scholarly journals A Bayesian approach to electric field andE-region neutral wind estimation with the Poker Flat Advanced Modular Incoherent Scatter Radar

Radio Science ◽  
2008 ◽  
Vol 43 (5) ◽  
pp. n/a-n/a ◽  
Author(s):  
Craig J. Heinselman ◽  
Michael J. Nicolls
Keyword(s):  
Electric Field ◽  
Bayesian Approach ◽  
Neutral Wind ◽  
Incoherent Scatter Radar ◽  
Wind Estimation ◽  
Incoherent Scatter ◽  
Scatter Radar

scholarly journals Using incoherent scatter radar to investigate the neutral wind long-term trend over Arecibo

2011 ◽  
Vol 116 (A2) ◽  
pp. n/a-n/a ◽  
Author(s):  
P. T. Santos ◽  
C. G. M. Brum ◽  
C. A. Tepley ◽  
N. Aponte ◽  
S. A. González ◽  
...  
Keyword(s):  
Neutral Wind ◽  
Incoherent Scatter Radar ◽  
Term Trend ◽  
Incoherent Scatter ◽  
Scatter Radar ◽  
Long Term Trend

scholarly journals Estimating the vector electric field using monostatic, multibeam incoherent scatter radar measurements

Radio Science ◽  
2014 ◽  
Vol 49 (11) ◽  
pp. 1124-1139 ◽  
Author(s):  
Michael J. Nicolls ◽  
Russell Cosgrove ◽  
Hasan Bahcivan
Keyword(s):  
Electric Field ◽  
Incoherent Scatter Radar ◽  
Incoherent Scatter ◽  
Scatter Radar ◽  
Radar Measurements

scholarly journals Poker Flat Incoherent Scatter Radar observations of anomalous electron heating in the E region

2013 ◽  
Vol 31 (7) ◽  
pp. 1163-1176 ◽  
Author(s):  
R. A. Makarevich ◽  
A. V. Koustov ◽  
M. J. Nicolls
Keyword(s):  
Electric Field ◽  
Electron Temperature ◽  
Electric Fields ◽  
Linear Trend ◽  
Incoherent Scatter Radar ◽  
Electron Heating ◽  
Incoherent Scatter ◽  
Convection Electric Field ◽  
Scatter Radar ◽  
E Region

Abstract. A comprehensive 2-year dataset collected with the Poker Flat Incoherent Scatter Radar (PFISR) located near Fairbanks, Alaska (MLAT = 65.4° N) is employed to identify and analyse 22 events of anomalous electron heating (AEH) in the auroral E region. The overall AEH occurrence probability is conservatively estimated to be 0.3% from nearly-continuous observations of the E region by PFISR, although it increases to 0.7–0.9% in the dawn and dusk sectors where all AEH events were observed. The AEH occurrence variation with MLT is broadly consistent with those of events with high convection velocity (>1000 m s−1) or electron temperature (> 800 K), except for much smaller AEH probability and absence of AEH events near magnetic midnight. This suggests that high convection electric field by itself is necessary but not sufficient for measurable electron heating by two-stream plasma waves. The multi-point observations are utilised to investigate the fundamental dependence of the electron temperature on the convection electric field, focusing on the previously-proposed saturation effects at extreme electric fields. The AEH dataset was found to exhibit considerable scatter and, on average, similar rate of the electron temperature increase with the electric field up to 100 mV m−1 as compared with previous studies. At higher (highest) electric fields, the electron temperatures are below the linear trend on average (within uncertainty). By employing a simple fluid model of AEH, it is demonstrated that some of this deviation from the linear trend may be due to a stronger vibrational cooling at very large temperatures and electric fields.

scholarly journals Incoherent scatter radar observation of E-region vertical electric field at Arecibo

2011 ◽  
Vol 38 (1) ◽  
pp. n/a-n/a ◽  
Author(s):  
Q. H. Zhou ◽  
Y. T. Morton ◽  
C. M. Huang ◽  
N. Aponte ◽  
M. Sulzer ◽  
...  
Keyword(s):  
Electric Field ◽  
Radar Observation ◽  
Incoherent Scatter Radar ◽  
Incoherent Scatter ◽  
Scatter Radar ◽  
Vertical Electric Field ◽  
E Region

The dynamic cusp at low altitudes: a case study utilizing Viking, DMSP-F7, and Sondrestrom incoherent scatter radar observations

1994 ◽  
Vol 12 (12) ◽  
pp. 1144-1157 ◽  
Author(s):  
J. Watermann ◽  
O. de la Beaujardière ◽  
D. Lummerzheim ◽  
J. Woch ◽  
P. T. Newell ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Electric Field ◽  
Plasma Density ◽  
Field Measurements ◽  
Incoherent Scatter Radar ◽  
Radar Observations ◽  
Incoherent Scatter ◽  
Scatter Radar ◽  
Magnetospheric Cusp ◽  
The Imf

Abstract. Coincident multi-instrument magnetospheric and ionospheric observations have made it possible to determine the position of the ionospheric footprint of the magnetospheric cusp and to monitor its evolution over time. The data used include charged particle and magnetic field measurements from the Earth-orbiting Viking and DMSP-F7 satellites, electric field measurements from Viking, interplanetary magnetic field and plasma data from IMP-8, and Sondrestrom incoherent scatter radar observations of the ionospheric plasma density, temperature, and convection. Viking detected cusp precipitation poleward of 75.5° invariant latitude. The ionospheric response to the observed electron precipitation was simulated using an auroral model. It predicts enhanced plasma density and elevated electron temperature in the upper E- and F-regions. Sondrestrom radar observations are in agreement with the predictions. The radar detected a cusp signature on each of five consecutive antenna elevation scans covering 1.2 h local time. The cusp appeared to be about 2° invariant latitude wide, and its ionospheric footprint shifted equatorward by nearly 2° during this time, possibly influenced by an overall decrease in the IMF Bz component. The radar plasma drift data and the Viking magnetic and electric field data suggest that the cusp was associated with a continuous, rather than a patchy, merging between the IMF and the geomagnetic field.

Assessing auroral electric field variance with coherent and incoherent scatter radar

2009 ◽  
Vol 71 (6-7) ◽  
pp. 697-707 ◽  
Author(s):  
D.L. Hysell ◽  
G. Michhue ◽  
M.J. Nicolls ◽  
C.J. Heinselman ◽  
M.F. Larsen
Keyword(s):  
Electric Field ◽  
Incoherent Scatter Radar ◽  
Incoherent Scatter ◽  
Scatter Radar
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