E. Sagawa

2.4k total citations · 1 hit paper
51 papers, 1.8k citations indexed

About

E. Sagawa is a scholar working on Astronomy and Astrophysics, Molecular Biology and Geophysics. According to data from OpenAlex, E. Sagawa has authored 51 papers receiving a total of 1.8k indexed citations (citations by other indexed papers that have themselves been cited), including 45 papers in Astronomy and Astrophysics, 18 papers in Molecular Biology and 11 papers in Geophysics. Recurrent topics in E. Sagawa's work include Ionosphere and magnetosphere dynamics (43 papers), Solar and Space Plasma Dynamics (29 papers) and Geomagnetism and Paleomagnetism Studies (18 papers). E. Sagawa is often cited by papers focused on Ionosphere and magnetosphere dynamics (43 papers), Solar and Space Plasma Dynamics (29 papers) and Geomagnetism and Paleomagnetism Studies (18 papers). E. Sagawa collaborates with scholars based in Japan, United States and Canada. E. Sagawa's co-authors include S. B. Mende, T. J. Immel, H. U. Frey, A. W. Yau, M. E. Hagan, S. England, Charles Swenson, L. J. Paxton, Sarah B. Henderson and B. A. Whalen and has published in prestigious journals such as Journal of Geophysical Research Atmospheres, Geophysical Research Letters and Advances in Space Research.

In The Last Decade

E. Sagawa

47 papers receiving 1.7k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Control of equatorial ionospheric morphology by atmospheric tides

2006 558 citations T. J. Immel, E. Sagawa et al. Geophysical Research Letters profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
E. Sagawa Japan	19	1.7k	545	470	394	304	51	1.8k
R. G. Burnside United States	19	1.5k 0.8×	309 0.6×	456 1.0×	387 1.0×	406 1.3×	34	1.5k
А. Д. Данилов Russia	24	1.9k 1.1×	554 1.0×	816 1.7×	381 1.0×	646 2.1×	158	2.0k
R. H. Wand United States	28	1.8k 1.0×	565 1.0×	579 1.2×	420 1.1×	324 1.1×	54	1.9k
C. J. Heinselman United States	25	1.8k 1.0×	405 0.7×	631 1.3×	475 1.2×	331 1.1×	83	1.9k
P. J. Sultan United States	16	2.0k 1.1×	473 0.9×	765 1.6×	898 2.3×	175 0.6×	25	2.0k
R. Sridharan India	27	2.3k 1.3×	367 0.7×	778 1.7×	625 1.6×	554 1.8×	125	2.4k
M. Conde United States	23	1.7k 1.0×	461 0.8×	479 1.0×	308 0.8×	629 2.1×	95	1.8k
P. A. Roddy United States	25	1.5k 0.8×	323 0.6×	444 0.9×	700 1.8×	213 0.7×	60	1.5k
L. E. Wharton United States	19	1.4k 0.8×	554 1.0×	217 0.5×	156 0.4×	377 1.2×	30	1.5k
P. R. Straus United States	12	954 0.5×	187 0.3×	360 0.8×	345 0.9×	251 0.8×	33	1.0k

Countries citing papers authored by E. Sagawa

Since Specialization

Citations

This map shows the geographic impact of E. Sagawa'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 E. Sagawa with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites E. Sagawa more than expected).

Fields of papers citing papers by E. Sagawa

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by E. Sagawa. 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 E. Sagawa. The network helps show where E. Sagawa may publish in the future.

Co-authorship network of co-authors of E. Sagawa

This figure shows the co-authorship network connecting the top 25 collaborators of E. Sagawa. A scholar is included among the top collaborators of E. Sagawa based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with E. Sagawa. E. Sagawa is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Ishii, Mamoru, Shin‐ichiro Oyama, Satonori Nozawa, et al.. (2014). Dynamics of Neutral Wind in the polar region observed with two Fabry-Perot Interferometers. Earth Planets and Space. 51(7-8). 833–844. 10 indexed citations

Immel, T. J., E. Sagawa, S. England, et al.. (2006). Control of equatorial ionospheric morphology by atmospheric tides. Geophysical Research Letters. 33(15). 558 indexed citations breakdown →

Ogawa, Tadahiko, E. Sagawa, Yuichi Otsuka, et al.. (2005). Simultaneous ground- and satellite-based airglow observations of geomagnetic conjugate plasma bubbles in the equatorial anomaly. Earth Planets and Space. 57(5). 385–392. 26 indexed citations

Immel, T. J., et al.. (2004). The climatology of low-latitude ionospheric densities and zonal drifts from IMAGE-FUV.. AGUFM. 2004. 1 indexed citations

Immel, T. J., S. B. Mende, H. U. Frey, L. M. Peticolas, & E. Sagawa. (2003). Determination of low latitude plasma drift speeds from FUV images. Geophysical Research Letters. 30(18). 42 indexed citations

Sagawa, E., et al.. (2002). Development of CRL Fabry-Perot interferometers and observation of the thermosphere. 48(2). 155–164. 3 indexed citations

Sagawa, E., Takashi Maruyama, T. J. Immel, H. U. Frey, & S. B. Mende. (2002). Global View of the Nighttime low Latitude Ionosphere by the 135.6 nm OI Observation with IMAGE/FUV. AGUFM. 2002. 4 indexed citations

Oyama, Shin‐ichiro, Satonori Nozawa, S. Buchert, et al.. (2000). Effects of atmospheric oscillations on the field-aligned ion motions in the polar F-region. Annales Geophysicae. 18(9). 1154–1163. 2 indexed citations

Obara, T., Mitsue Den, Tsutomu Nagatsuma, & E. Sagawa. (1998). Enhancement of the trapped radiation electrons at 6.6 Re during the storm recovery phase─Results from GMS/SEM observation─. Institutional Repository National Institute of Polar Research (National Institute of Polar Research (Japan)). 12. 86–93. 2 indexed citations

10.

Ishii, Mamoru, et al.. (1997). Development of Fabry-Perot interferometers for airglow observations. Institutional Repository National Institute of Polar Research (National Institute of Polar Research (Japan)). 10(10). 97–108. 14 indexed citations

11.

Hirahara, Masafumi, T. Mukai, E. Sagawa, N. Kaya, & H. Hayakawa. (1997). Multiple energy‐dispersed ion precipitations in the low‐latitude auroral oval: Evidence of E × B drift effect and upward flowing ion contribution. Journal of Geophysical Research Atmospheres. 102(A2). 2513–2530. 19 indexed citations

12.

Abe, Takumi, et al.. (1995). Akebono observations of thermal ion outflow and electron temperature in the polar wind region. JAXA Repository (JAXA). 4 indexed citations

13.

Yau, A. W., et al.. (1993). EXOS D (Akebono) observations of molecular NO⁺ and N₂⁺ upflowing ions in the high‐altitude auroral ionosphere. Journal of Geophysical Research Atmospheres. 98(A7). 11205–11224. 43 indexed citations

14.

Abe, Takumi, B. A. Whalen, A. W. Yau, et al.. (1993). Altitude profile of the polar wind velocity and its relationship to ionospheric conditions. Geophysical Research Letters. 20(24). 2825–2828. 53 indexed citations

15.

Sagawa, E., et al.. (1991). Low energy upflowing ion events observed by EXOS‐D: Initial results. Geophysical Research Letters. 18(2). 337–340. 4 indexed citations

16.

Whalen, B. A., J. R. Burrows, A. W. Yau, et al.. (1990). The suprathermal ion mass spectrometer(SMS) onboard the Agebono (EXOS-D) satellite. Journal of geomagnetism and geoelectricity. 42(4). 511–536. 38 indexed citations

17.

Mukai, Toshifumi, Nobuyuki Kaya, E. Sagawa, et al.. (1990). Low energy charged particle observations in the "auroral" magnetosphere: First results from the Akebono (EXOS-D) satellite.. Journal of geomagnetism and geoelectricity. 42(4). 479–496. 66 indexed citations

18.

Sagawa, E., Hisao Yamagishi, Hiroshi Miyaoka, Nobuyuki Kaya, & Toshifumi Mukai. (1988). Rocket observations of modulations of the auroral electron flux in a wide range of frequency.. Journal of geomagnetism and geoelectricity. 40(7). 887–904. 2 indexed citations

19.

Sagawa, E., et al.. (1985). Correlation analysis of electric field and electron density fluctuations observed by a sounding rocket S-310JA-7. Memoirs of National Institute of Polar Research. Special issue. 36(36). 238–244. 1 indexed citations

20.

Sagawa, E., S. Miyazaki, & Hajime Mori. (1981). Night-time electron temperature troughs in the equatorial topside ionosphere revealed from RPA experiments on the ISS-b satellite. Journal of Atmospheric and Terrestrial Physics. 43(11). 1165–1173. 4 indexed citations

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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