This map shows the geographic impact of Fred Espenak'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 Fred Espenak with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Fred Espenak more than expected).
This network shows the impact of papers produced by Fred Espenak. 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 Fred Espenak. The network helps show where Fred Espenak may publish in the future.
Co-authorship network of co-authors of Fred Espenak
This figure shows the co-authorship network connecting the top 25 collaborators of Fred Espenak.
A scholar is included among the top collaborators of Fred Espenak 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 Fred Espenak. Fred Espenak is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
All Works
20 of 20 papers shown
1.
Espenak, Fred, et al.. (2009). Totality : eclipses of the sun : updated with guides to total eclipses from 2009 through 2017. Oxford University Press eBooks.1 indexed citations
2.
Livengood, T. A., T. Kostiuk, W. C. Maguire, et al.. (2001). Measurements of Non-Thermal Infrared Emission Lines of Carbon Dioxide in the Mars Upper Atmosphere. 33.1 indexed citations
3.
Hewagama, T., J. Goldstein, Fred Espenak, et al.. (1998). Spectral Line Analysis for Planetary Atmospheric Dynamics Retrieval. Bulletin of the American Astronomical Society. 30. 1093.8 indexed citations
4.
Kostiuk, Theodor, K. E. Fast, T. A. Livengood, et al.. (1997). Which Way Does the Wind Blow? Titan's Zonal Circulation. DPS.1 indexed citations
5.
Espenak, Fred & Jay Anderson. (1996). Total Solar Eclipse of 1998 February 26. CTIT technical reports series.2 indexed citations
6.
Espenak, Fred. (1996). Coming Attractions: A Solar-Eclipse Sneak Preview. Sky and Telescope. 92(2). 48.2 indexed citations
7.
Fast, K. E., T. A. Livengood, T. Kostiuk, et al.. (1995). NH 3 in Jupiter's Stratosphere Within the Year Following the SL9 Impacts. DPS. 27.2 indexed citations
8.
Espenak, Fred & Jay Anderson. (1995). Total solar eclipse of 1997 March 9. IEEE Transactions on Software Engineering.18 indexed citations
9.
Espenak, Fred, D. Bühl, P. N. Romani, et al.. (1995). Altitude Distribution of Ammonia Deposited in Jupiter's Stratosphere by the SL9 Impacts. DPS. 27.2 indexed citations
10.
Fast, K. E., T. Kostiuk, Fred Espenak, et al.. (1994). Direct Measurement Of Doppler Shifts Due To Zonal Winds On Titan. DPS. 26.2 indexed citations
11.
Kostiuk, T., K. E. Fast, D. Zipoy, et al.. (1994). Very High-Resolution Spectroscopy of the Jovian Stratosphere in the Wake of the SL9 Impacts. 26. 1584.1 indexed citations
12.
Espenak, Fred. (1994). Twelve-year planetary ephemeris: 1995-2006. NASA Technical Reports Server (NASA).2 indexed citations
13.
Kostiuk, T., Fred Espenak, P. N. Romani, & J. Goldstein. (1990). The Spectral Content of the 7.8 μm Emission from Jupiter at High Resolution. Bulletin of the American Astronomical Society. 22. 1066.1 indexed citations
14.
Deming, Drake, M. J. Mumma, Fred Espenak, et al.. (1988). Zonal Thermal Structure of Jupiter. Bulletin of the American Astronomical Society. 20. 872.2 indexed citations
15.
Espenak, Fred & M. J. Mumma. (1987). A Search for Ozone in the Atmosphere of Mars. Bulletin of the American Astronomical Society. 19. 818.2 indexed citations
16.
Deming, Drake, et al.. (1987). A Search for p-mode Oscillations of Jupiter. Bulletin of the American Astronomical Society. 19. 828.2 indexed citations
17.
Espenak, Fred, et al.. (1985). Study of Velocity Structure in IRC +10216 Using Acetylene Line Profiles. Bulletin of the American Astronomical Society. 17. 570.1 indexed citations
18.
Espenak, Fred, et al.. (1985). Spatial Distribution of Ethane on Jupiter.. Bulletin of the American Astronomical Society. 17. 708.2 indexed citations
19.
Kostiuk, T., M. J. Mumma, Fred Espenak, et al.. (1982). Measurements of Ethane Abundance in the Jovian Stratosphere.. Bulletin of the American Astronomical Society. 14. 723.1 indexed citations
20.
Kostiuk, T., Fred Espenak, D. Bühl, et al.. (1980). Quantitative Analysis of CO 2 Lines Formed in the Lower Atmosphere of Mars: Comparison with Viking and Mariner Ground-Truth Results.. Bulletin of the American Astronomical Society. 12. 703.2 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.