scholarly journals Optimal interpolation analysis of high-latitude ionospheric Hall and Pedersen conductivities: Application to assimilative ionospheric electrodynamics reconstruction

2016 ◽  
Vol 121 (5) ◽  
pp. 4898-4923 ◽  
Author(s):  
Ryan McGranaghan ◽  
Delores J. Knipp ◽  
Tomoko Matsuo ◽  
Ellen Cousins
Keyword(s):  
High Latitude ◽  
Optimal Interpolation ◽  
Ionospheric Electrodynamics ◽  
Interpolation Analysis

scholarly journals Space Weather Modeling Capabilities Assessment: Auroral Precipitation and High‐Latitude Ionospheric Electrodynamics

Space Weather ◽  
2019 ◽  
Vol 17 (2) ◽  
pp. 212-215 ◽  
Author(s):  
Robert Robinson ◽  
Yongliang Zhang ◽  
Katherine Garcia‐Sage ◽  
Xiaohua Fang ◽  
Olga P. Verkhoglyadova ◽  
...  
Keyword(s):  
Space Weather ◽  
High Latitude ◽  
Ionospheric Electrodynamics ◽  
Weather Modeling

scholarly journals Towards understanding the electrodynamics of the 3-dimensional high-latitude ionosphere: present and future

2008 ◽  
Vol 26 (12) ◽  
pp. 3913-3932 ◽  
Author(s):  
O. Amm ◽  
A. Aruliah ◽  
S. C. Buchert ◽  
R. Fujii ◽  
J. W. Gjerloev ◽  
...  
Keyword(s):  
Data Analysis ◽  
High Latitude ◽  
Two Dimensions ◽  
Three Dimensions ◽  
Neutral Atmosphere ◽  
3 Dimensional ◽  
Simulation Techniques ◽  
Ionospheric Electrodynamics ◽  
High Latitude Ionosphere ◽  
Ionospheric Modelling

Abstract. Traditionally, due to observational constraints, ionospheric modelling and data analysis techniques have been devised either in one dimension (e.g. along a single radar beam), or in two dimensions (e.g. over a network of magnetometers). With new upcoming missions like the Swarm ionospheric multi-satellite project, or the EISCAT 3-D project, the time has come to take into account variations in all three dimensions simultaneously, as they occur in the real ionosphere. The link between ionospheric electrodynamics and the neutral atmosphere circulation which has gained increasing interest in the recent years also intrinsically requires a truly 3-dimensional (3-D) description. In this paper, we identify five major science questions that need to be addressed by 3-D ionospheric modelling and data analysis. We briefly review what proceedings in the young field of 3-D ionospheric electrodynamics have been made in the past to address these selected question, and we outline how these issues can be addressed in the future with additional observations and/or improved data analysis and simulation techniques. Throughout the paper, we limit the discussion to high-latitude and mesoscale ionospheric electrodynamics, and to directly data-driven (not statistical) data analysis.

Optimal interpolation analysis of leaf area index using MODIS data

2006 ◽  
Vol 104 (3) ◽  
pp. 283-296 ◽  
Author(s):  
Yingxin Gu ◽  
Stéphane Bélair ◽  
Jean-François Mahfouf ◽  
Godelieve Deblonde
Keyword(s):  
Leaf Area Index ◽  
Leaf Area ◽  
Optimal Interpolation ◽  
Area Index ◽  
Modis Data ◽  
Interpolation Analysis

Inverse procedure for high‐latitude ionospheric electrodynamics: Analysis of satellite‐borne magnetometer data

2015 ◽  
Vol 120 (6) ◽  
pp. 5241-5251 ◽  
Author(s):  
Tomoko Matsuo ◽  
Delores J. Knipp ◽  
Arthur D. Richmond ◽  
Liam Kilcommons ◽  
Brian J. Anderson
Keyword(s):  
High Latitude ◽  
Ionospheric Electrodynamics ◽  
Magnetometer Data ◽  
Inverse Procedure

Mapping high-latitude ionospheric electrodynamics with SuperDARN and AMPERE

2015 ◽  
Vol 120 (7) ◽  
pp. 5854-5870 ◽  
Author(s):  
E. D. P. Cousins ◽  
Tomoko Matsuo ◽  
A. D. Richmond
Keyword(s):  
High Latitude ◽  
Ionospheric Electrodynamics

Dayside ionospheric electrodynamics in association with high-latitude dayside aurora (HiLDA)

2021 ◽  
Author(s):  
Lei Cai ◽  
Anita Kullen ◽  
Tomas Karlson ◽  
Andris Vaivads ◽  
Yongliang Zhang
Keyword(s):  
High Latitude ◽  
Large Scale ◽  
Potential Drop ◽  
Polar Cap ◽  
Ionospheric Electrodynamics ◽  
Defense Meteorological Satellite Program ◽  
Current Region ◽  
Fine Structures ◽  
Field Aligned Current ◽  
Set Up

<p>The Defense Meteorological Satellite Program (DMSP) Special Sensor Ultraviolet Spectrographic Imager (SSUSI) has observed the large-scale high-latitude dayside aurora (HiLDA) during its long lifetime of hours. HiLDA has dynamical changes in form, size, location, and development of fine structures. However, the associated electrodynamics is not fully understood. In general, HiLDA occurs in the dayside polar cap during IMF By+ (By-) prevailing conditions in the sunlit northern (southern) hemisphere.  The prevailing conditions drive strong upward field-aligned current in the polar cap. Within the upward field-aligned current region, the field-aligned potential drop can be set up and accelerate the electrons, forming the monoenergetic electron precipitation (up to 10s keV) and producing HiLDA.</p><p> </p><p>This study investigates the ionospheric flows, currents, and auroral precipitation in association with HiLDA, benified from the simultaneous measurements from the DMSP satellites, the AMPERE project, and ground-based magnetometers and SuperDARN coherent radars. We will show HiLDA interacts with duskside oval-aligned arcs or transpolar arcs. The interactions are associated with the cusp and the dayside reconnection at the duskside flank/high latitudes. The reconnection produces strong dusk-dawn convection with flow shears in the polar cap, which generates the upward Region 0 current. We find that HiLDA is formed in the high-latitude part of the upward Region 0 current. We apply the Knight relation and identify the lobe electrons (< 0.3 cm<sup>-3</sup>) as the source of HiLDA. The fine structures revealed in the emission intensity of HiLDA may suggest the uneven distribution of the electron density in the high-latitude lobe.</p>

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