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Initial Approach to Collect Small Unmanned Aircraft System Off-Nominal Operational Situations DataNASA is developing the Unmanned Aircraft System Traffic Management research platform to safely integrate small unmanned aircraft operations in large-scale at low-altitudes. As a part of this effort, small unmanned aircraft system off-nominal operational situations data collection process has been developed to take lessons learned and to reinforce operational compliance. In this paper, descriptions of variables used for digital data collection and an online report form for collection of observational data from the operators (contextual data) are provided. They are used to collect off-nominal data from the Unmanned Aircraft System Traffic Management National Campaign in 2017. The digital data show that 2 out of 118 campaign operations (1.7%) encountered loss of navigation. Since the campaign aircraft used Global Positioning System for navigation, it is likely that unobstructed view of the sky at the campaign locations contributed to this small number. Also, 4 out of 47 operations (8.5%) encountered loss of communications. A relatively short distance between ground control system and aircraft, ranging from 2300 feet to 4200 feet, likely contributed to this small number. There was no data to identify the loss of communications condition, aircraft received signal strength, for the remaining 71 operations suggesting that some operators may not be monitoring unmanned aircraft communications system performance or monitoring it with different parameters. For the contextual data, due to the low number of total reports during the campaign, no significant trends emerged. This is an initial attempt to collect contextual data from small unmanned aircraft operators about off-nominal situations, and changes will be made to the future data collection to improve the amount and quality of the information.
Document ID
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Jung, Jaewoo
(NASA Ames Research Center Moffett Field, CA, United States)
Drew, Charles R.
(Wyle Labs., Inc. Moffett Field, CA, United States)
Nag, Sreeja
(Bay Area Environmental Research Inst. Moffett Field, CA, United States)
Torres Matos, Edgar O.
(Science Applications International Corp. Moffett Field, CA, United States)
Ishihara, Abraham K.
(Stinger Ghaffarian Technologies, Inc. Moffett Field, CA, United States)
Do, Minh
(Stinger Ghaffarian Technologies, Inc. Moffett Field, CA, United States)
Modi, Hemil C.
(Science and Technology Corp. Moffett Field, CA, United States)
Date Acquired
August 10, 2018
Publication Date
June 25, 2018
Subject Category
Air Transportation And Safety
Report/Patent Number
Meeting Information
Meeting: AIAA Aviation Forum 2018
Location: Atlanta, GA
Country: United States
Start Date: June 25, 2018
End Date: June 29, 2018
Sponsors: American Inst. of Aeronautics and Astronautics
Funding Number(s)
Distribution Limits
Public Use Permitted.
unmanned aviation systems traffic management (UTM)
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