Nelson Guerreriro


Nelson Guerreiro is a research aerospace engineer in the Crew Systems and Aviation Operations Branch at NASA Langley Research Center.  He has worked at NASA Langley since 2009 in the areas of passenger demand projection modeling, NAS-wide simulation modeling and analysis, separation assurance function allocation, and, most recently, trajectory-based operations research.  His areas of expertise include simulation development, data processing and analysis, algorithm develop, and flight dynamics and control.  Nelson earned both Bachelor’s and Master’s degrees in Aerospace Engineering from the University of Maryland.



1. Guerreiro, N.M., Hagen, G.E., Maddalon, J.M., Butler, R.W., “Capacity and Throughput of Urban Air Mobility Vertiports with a First-Come, First-Served Vertiport Scheduling Algorithm,” AIAA AVIATION Forum, Aviation Technology, Integration, and Operations (ATIO) Conference, AIAA 2020-2903, Online Virtual Conference, 2020.

2. Guerreiro, N.M., Butler, R.W., Hagen, G.E., Maddalon, J.M., “Mission Planner Algorithm for Urban Air Mobility – initial Performance Characterization,” AIAA AVIATION Forum, Aviation Technology, Integration, and Operations (ATIO) Conference, AIAA 2019-3626, Dallas, Texas, 2019.

3. Guerreiro, N.M., Underwood, M.C., “Understanding Extended Projected Profile (EPP) Trajectory Error Using a Medium-Fidelity Aircraft Simulation,” AIAA AVIATION Forum, Aviation Technology, Integration, and Operations (ATIO) Conference, AIAA 2018-3044, Atlanta, Georgia, 2018.

4. Guerreiro, N.M., Underwood, M.C., “Preliminary Error Characterization and Parametric Error Model for the Automatic Dependent Surveillance – Contract Extended Projected Profile Message,” NASA/TM-2018-219810, March 2018.

5. Guerreiro, N.M., et al., “An Advanced Trajectory-Based Operations Prototype Tool and Focus Group Evaluation,” NASA/TM-2017-219670, September 2017.

6. Guerreiro, N.M., et al., “Prototype Tool and Focus Group Evaluation for an Advanced Trajectory-Based Operations Concept,” AIAA Aviation Technology, Integration, and Operations (ATIO) Conference, AIAA 2017-4096, Denver, Colorado, 2017.

7. Guerreiro, N.M., et al., “Parametric Analysis of Surveillance Quality and Level and Quality of Intent Information and Their Impact on Conflict Detection Performance,” NASA/TM-2016-219177, March 2016.

8. Guerreiro, N.M., Maddalon, J.M., Lewis, T.A., Hagen, G.E., “Conflict Detection Performance Analysis for Function Allocation Using Time-Shifted Recorded Traffic Data,” AIAA Aviation Technology, Integration, and Operations (ATIO) Conference, AIAA 2015-2275, Dallas, Texas, 2015.

9. Guerreiro, N.M., Neitzke, K.W., “Simulated Wake Characteristics Data for Closely Spaced Parallel Runway Operations Analysis,” 12th AIAA Aviation Technology, Integration, and Operations (ATIO) Conference and 14th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, AIAA 2012-5642, Indianapolis, Indiana, 2012.

10. Guerreiro, N., et al., “Characterizing a Wake-Free Safe Zone for the Simplified Aircraft-Based Paired Approach Concept,” 12th AIAA Atmospheric and Space Environments Conference, AIAA 2010-7681, Toronto, Ontario, Canada, 2010.

11. Guerreiro, N., Hubbard, J., “Flight Testing of a Model Aircraft with Trailing-Edge Flaps Optimized for Lift Distribution Control,” AIAA Atmospheric Flight Mechanics Conference and Exhibit, AIAA 2008-6709, Honolulu, Hawaii, 2008.

12. Guerreiro, N., Hubbard, J., “Pressure Port Placement for Lift Distribution Measurement on a Model Aircraft with Optimized Trailing-Edge Flaps,” 26th AIAA Applied Aerodynamics Conference, AIAA 2008-7518, Honolulu, Hawaii, 2008.

13. Guerreiro, N., Hubbard, J., “Trailing-Edge Flap Optimization for Lift Distribution Control,” 46th AIAA Aerospace Sciences Meeting and Exhibit, AIAA 2008-328, Reno, Nevada, 2008.

14. Guerreiro, N., Hubbard Jr, J., Motter, M. “Non-Linear Controls Influence Functions in an Aircraft Dynamics Simulator,” SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring Conference, San Diego, California, 2006.


1. Hagen, G.E., Guerreiro, N.M., Maddalon, J.M., Butler, R.W., “An Efficient Universal Trajectory Language,” NASA/TM-2017-219669, September 2017.

2. Lewis, T.A., Aweiss, A.S., Guerreiro, N.M., Daiker, R.J., “A Review of Function Allocation and En Route Separation Assurance,” NASA/TM-2016-219343, November 2016.

3. Horio B.M., et al., “An Integrated Framework for Modeling Air Carrier Behavior, Policy, and Impacts in the U.S. Air Transportation System,” AIAA Modeling and Simulation Technologies Conference, AIAA 2015-2800, Dallas, Texas, 2015.

4. Kumar, V.K., et al., “Understanding Air Transportation Market Dynamics using a Search Algorithm for Calibrating Travel Demand and Price,” AIAA Modeling and Simulation Technologies Conference, AIAA 2015-2493, Dallas, Texas, 2015.

5. Neitzke, K.W., Guerreiro, N.M., “Exploration of the Theoretical Physical Capacity of the John F. Kennedy International Airport Runway System,” AIAA Modeling and Simulation Technologies Conference, AIAA 2014-0806, National Harbor, Maryland, 2014.

6. Johnson, S.C., et al., “Simplified Aircraft-Based Paired Approach: Concept Definition and Initial Analysis,” NASA/TP-2013-217994, May 2013.

7. Wissa, A., et al., “Flight Testing of Novel Compliant Spines for Passive Wing Morphing on Ornithopters,” AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, AIAA 2013-1516, Boston, Massachusetts, 2013.

8. Smith, J.C., et al., “Projected Demand and Potential Impacts to the National Airspace System of Autonomous, Electric, On-Demand Small Aircraft,” AIAA Aviation Technology, Integration, and Op.