and comets. Localized, two-dimensional hybrid model runs have also been made to study terrestrial dayside magnetosheath. However, the Hermean plasma environment has not yet been analysed by a global quasi-neutral hybrid model. In this paper we present a new quasi-neutral hybrid model developed to study various processes associated with the Mercury-solar wind interaction. Emphasis is placed on addressing advantages and disadvantages of the approach to study different plasma physical processes near the planet. The basic assumptions of the approach and the algorithms used in the new model are thoroughly presented. Finally, some of the first three-dimensional hybrid model runs made for Mercury are presented. The resulting macroscopic plasma parameters and the morphology of the magnetic field demonstrate the applicability of the new approach to study the Mercury-solar wind interaction globally. In addition, the real advantage of the kinetic hybrid model approach is to study the property of individual ions, and the study clearly demonstrates the large potential of the approach to address these more detailed issues by a quasi-neutral hybrid model in the future.Key words. Magnetospheric physics (planetary magnetospheres; solar wind-magnetosphere interactions) – Space plasma physics (numerical simulation studies)

scholarly journals Mesospheric turbulent velocity estimation using the Buckland Park MF radar

2001 ◽  
Vol 19 (8) ◽  
pp. 1007-1017 ◽  
Author(s):  
D. A. Holdsworth ◽  
R. A. Vincent ◽  
I. M. Reid
Keyword(s):  
Annual Variation ◽  
Middle Atmosphere ◽  
Velocity Estimation ◽  
Turbulent Velocity ◽  
Radio Science ◽  
Meteorology And Atmospheric Dynamics ◽  
Zonal Velocity ◽  
Instruments And Techniques ◽  
Full Correlation Analysis ◽  
Mf Radar

Abstract. This paper investigates turbulent velocity estimation using the full correlation analysis (FCA) of spaced antenna (SA) data, and its application to the routine FCA observations of the Buckland Park MF (BPMF) radar. The effects of transmitter beamwidths are investigated, confirming the suggestions of previous authors that wide transmit beam widths lead to an overestimation of the turbulent velocity. The annual variation of the turbulent velocity is investigated, revealing an increase in turbulent velocity with height, and equinoctal minima and solstice maxima observed below 80 km. Investigations of the turbulent velocities about the March diurnal tide maximum reveals a diurnal variation in phase with the zonal velocity. Harmonic analysis reveals this relationship exists between February and September. Descending power layers are also observed during this period. A number of mechanisms are proposed to describe these observations.Key words. Meteorology and atmospheric dynamics (middle atmosphere dynamics; instruments and techniques) – Radio science (instruments and techniques)

Sign in / Sign up

Export Citation Format

Share Document