Robert Ryan

2.1k total citations
55 papers, 881 citations indexed

About

Robert Ryan is a scholar working on Aerospace Engineering, Ocean Engineering and Atmospheric Science. According to data from OpenAlex, Robert Ryan has authored 55 papers receiving a total of 881 indexed citations (citations by other indexed papers that have themselves been cited), including 30 papers in Aerospace Engineering, 15 papers in Ocean Engineering and 14 papers in Atmospheric Science. Recurrent topics in Robert Ryan's work include Calibration and Measurement Techniques (23 papers), Infrared Target Detection Methodologies (15 papers) and Satellite Image Processing and Photogrammetry (13 papers). Robert Ryan is often cited by papers focused on Calibration and Measurement Techniques (23 papers), Infrared Target Detection Methodologies (15 papers) and Satellite Image Processing and Photogrammetry (13 papers). Robert Ryan collaborates with scholars based in United States, United Kingdom and Germany. Robert Ryan's co-authors include Mary Pagnutti, Slawomir Blonski, Dennis Helder, Kenton Ross, T. Bergeman, Joseph P. Spruce, H. Metcalf, James C. Smoot, Robert A. Schowengerdt and Taeyoung Choi and has published in prestigious journals such as Journal of Geophysical Research Atmospheres, Remote Sensing of Environment and Physical Review A.

In The Last Decade

Robert Ryan

51 papers receiving 836 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Robert Ryan United States 14 285 242 209 148 126 55 881
Ralf Reulke Germany 15 264 0.9× 324 1.3× 124 0.6× 390 2.6× 153 1.2× 122 1.5k
T. Stuffler Germany 14 170 0.6× 190 0.8× 72 0.3× 101 0.7× 77 0.6× 44 656
S. Dangel Switzerland 11 619 2.2× 186 0.8× 466 2.2× 391 2.6× 321 2.5× 29 1.3k
Peter Coppo Italy 13 136 0.5× 345 1.4× 158 0.8× 367 2.5× 330 2.6× 48 765
Changxiang Yan China 17 118 0.4× 114 0.5× 238 1.1× 98 0.7× 175 1.4× 98 897
Marsha J. Fox United States 10 173 0.6× 170 0.7× 320 1.5× 245 1.7× 301 2.4× 27 764
Jiancheng Li China 20 66 0.2× 486 2.0× 150 0.7× 223 1.5× 151 1.2× 113 1.3k
Hsiao-hua K. Burke United States 11 376 1.3× 159 0.7× 294 1.4× 248 1.7× 270 2.1× 32 1.2k
Jussi Mäkynen Finland 15 491 1.7× 238 1.0× 115 0.6× 481 3.3× 54 0.4× 37 1.1k

Countries citing papers authored by Robert Ryan

Since Specialization
Citations

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

Fields of papers citing papers by Robert Ryan

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Robert Ryan

This figure shows the co-authorship network connecting the top 25 collaborators of Robert Ryan. A scholar is included among the top collaborators of Robert Ryan 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 Robert Ryan. Robert Ryan 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.
Ryan, Robert, et al.. (2024). Satellite Hyperspectral Nighttime Light Observation and Identification with DESIS. Remote Sensing. 16(5). 923–923. 6 indexed citations
2.
Ryan, Robert, et al.. (2023). Impact of a Hyperspectral Satellite Cross-Calibration Radiometer’s Spatial and Noise Characteristics on Cross-Calibration. Remote Sensing. 15(18). 4419–4419. 6 indexed citations
3.
Carmona, E., Kevin Alonso, Martin Bachmann, et al.. (2021). Vicarious Calibration of the DESIS Imaging Spectrometer. elib (German Aerospace Center). 1611–1614. 2 indexed citations
4.
Ryan, Robert, Mary Pagnutti, Larry Leigh, et al.. (2019). The Terra Vega Active Light Source: A First Step in a New Approach to Perform Nighttime Absolute Radiometric Calibrations and Early Results Calibrating the VIIRS DNB. Remote Sensing. 11(6). 710–710. 16 indexed citations
5.
Wang, Zhuosen, Miguel O. Román, Qingsong Sun, et al.. (2018). Nasa's Black Marble Product Suite: Validation Strategy. NASA STI Repository (National Aeronautics and Space Administration). 8197–8200. 1 indexed citations
6.
Ryan, Robert, Susana E. Deustua, M. Sosey, et al.. (2016). The Updated Calibration Pipeline for WFC3/UVIS: a Reference Guide to calwf3 (version 3.3). 1. 3 indexed citations
7.
Brown, Richard A., et al.. (2015). Low Cost Unmanned Aerial Vehicle Monitoring Using Smart Phone Technology. 1. 286–291. 7 indexed citations
8.
Pagnutti, Mary, Slawomir Blonski, Michael Cramer, et al.. (2010). Targets, methods, and sites for assessing the in-flight spatial resolution of electro-optical data products. Canadian Journal of Remote Sensing. 36(5). 583–601. 33 indexed citations
9.
Spruce, Joseph P., et al.. (2007). Potential of VIIRS Time Series Data for Aiding the USDA Forest Service Early Warning System for Forest Health Threats: A Gypsy Moth Defoliation Case Study. NASA STI Repository (National Aeronautics and Space Administration).
10.
Ross, Kenton, et al.. (2006). Simulating Visible/Infrared Imager Radiometer Suite Normalized Difference Vegetation Index Data Using Hyperion and MODIS. NASA STI Repository (National Aeronautics and Space Administration). 2006. 1 indexed citations
11.
Ryan, Robert, et al.. (2006). Remote Sensing Time Series Product Tool. AGUFM. 2006. 5 indexed citations
12.
Ryan, Robert, et al.. (2005). High Spatial Resolution Commercial Satellite Imaging Product Characterization. NASA Technical Reports Server (NASA). 1 indexed citations
13.
Pagnutti, Mary, et al.. (2003). The Joint Agency Commercial Imagery Evaluation Team and Product Characterization Approach. NASA Technical Reports Server (NASA). 2 indexed citations
14.
Ryan, Robert, et al.. (2003). Parameters Describing Earth Observing Remote Sensing Systems. NASA Technical Reports Server (NASA). 1 indexed citations
15.
Stanley, T. D., et al.. (2003). The Joint Agency Commercial Imagery Evaluation team: overview and IKONOS joint characterization approach. Remote Sensing of Environment. 88(1-2). 17–22. 8 indexed citations
16.
Davis, Bruce A., et al.. (2002). Remote Sensing System Requirements Development: A Simulation-Based Approach. NASA Technical Reports Server (NASA). 5 indexed citations
17.
Ryan, Robert. (1999). Headache diagnosis. Clinical cornerstone. 1(6). 11–20. 2 indexed citations
18.
Ryan, Robert, et al.. (1997). <title>Multiview: a novel multispectral IR imaging camera</title>. Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE. 3063. 239–256. 1 indexed citations
19.
Ryan, Robert, et al.. (1993). Two-photon spectroscopy in rubidium with a diode laser. Journal of the Optical Society of America B. 10(9). 1643–1643. 29 indexed citations
20.
Smith, Stuart, et al.. (1990). Hanle effect in spectrally broadened light. Physical Review A. 41(5). 2580–2593. 22 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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