Charles E. Keffer

555 total citations
14 papers, 466 citations indexed

About

Charles E. Keffer is a scholar working on Spectroscopy, Electrical and Electronic Engineering and Atmospheric Science. According to data from OpenAlex, Charles E. Keffer has authored 14 papers receiving a total of 466 indexed citations (citations by other indexed papers that have themselves been cited), including 6 papers in Spectroscopy, 6 papers in Electrical and Electronic Engineering and 4 papers in Atmospheric Science. Recurrent topics in Charles E. Keffer's work include Spectroscopy and Laser Applications (6 papers), Atmospheric Ozone and Climate (4 papers) and Atmospheric and Environmental Gas Dynamics (3 papers). Charles E. Keffer is often cited by papers focused on Spectroscopy and Laser Applications (6 papers), Atmospheric Ozone and Climate (4 papers) and Atmospheric and Environmental Gas Dynamics (3 papers). Charles E. Keffer collaborates with scholars based in United States and Australia. Charles E. Keffer's co-authors include James F. Spann, D. G. Torr, Marsha R. Torr, Muamer Zukic, G. K. Parks, B. T. Tsurutani, K. C. Clark, R. Barry Johnson, J. M. Ajello and Peter M. Banks and has published in prestigious journals such as Chemical Physics Letters, Icarus and Review of Scientific Instruments.

In The Last Decade

Charles E. Keffer

13 papers receiving 408 citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Charles E. Keffer United States	7	352	154	140	88	68	14	466
V. J. Abreu United States	15	589 1.7×	93 0.6×	361 2.6×	96 1.1×	44 0.6×	37	710
Shoichi Okano Japan	11	266 0.8×	55 0.4×	95 0.7×	77 0.9×	18 0.3×	34	309
C. P. Pike United States	18	595 1.7×	148 1.0×	192 1.4×	168 1.9×	40 0.6×	45	749
Maurice Pomerantz United States	3	281 0.8×	62 0.4×	103 0.7×	90 1.0×	14 0.2×	12	397
M. W. J. Scourfield South Africa	13	370 1.1×	113 0.7×	87 0.6×	189 2.1×	10 0.1×	45	439
M. W. Pharo United States	11	413 1.2×	69 0.4×	137 1.0×	112 1.3×	25 0.4×	18	467
M. Flasar United States	6	425 1.2×	62 0.4×	188 1.3×	19 0.2×	71 1.0×	17	505
K. P. Magee United States	6	289 0.8×	42 0.3×	110 0.8×	61 0.7×	18 0.3×	15	410
I. McWhirter United Kingdom	11	238 0.7×	65 0.4×	128 0.9×	36 0.4×	15 0.2×	26	374
Motokazu Hirono Japan	14	167 0.5×	78 0.5×	287 2.0×	66 0.8×	52 0.8×	42	528

Countries citing papers authored by Charles E. Keffer

Since Specialization

Citations

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

Fields of papers citing papers by Charles E. Keffer

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Charles E. Keffer

This figure shows the co-authorship network connecting the top 25 collaborators of Charles E. Keffer. A scholar is included among the top collaborators of Charles E. Keffer 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 Charles E. Keffer. Charles E. Keffer is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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14 of 14 papers shown

Walker, William E., et al.. (2007). MRDF and BRDF measurements of low-scatter materials. Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE. 6550. 65500H–65500H. 4 indexed citations

Keffer, Charles E., et al.. (2007). Advanced measurements optical range (AMOR) ladar test facility. Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE. 6550. 65500E–65500E. 2 indexed citations

Walker, William E., et al.. (2007). Coherent backscatter: measurement of the retroreflective BRDF peak exhibited by several surfaces relevant to ladar applications. Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE. 6682. 66820E–66820E. 13 indexed citations

Torr, Marsha R., D. G. Torr, Muamer Zukic, et al.. (1995). A far ultraviolet imager for the International Solar-Terrestrial Physics Mission. Space Science Reviews. 71(1-4). 329–383. 370 indexed citations

Kim, Jongmin, Jeffrey J. Weimer, Muamer Zukic, Charles E. Keffer, & D. G. Torr. (1994). <title>X-ray photoelectron spectroscopy depth profiling of oxidized aluminum thin films</title>. Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE. 2262. 79–85. 1 indexed citations

Keffer, Charles E., et al.. (1994). Radiation damage effects in far-ultraviolet filters, thin films, and substrates. Applied Optics. 33(25). 6041–6041. 5 indexed citations

Keffer, Charles E., Marsha R. Torr, Muamer Zukic, et al.. (1993). <title>Radiation damage effects in far-ultraviolet filters and substrates</title>. Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE. 2018. 92–103. 3 indexed citations

Spann, James F., Charles E. Keffer, & Muamer Zukic. (1993). A vacuum ultraviolet spectrophotometric system. NASA STI Repository (National Aeronautics and Space Administration).

Smith, W. H., et al.. (1991). Pressure broadening of deuterium hydride lines in the 5-0 vibrational band between 77 and 295 K. Icarus. 91(2). 234–237. 1 indexed citations

10.

Keffer, Charles E., et al.. (1986). Pressure broadening of ammonia lines in the 6475åband at room and low temperatures. Journal of Quantitative Spectroscopy and Radiative Transfer. 35(6). 487–493. 13 indexed citations

11.

Keffer, Charles E., et al.. (1986). Pressure broadening of methane lines in the 6190Åand 6825Åbands at room and low temperatures. Journal of Quantitative Spectroscopy and Radiative Transfer. 35(6). 495–499. 25 indexed citations

12.

Keffer, Charles E., et al.. (1985). Gas phase cryogenic photoacoustic detector. Review of Scientific Instruments. 56(11). 2161–2163. 10 indexed citations

13.

Keffer, Charles E., et al.. (1985). Hydrogen broadening of vibrational-rotational transitions of ammonia lying near 6450 Å. Journal of Quantitative Spectroscopy and Radiative Transfer. 33(3). 193–196. 9 indexed citations

14.

Keffer, Charles E., et al.. (1984). Limits on the intramolecular relaxation rate for high vibrational overtones of methane. Chemical Physics Letters. 104(5). 475–477. 10 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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