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Applying Required Navigation Performance Concept for Traffic Management of Small Unmanned Aircraft SystemsIn anticipation of a rapid increase in the number of civil Unmanned Aircraft System(UAS) operations, NASA is researching prototype technologies for a UAS Traffic Management (UTM) system that will investigate airspace integration requirements for enabling safe, efficient low-altitude operations. One aspect a UTM system must consider is the correlation between UAS operations (such as vehicles, operation areas and durations), UAS performance requirements, and the risk to people and property in the operational area. This paper investigates the potential application of the International Civil Aviation Organizations (ICAO) Required Navigation Performance (RNP) concept to relate operational risk with trajectory conformance requirements. The approach is to first define a method to quantify operational risk and then define the RNP level requirement as a function of the operational risk. Greater operational risk corresponds to more accurate RNP level, or smaller tolerable Total System Error (TSE). Data from 19 small UAS flights are used to develop and validate a formula that defines this relationship. An approach to assessing UAS-RNP conformance capability using vehicle modeling and wind field simulation is developed to investigate how this formula may be applied in a future UTM system. The results indicate the modeled vehicles flight path is robust to the simulated wind variation, and it can meet RNP level requirements calculated by the formula. The results also indicate how vehicle-modeling fidelity may be improved to adequately verify assessed RNP level.
Document ID
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Jung, Jaewoo
(NASA Ames Research Center Moffett Field, CA United States)
D'Souza, Sarah N.
(NASA Ames Research Center Moffett Field, CA United States)
Johnson, Marcus A.
(NASA Ames Research Center Moffett Field, CA, United States)
Ishihara, Abraham K.
(SGT, Inc. Moffett Field, CA, United States)
Modi, Hemil C.
(SGT, Inc. Moffett Field, CA, United States)
Nikaido, Ben
(Science and Technology Corp. Moffett Field, CA, United States)
Hasseeb, Hashmatullah
(Science and Technology Corp. Moffett Field, CA, United States)
Date Acquired
September 27, 2016
Publication Date
September 25, 2016
Subject Category
Cybernetics, Artificial Intelligence And Robotics
Computer Programming And Software
Aircraft Communications And Navigation
Report/Patent Number
Meeting Information
Meeting: ICAS 2016 Congress of the International Council of the Aeronautics Sciences
Location: Daejeon
Country: Korea, Republic of
Start Date: September 25, 2016
End Date: September 30, 2016
Sponsors: Korean Society for Aeronautical and Space Sciences
Funding Number(s)
WBS: WBS 154692.
Distribution Limits
Public Use Permitted.
required navigation performance
air traffic management
unmanned aerial system
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