G. J. Sofko

5.4k citations

155 papers · 4.4k · 2 hit papers · h-index 29

Impact in

Astronomy and Astrophysics top 0.5%
- Ionosphere and magnetosphere dynamics
- Solar and Space Plasma Dynamics
- Astro and Planetary Science
Geophysics top 1%
- Earthquake Detection and Analysis

Papers in

Astronomy and Astrophysics 141
- Ionosphere and magnetosphere dynamics 141
- Solar and Space Plasma Dynamics 82
Molecular Biology 49
- Geomagnetism and Paleomagnetism Studies 49

Co-authors: R. A. Greenwald (27 shared papers)J. A. Koehler (46 shared papers)J. P. Villain (11 shared papers)M. Pinnock (4 shared papers)W. A. Bristow (10 shared papers)Natsuo Sato (3 shared papers)A. D. M. Walker (3 shared papers)J. M. Ruohoniemi (12 shared papers)
Journals: Journal of Geophysical Research Atmospheres (72 papers)Annales Geophysicae (15 papers)Geophysical Research Letters (13 papers)Radio Science (6 papers)Advances in Space Research (5 papers)
Partner nations: Canada United States United Kingdom

In The Last Decade

G. J. Sofko

147 papers receiving 3.9k citations

G. J. Sofko's Hit Papers

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A decade of the Super Dual Auroral Radar Network (SuperDARN): scientific achievements, new techniques and future directions 2007 · 602 citations

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if any of the following hold:

it has ≥500 total citations;
it reaches ≥1.5× the top-1% citation threshold for papers in the same subfield and year (the threshold is the minimum needed to enter the top 1%, not the average within it);
it reaches the top citation threshold in at least one of its specific research topics.

2007 Surveys in Geophysics
1995 Space Science Reviews

Peers

Countries citing papers authored by G. J. Sofko

Since Specialization

Citations

This map shows the geographic impact of G. J. Sofko's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by G. J. Sofko with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites G. J. Sofko more than expected).

Fields of papers citing papers by G. J. Sofko

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by G. J. Sofko. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by G. J. Sofko. The network helps show where G. J. Sofko may publish in the future.

Co-authors

The 25 scholars most cited alongside G. J. Sofko, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with G. J. Sofko Line = papers co-authored together G. J. Sofko links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

Showing the 20 most-cited of 155 papers — load more, or switch the sort, to bring in the rest.

#	Work
1	DARN/SuperDARN Space Science Reviews ·R. A. Greenwald, K. B. Baker, J. R. Dudeney, M. Pinnock, T. B. Jones, E. C. Thomas, J. P. Villain, J.‐C. Cerisier, C. A. Senior, C. Hanuise, R. D. Hunsucker, G. J. Sofko, J. A. Koehler, E. Nielsen, R. Pellinen, A. D. M. Walker, Natsuo Sato, H. Yamagishi Hit paper breakdown →	1995	982
2	A decade of the Super Dual Auroral Radar Network (SuperDARN): scientific achievements, new techniques and future directions Surveys in Geophysics ·G. Chisham, M. Lester, S. E. Milan, M. P. Freeman, W. A. Bristow, A. Grocott, K. A. McWilliams, J. M. Ruohoniemi, T. K. Yeoman, P. L. Dyson, R. A. Greenwald, Takashi Kikuchi, M. Pinnock, J. P. S. Rash, Natsuo Sato, G. J. Sofko, J. P. Villain, A. D. M. Walker Hit paper breakdown →	2007	602
3	Influence of ionospheric electron density fluctuations on satellite radar interferometry Geophysical Research Letters ·A.L. Gray, K.E. Mattar, G. J. Sofko	2000	205
4	ULF high‐ and low‐m field line resonances observed with the Super Dual Auroral Radar Network Journal of Geophysical Research Atmospheres ·F. R. Fenrich, J. C. Samson, G. J. Sofko, R. A. Greenwald	1995	133
5	Mapping ionospheric backscatter measured by the SuperDARN HF radars – Part 1: A new empirical virtual height model Annales Geophysicae ·G. Chisham, T. K. Yeoman, G. J. Sofko	2008	94
6	Comparison of plasma flow velocities determined by the ionosonde Doppler drift technique, SuperDARN radars, and patch motion Radio Science ·I. F. Grant, J. W. MacDougall, J. M. Ruohoniemi, W. A. Bristow, G. J. Sofko, J. A. Koehler, D. W. Danskin, Daniel André	1995	86
7	Super dual auroral radar network radar imaging of dayside high‐latitude convection under northward interplanetary magnetic field: Toward resolving the distorted two‐cell versus multicell controversy Journal of Geophysical Research Atmospheres ·R. A. Greenwald, W. A. Bristow, G. J. Sofko, C. A. Senior, J.‐C. Cerisier, Á. Szabó	1995	65
8	Direct determination of large‐scale magnetospheric field‐aligned currents with SuperDARN Geophysical Research Letters ·G. J. Sofko, R. A. Greenwald, W. A. Bristow	1995	64
9	A comparison of a model for the theta aurora with observations from Polar, Wind, and SuperDARN Journal of Geophysical Research Atmospheres ·S.‐W. Chang, J. D. Scudder, J. B. Sigwarth, L. A. Frank, N. C. Maynard, W. J. Burke, W. K. Peterson, E. G. Shelley, R. H. W. Friedel, J. B. Blake, R. A. Greenwald, R. P. Lepping, G. J. Sofko, Jacques Villain, M. Lester	1998	61
10	Possible connection of polar cap flows to pre- and post-substorm onset PBIs and streamers Journal of Geophysical Research Atmospheres ·L. R. Lyons, Y. Nishimura, H.-J. Kim, E. Donovan, V. Angelopoulos, G. J. Sofko, M. J. Nicolls, C. J. Heinselman, J. M. Ruohoniemi, Н. Нишитани	2011	57
11	Improvement of SuperDARN velocity measurements by estimating the index of refraction in the scattering region using interferometry Journal of Geophysical Research Atmospheres ·R. G. Gillies, G. C. Hussey, G. J. Sofko, K. A. McWilliams, Robyn Fiori, P. V. Ponomarenko, (unknown)	2009	55
12	Tillage effects on the radar backscattering coefficient of grain stubble fields International Journal of Remote Sensing ·Brian Brisco, R.J. Brown, B. Snider, G. J. Sofko, J. A. Koehler, A. G. Wacker	1991	51
13	On the origin of narrow non‐ion‐acoustic coherent radar spectra in the high‐latitude E region Journal of Geophysical Research Atmospheres ·(unknown), Paul Prikryl, D. W. Danskin, A. M. Hamza, G. J. Sofko, J. A. Koehler, A. V. Kustov, J. Chen	1994	50
14	Preonset time sequence of auroral substorms: Coordinated observations by all‐sky imagers, satellites, and radars Journal of Geophysical Research Atmospheres ·Y. Nishimura, L. R. Lyons, Shasha Zou, X. Xing, V. Angelopoulos, S. B. Mende, J. W. Bonnell, D. E. Larson, U. Auster, Tomoaki Hori, Н. Нишитани, Keisuke Hosokawa, G. J. Sofko, M. J. Nicolls, C. J. Heinselman	2010	49
15	Measuring the dayside reconnection rate during an interval of due northward interplanetary magnetic field Annales Geophysicae ·G. Chisham, M. P. Freeman, I. J. Coleman, M. Pinnock, M. R. Hairston, M. Lester, G. J. Sofko	2004	48
16	Solar‐wind‐driven pulsed magnetic reconnection at the dayside magnetopause, Pc5 compressional oscillations, and field line resonances Journal of Geophysical Research Atmospheres ·Paul Prikryl, R. A. Greenwald, G. J. Sofko, J. P. Villain, C. W. S. Ziesolleck, E. Friis‐Christensen	1998	45
17	Observations of polar patches generated by solar wind Alfvén wave coupling to the dayside magnetosphere Annales Geophysicae ·Paul Prikryl, J. W. MacDougall, I. F. Grant, D. P. Steele, G. J. Sofko, R. A. Greenwald	1999	40
18	Ionospheric refraction effects in slant range profiles of auroral HF coherent echoes Radio Science ·M. V. Uspensky, A. V. Kustov, G. J. Sofko, J. A. Koehler, J. P. Villain, C. Hanuise, J. M. Ruohoniemi, P. J. S. Williams	1994	40
19	Evolution of ionospheric multicell convection during northward interplanetary magnetic field with \|B_z/B_y\| > 1 Journal of Geophysical Research Atmospheres ·Chao‐Song Huang, G. J. Sofko, A. V. Koustov, D. A. Andre, J. M. Ruohoniemi, R. A. Greenwald, M. R. Hairston	2000	39
20	Remote sensing of the spatial and temporal structure of magnetopause and magnetotail reconnection from the ionosphere Reviews of Geophysics ·G. Chisham, M. P. Freeman, Gary Abel, Mai Mai Lam, M. Pinnock, I. J. Coleman, S. E. Milan, M. Lester, W. A. Bristow, R. A. Greenwald, G. J. Sofko, J. P. Villain	2008	39

About G. J. Sofko

G. J. Sofko is a scholar working on Astronomy and Astrophysics, Molecular Biology, Geophysics, Aerospace Engineering and Oceanography, having authored 155 papers that have together received 4.4k indexed citations. Recurring topics across this work include Ionosphere and magnetosphere dynamics (141 papers), Solar and Space Plasma Dynamics (82 papers), Geomagnetism and Paleomagnetism Studies (49 papers), Earthquake Detection and Analysis (44 papers), GNSS positioning and interference (38 papers), Geophysics and Gravity Measurements (16 papers), Seismic Waves and Analysis (12 papers) and Magnetic confinement fusion research (8 papers). The work is most often cited by research in Astronomy and Astrophysics (4.0k citations), Geophysics (1.5k citations), Aerospace Engineering (1.5k citations), Oceanography (412 citations) and Molecular Biology (1.4k citations). G. J. Sofko has collaborated with scholars based in Canada, United States and United Kingdom. Frequent co-authors include R. A. Greenwald, J. A. Koehler, J. P. Villain, M. Pinnock, W. A. Bristow, Natsuo Sato, A. D. M. Walker, J. M. Ruohoniemi, G. Chisham and T. K. Yeoman. Their work appears in journals such as Journal of Geophysical Research Atmospheres, Annales Geophysicae, Geophysical Research Letters, Radio Science and Advances in Space Research.

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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G. J. Sofko

G. J. Sofko's Hit Papers

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About G. J. Sofko

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