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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Earth Science 45 4416 4063 1705 1516 327 8266

Jan Josef Sojka publications per year

The chart shows the history of publications by Jan Josef Sojka between 1976 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Jan Josef Sojka published across 50 years, from 1976 to 2025, averaging 7.6 papers a year. Output peaked at 18 publications in 2014. 2 of the 382 publications appeared in the last two years.

No. of publications
5 10 15
Bar chart. Horizontal axis: year, 1976 to 2025. Vertical axis: number of publications, 0 to 18. Peak 18 publications in 2014. 1976: 1 publication 1977: 1 publication 1978: 1 publication 1979: 3 publications 1980: 4 publications 1981: 10 publications 1982: 9 publications 1983: 9 publications 1984: 4 publications 1985: 6 publications 1986: 6 publications 1987: 7 publications 1988: 5 publications 1989: 8 publications 1990: 4 publications 1991: 4 publications 1992: 7 publications 1993: 6 publications 1994: 11 publications 1995: 7 publications 1996: 5 publications 1997: 9 publications 1998: 12 publications 1999: 7 publications 2000: 4 publications 2001: 11 publications 2002: 12 publications 2003: 14 publications 2004: 13 publications 2005: 17 publications 2006: 16 publications 2007: 5 publications 2008: 11 publications 2009: 17 publications 2010: 9 publications 2011: 16 publications 2012: 16 publications 2013: 10 publications 2014: 18 publications 2015: 4 publications 2016: 10 publications 2017: 10 publications 2018: 4 publications 2019: 11 publications 2020: 1 publication 2021: 2 publications 2022: 0 publications 2023: 3 publications 2024: 0 publications 2025: 2 publications
1976 2025

382 publications in total across all disciplines

View publications per year as a table
Jan Josef Sojka: publications per year, 1976 to 2025
Year Publications
1976 1
1977 1
1978 1
1979 3
1980 4
1981 10
1982 9
1983 9
1984 4
1985 6
1986 6
1987 7
1988 5
1989 8
1990 4
1991 4
1992 7
1993 6
1994 11
1995 7
1996 5
1997 9
1998 12
1999 7
2000 4
2001 11
2002 12
2003 14
2004 13
2005 17
2006 16
2007 5
2008 11
2009 17
2010 9
2011 16
2012 16
2013 10
2014 18
2015 4
2016 10
2017 10
2018 4
2019 11
2020 1
2021 2
2022 0
2023 3
2024 0
2025 2
Total 382
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Jan Josef Sojka publication distribution in Earth Science in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Earth Science in 2026. The highlighted bar marks where Jan Josef Sojka sits on this spectrum.

No. of scientists
100 200 300 400 500
Bar chart with 58 bars. Horizontal axis: publications, 38–47 to 603+. Vertical axis: number of scientists, 0 to 557. Most scientists, 557, have 128–137 publications. The last bar groups every scientist with 603 publications or more. The highlighted bar, 318–327 publications, is where this scientist sits. 38–47 publications: 5 scientists 48–57 publications: 33 scientists 58–67 publications: 94 scientists 68–77 publications: 161 scientists 78–87 publications: 278 scientists 88–97 publications: 376 scientists 98–107 publications: 404 scientists 108–117 publications: 484 scientists 118–127 publications: 540 scientists 128–137 publications: 557 scientists 138–147 publications: 491 scientists 148–157 publications: 495 scientists 158–167 publications: 458 scientists 168–177 publications: 490 scientists 178–187 publications: 414 scientists 188–197 publications: 401 scientists 198–207 publications: 333 scientists 208–217 publications: 292 scientists 218–227 publications: 290 scientists 228–237 publications: 262 scientists 238–247 publications: 243 scientists 248–257 publications: 208 scientists 258–267 publications: 185 scientists 268–277 publications: 147 scientists 278–287 publications: 128 scientists 288–297 publications: 119 scientists 298–307 publications: 120 scientists 308–317 publications: 107 scientists 318–327 publications: 93 scientists 328–337 publications: 87 scientists 338–347 publications: 64 scientists 348–357 publications: 87 scientists 358–367 publications: 60 scientists 368–377 publications: 60 scientists 378–387 publications: 34 scientists 388–397 publications: 50 scientists 398–407 publications: 44 scientists 408–417 publications: 31 scientists 418–427 publications: 39 scientists 428–437 publications: 27 scientists 438–447 publications: 36 scientists 448–457 publications: 27 scientists 458–467 publications: 29 scientists 468–477 publications: 30 scientists 478–487 publications: 19 scientists 488–497 publications: 15 scientists 498–507 publications: 18 scientists 508–517 publications: 19 scientists 518–527 publications: 16 scientists 528–537 publications: 10 scientists 538–547 publications: 11 scientists 548–557 publications: 14 scientists 558–567 publications: 11 scientists 568–577 publications: 7 scientists 578–587 publications: 14 scientists 588–597 publications: 5 scientists 598–602 publications: 4 scientists 603+ publications: 100 scientists
38–47 publications 603+

This scientist: 327 publications — 89th percentile

89% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 603 publications or more.

View publications distribution as a table
Number of Earth Science scientists by publication count, Research.com 2026 ranking edition. Based on 9,176 ranked scientists.
Publications Scientists This scientist
38–47 5
48–57 33
58–67 94
68–77 161
78–87 278
88–97 376
98–107 404
108–117 484
118–127 540
128–137 557
138–147 491
148–157 495
158–167 458
168–177 490
178–187 414
188–197 401
198–207 333
208–217 292
218–227 290
228–237 262
238–247 243
248–257 208
258–267 185
268–277 147
278–287 128
288–297 119
298–307 120
308–317 107
318–327 93 327
328–337 87
338–347 64
348–357 87
358–367 60
368–377 60
378–387 34
388–397 50
398–407 44
408–417 31
418–427 39
428–437 27
438–447 36
448–457 27
458–467 29
468–477 30
478–487 19
488–497 15
498–507 18
508–517 19
518–527 16
528–537 10
538–547 11
548–557 14
558–567 11
568–577 7
578–587 14
588–597 5
598–602 4
603+ 100
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Jan Josef Sojka D-index placement in Earth Science in 2026

The chart shows the D-index (discipline H-index) distribution of Earth Science scientists ranked by Research.com in 2026. The highlighted bar marks where Jan Josef Sojka sits on this spectrum.

No. of scientists
100 200 300
Bar chart with 77 bars. Horizontal axis: D-Index, 30 to 106+. Vertical axis: number of scientists, 0 to 389. Most scientists, 389, have 36 D-Index. The last bar groups every scientist with 106 D-Index or more. The highlighted bar, 45 D-Index, is where this scientist sits. 30 D-Index: 144 scientists 31 D-Index: 215 scientists 32 D-Index: 278 scientists 33 D-Index: 379 scientists 34 D-Index: 366 scientists 35 D-Index: 372 scientists 36 D-Index: 389 scientists 37 D-Index: 366 scientists 38 D-Index: 344 scientists 39 D-Index: 349 scientists 40 D-Index: 296 scientists 41 D-Index: 289 scientists 42 D-Index: 277 scientists 43 D-Index: 279 scientists 44 D-Index: 248 scientists 45 D-Index: 257 scientists 46 D-Index: 212 scientists 47 D-Index: 202 scientists 48 D-Index: 207 scientists 49 D-Index: 204 scientists 50 D-Index: 183 scientists 51 D-Index: 178 scientists 52 D-Index: 182 scientists 53 D-Index: 178 scientists 54 D-Index: 163 scientists 55 D-Index: 117 scientists 56 D-Index: 163 scientists 57 D-Index: 120 scientists 58 D-Index: 113 scientists 59 D-Index: 136 scientists 60 D-Index: 135 scientists 61 D-Index: 96 scientists 62 D-Index: 103 scientists 63 D-Index: 83 scientists 64 D-Index: 103 scientists 65 D-Index: 83 scientists 66 D-Index: 89 scientists 67 D-Index: 92 scientists 68 D-Index: 89 scientists 69 D-Index: 78 scientists 70 D-Index: 75 scientists 71 D-Index: 53 scientists 72 D-Index: 62 scientists 73 D-Index: 54 scientists 74 D-Index: 35 scientists 75 D-Index: 52 scientists 76 D-Index: 50 scientists 77 D-Index: 32 scientists 78 D-Index: 37 scientists 79 D-Index: 20 scientists 80 D-Index: 33 scientists 81 D-Index: 36 scientists 82 D-Index: 34 scientists 83 D-Index: 34 scientists 84 D-Index: 24 scientists 85 D-Index: 19 scientists 86 D-Index: 18 scientists 87 D-Index: 26 scientists 88 D-Index: 30 scientists 89 D-Index: 17 scientists 90 D-Index: 21 scientists 91 D-Index: 19 scientists 92 D-Index: 15 scientists 93 D-Index: 14 scientists 94 D-Index: 20 scientists 95 D-Index: 9 scientists 96 D-Index: 10 scientists 97 D-Index: 15 scientists 98 D-Index: 13 scientists 99 D-Index: 3 scientists 100 D-Index: 13 scientists 101 D-Index: 3 scientists 102 D-Index: 9 scientists 103 D-Index: 4 scientists 104 D-Index: 6 scientists 105 D-Index: 6 scientists 106+ D-Index: 98 scientists
30 D-Index 106+

This scientist: 45 D-Index — 53rd percentile

53% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 106 D-Index or more.

View D-Index distribution as a table
Number of Earth Science scientists by D-index, Research.com 2026 ranking edition. Based on 9,176 ranked scientists.
D-Index Scientists This scientist
30 144
31 215
32 278
33 379
34 366
35 372
36 389
37 366
38 344
39 349
40 296
41 289
42 277
43 279
44 248
45 257 45
46 212
47 202
48 207
49 204
50 183
51 178
52 182
53 178
54 163
55 117
56 163
57 120
58 113
59 136
60 135
61 96
62 103
63 83
64 103
65 83
66 89
67 92
68 89
69 78
70 75
71 53
72 62
73 54
74 35
75 52
76 50
77 32
78 37
79 20
80 33
81 36
82 34
83 34
84 24
85 19
86 18
87 26
88 30
89 17
90 21
91 19
92 15
93 14
94 20
95 9
96 10
97 15
98 13
99 3
100 13
101 3
102 9
103 4
104 6
105 6
106+ 98
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Overview

Jan Josef Sojka is affiliated with Utah State University in the United States. Their research encompasses multiple fields including Physics and Astronomy, Earth and Planetary Sciences, and Computer Science, with a particular focus on subfields such as Astronomy and Astrophysics, Geophysics, Aerospace Engineering, Computer Vision and Pattern Recognition, and Signal Processing.

The main topics covered in their work include ionosphere and magnetosphere dynamics, earthquake detection and analysis, GNSS positioning and interference, advanced data compression techniques, video coding and compression technologies, image and signal denoising methods, and geomagnetism and paleomagnetism studies.

Sojka has contributed to the following papers:

  • On the detection of a solar radio burst event that occurred on 28 August 2022 and its effect on GNSS signals as observed by ionospheric scintillation monitors distributed over the American sector, 2023, Journal of Space Weather and Space Climate
  • High Quality Image Compression for Rockets and Satellites, 2025, Utah State Research and Scholarship (Utah State University)
  • Is TEC a viable ionospheric servo input?, 2021, Journal of Atmospheric and Solar-Terrestrial Physics
  • Data sets for "On the detection of a solar radio burst event that occurred on 28 August 2022 and its effect on GNSS signals as observed by ionospheric scintillation monitors distributed over the American sector" by Wright et al., 2023, Zenodo (CERN European Organization for Nuclear Research)
  • Data sets for "On the detection of a solar radio burst event that occurred on 28 August 2022 and its effect on GNSS signals as observed by ionospheric scintillation monitors distributed over the American sector" by Wright et al., 2023, Zenodo (CERN European Organization for Nuclear Research)

Frequent co-authors collaborating with Sojka include:

  • Isaac G. Wright
  • F. S. Rodrigues
  • Josemaria Gomez Socola
  • João Francisco Galera Monico
  • L. Scherliess

The publication venues where Sojka has contributed most frequently are:

  • Zenodo (CERN European Organization for Nuclear Research)
  • Journal of Space Weather and Space Climate
  • Utah State Research and Scholarship (Utah State University)
  • Journal of Atmospheric and Solar-Terrestrial Physics

Best Publications

  • Extreme Ultraviolet Variability Experiment (EVE) on the Solar Dynamics Observatory (SDO): Overview of Science Objectives, Instrument Design, Data Products, and Model Developments

    T. N. Woods;F. G. Eparvier;R. Hock;A. R. Jones

  • Global Assimilation of Ionospheric Measurements (GAIM)

    Robert W. Schunk;Ludger Scherliess;Jan Josef Sojka;Donald C. Thompson

  • Parameterized ionospheric model: A global ionospheric parameterization based on first principles models

    R. E. Daniell Jr.;L. D. Brown;D. N. Anderson;M. W. Fox

  • How Hospitable Are Space Weather Affected Habitable Zones? The Role of Ion Escape

    Vladimir S. Airapetian;Alex Glocer;George V. Khazanov;Robert O Parke Loyd

  • A theoretical study of the high-latitude winter f region at solar minimum for low magnetic activity

    Jan Josef Sojka;W. J. Raitt;Robert W. Schunk

  • Development of a physics-based reduced state Kalman filter for the ionosphere

    Ludger Scherliess;Robert W. Schunk;Jan Josef Sojka;Donald C. Thompson

  • Ionosphere-thermosphere space weather issues

    R. W. Schunk;Jan Josef Sojka

  • Modeling Polar Cap F-Region Patches Using Time Varying Convection

    J. J. Sojka;M. D. Bowline;R. W. Schunk;D. T. Decker

  • Utah State University Global Assimilation of Ionospheric Measurements Gauss-Markov Kalman filter model of the ionosphere: Model description and validation

    L. Scherliess;Robert W. Schunk;Jan Josef Sojka;Donald C. Thompson

  • Theoretical Predictions for Ion Composition in the High-Latitude Winter F-Region for Solar Minimum and Low Magnetic Activity

    J. J. Sojka;W. J. Raitt;R. W. Schunk

  • Global scale, physical models of the F region ionosphere

    Unknown

  • Theoretical study of the electron temperature in the high‐latitude ionosphere for solar maximum and winter conditions

    Robert W. Schunk;Jan Josef Sojka;M. D. Bowline

  • Storm time density enhancements in the middle-latitude dayside ionosphere

    R. A. Heelis;Jan Josef Sojka;M. David;R. W. Schunk

  • Patches in the polar ionosphere: UT and seasonal dependence

    Jan Josef Sojka;M. D. Bowline;Robert W. Schunk

  • Ion Temperature Variations in the Daytime High-Latitude F Region

    Robert W. Schunk;Jan Josef Sojka

  • Polar Cap Arcs: A Review

    L. Zhu;R. W. Schunk;Jan Josef Sojka

  • CEDAR Electrodynamics Thermosphere Ionosphere (ETI) Challenge for systematic assessment of ionosphere/thermosphere models: NmF2, hmF2, and vertical drift using ground-based observations

    J. S. Shim;M. Kuznetsova;L. Rastätter;M. Hesse

  • A theoretical study of the high latitude F region's response to magnetospheric storm inputs

    Jan Josef Sojka;Robert W. Schunk

  • Intercomparison of physical models and observations of the ionosphere

    D. N. Anderson;M. J. Buonsanto;M. Codrescu;D. Decker

  • Global ionosphere‐polar wind system during changing magnetic activity

    Robert W. Schunk;Jan Josef Sojka

  • A three-dimensional time-dependent model of the polar wind

    Robert W. Schunk;Jan Josef Sojka

Frequent Co-Authors

Robert W. Schunk
Robert W. Schunk Utah State University
Anthony J. Mannucci
Anthony J. Mannucci California Institute of Technology
Tim Fuller-Rowell
Tim Fuller-Rowell University of Colorado Boulder
Piotr Kokoszka
Piotr Kokoszka Colorado State University
Thomas N. Woods
Thomas N. Woods University of Colorado Boulder
Attila Komjathy
Attila Komjathy California Institute of Technology
Aaron J. Ridley
Aaron J. Ridley University of Michigan–Ann Arbor
Roderick A. Heelis
Roderick A. Heelis The University of Texas at Dallas
Dieter Bilitza
Dieter Bilitza George Mason University

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