This map shows the geographic impact of David Kappel'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 David Kappel with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites David Kappel more than expected).
This network shows the impact of papers produced by David Kappel. 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 David Kappel. The network helps show where David Kappel may publish in the future.
Co-authorship network of co-authors of David Kappel
This figure shows the co-authorship network connecting the top 25 collaborators of David Kappel.
A scholar is included among the top collaborators of David Kappel 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 David Kappel. David Kappel is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Marschall, Raphael, Yuri Skorov, Vladimir Zakharov, et al.. (2020). Cometary Comae-Surface Links. Space Science Reviews. 216(8). 130–130.13 indexed citations
7.
Helbert, J., Darby Dyar, Ingo Walter, et al.. (2019). The Venus Emissivity Mapper - Obtaining Global Mineralogy of Venus from Orbit on the ESA EnVision and NASA VERITAS Missions to Venus. elib (German Aerospace Center). 2046.
8.
Kappel, David, Katharina A. Otto, N. Oklay, et al.. (2018). Studying surface morphologies of comet 67P/C-G using discrete element simulations. elib (German Aerospace Center).
Rinaldi, G., D. Bockelée–Morvan, C. Leyrat, et al.. (2016). The outburst sequence of 67/P on 2015 September 13 as seen by VIRTIS/Rosetta. elib (German Aerospace Center). 48.1 indexed citations
11.
Helbert, J., Emmanuel Marcq, Thomas Widemann, et al.. (2016). The Venus Emissivity Mapper. elib (German Aerospace Center).1 indexed citations
12.
Moroz, L. V., Kathrin Markus, G. Arnold, et al.. (2016). Reflectance spectroscopy of natural organic solids, iron sulfides and their mixtures as refractory analogues for Rosetta/VIRTIS' surface composition analysis of 67P/CG. elib (German Aerospace Center).1 indexed citations
13.
Helbert, J., Ingo Walter, Thomas Widemann, et al.. (2016). The Venus Emissivity Mapper (VEM) concept. Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE. 9973. 99730R–99730R.12 indexed citations
14.
Arnold, Gabriele, et al.. (2015). Retrieval and study of near-infrared surface emissivity maps of Themis Regio on Venus with VIRTIS-M (Venus Express). elib (German Aerospace Center).1 indexed citations
15.
Haus, Rainer, David Kappel, & G. Arnold. (2014). Atmospheric thermal structure and cloud features of Venus as retrieved from VIRTIS/VEX measurements. elib (German Aerospace Center). 9.1 indexed citations
16.
Haus, Rainer, David Kappel, & G. Arnold. (2013). Investigation of Venus' atmospheric thermal structure and cloud features over the northern nightside hemisphere applying self-consistent retrieval procedures. elib (German Aerospace Center).1 indexed citations
17.
Kappel, David, Gabriele Arnold, & Rainer Haus. (2012). Sensitivity of Venus surface emissivity retrieval to model variations of CO2 opacity, cloud features, and deep atmosphere temperature field. elib (German Aerospace Center). 39. 876.2 indexed citations
18.
Kappel, David, Gabriele Arnold, & Rainer Haus. (2012). Retrieval of Surface Emissivity in a Venus Coordinate Patch as Parameter Common to Repeated Measurements by VIRTIS/VEX. elib (German Aerospace Center). 9708.2 indexed citations
Kappel, David, G. Arnold, Rainer Haus, G. Piccioni, & P. Drossart. (2010). Results from Multispectrum Retrieval of VIRTIS-M-IR Measurements of Venus' Nightside. elib (German Aerospace Center). 390.3 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.