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.
This map shows the geographic impact of David Vallado'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 Vallado with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites David Vallado more than expected).
This network shows the impact of papers produced by David Vallado. 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 Vallado. The network helps show where David Vallado may publish in the future.
Co-authorship network of co-authors of David Vallado
This figure shows the co-authorship network connecting the top 25 collaborators of David Vallado.
A scholar is included among the top collaborators of David Vallado 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 Vallado. David Vallado is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Vallado, David, et al.. (2017). FRAGMENTATION EVENT DEBRIS FIELD EVOLUTION USING 3D VOLUMETRIC RISK ASSESSMENT.3 indexed citations
6.
Vallado, David. (2016). Curvilinear Coordinates for Covariance and Relative Motion Operations.
7.
Aristoff, Jeffrey M., Joshua T. Horwood, Roberto Armellin, et al.. (2016). Covariance and Uncertainty Realism in Space Surveillance and Tracking.28 indexed citations
Alfano, Salvatore, et al.. (2008). Space Debris Birth to Death Analysis from Concern to Consequences. Advanced Maui Optical and Space Surveillance Technologies Conference.2 indexed citations
14.
Vallado, David, et al.. (2008). SGP4 Orbit Determination. AIAA/AAS Astrodynamics Specialist Conference and Exhibit.155 indexed citations
15.
Carrico, J. P., et al.. (2006). Proximity Operations for Space Situational Awareness Spacecraft Rendezvous and Maneuvering using Numerical Simulations and Fuzzy Logic.3 indexed citations
16.
Vallado, David, et al.. (2006). Revisiting Spacetrack Report #3. AIAA/AAS Astrodynamics Specialist Conference and Exhibit.267 indexed citations
17.
Vallado, David, et al.. (2005). Spaceflight mechanics 2005 : proceedings of the AAS/AIAA Space Flight Mechanics Meeting held January 23-27, 2005, Copper Mountain, Colorado.1 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.