TY - GEN
T1 - Separation risk evaluation in nextgen air traffic management system
AU - Zhao, Peng
AU - Liu, Yongming
N1 - Funding Information:
The research reported in this paper was supported by funds from NASA University Leadership Initiative program (Contract No. NNX17AJ86A, project officer: Kai Goebel). The support is gratefully acknowledged.
Publisher Copyright:
© 2019 by Timothy K. Minton. Published by the American Institute of Aeronautics and Astronautics, Inc.
PY - 2019
Y1 - 2019
N2 - The separation error caused by the Automatic Dependent Surveillance-Broadcast (ADS-B) positional uncertainty between two nearby aircrafts is studied in this paper. The condition when the separation error risk occurs is investigated based on the scenario of satellite navigation in civil aviation. To keep safe separation, many existing studies focused on the positional uncertainty quantification for a single aircraft using Global Navigation Satellite System (GNSS), for example, position accuracy and protection level (PL). Thus, correlation effect of uncertainties from multiple aircrafts is ignored. The present study demonstrates that the correlation effect is important for the separation risk evaluation involving two or more aircrafts. It is observed in this paper that the separation risk should be paid attention when two aircrafts are using different satellite-sets to navigate. A method is developed to evaluate an aircraft’s risk-probability of unsafe separation with an aircraft in the vicinity. The probability bound is calculated under the satellite fault hypotheses based on the conservative assumption of the aircraft using different satellite-sets with the target aircraft. Several simulation examples are used to illustrate the application of the proposed method for the risk evaluation in a time-varying environment at certain airspaces.
AB - The separation error caused by the Automatic Dependent Surveillance-Broadcast (ADS-B) positional uncertainty between two nearby aircrafts is studied in this paper. The condition when the separation error risk occurs is investigated based on the scenario of satellite navigation in civil aviation. To keep safe separation, many existing studies focused on the positional uncertainty quantification for a single aircraft using Global Navigation Satellite System (GNSS), for example, position accuracy and protection level (PL). Thus, correlation effect of uncertainties from multiple aircrafts is ignored. The present study demonstrates that the correlation effect is important for the separation risk evaluation involving two or more aircrafts. It is observed in this paper that the separation risk should be paid attention when two aircrafts are using different satellite-sets to navigate. A method is developed to evaluate an aircraft’s risk-probability of unsafe separation with an aircraft in the vicinity. The probability bound is calculated under the satellite fault hypotheses based on the conservative assumption of the aircraft using different satellite-sets with the target aircraft. Several simulation examples are used to illustrate the application of the proposed method for the risk evaluation in a time-varying environment at certain airspaces.
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U2 - 10.2514/6.2019-1361
DO - 10.2514/6.2019-1361
M3 - Conference contribution
AN - SCOPUS:85083941388
SN - 9781624105784
T3 - AIAA Scitech 2019 Forum
BT - AIAA Scitech 2019 Forum
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
T2 - AIAA Scitech Forum, 2019
Y2 - 7 January 2019 through 11 January 2019
ER -