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Multi-DMEs for alternative position, navigation and timing (A-PNT)

Published online by Cambridge University Press:  14 December 2021

Xiao Liang Open the ORCID record for Xiao Liang [Opens in a new window] ,
Carl Milner ,
Christophe Macabiau  and
Philippe Estival
Xiao Liang*
Affiliation:
Ecole Nationale de l'Aviation Civile (ENAC), Toulouse, France.
Carl Milner
Affiliation:
Ecole Nationale de l'Aviation Civile (ENAC), Toulouse, France.
Christophe Macabiau
Affiliation:
Ecole Nationale de l'Aviation Civile (ENAC), Toulouse, France.
Philippe Estival
Affiliation:
Direction des services de la navigation aérienne de la DGAC (DSNA), Toulouse, France
*
*Corresponding author. E-mail: [email protected]
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Abstract

Distance measuring equipment (DME/DME) as the main reversionary method provides alternative positioning, navigation and timing (A-PNT) services for use during a Global Navigation Satellite System (GNSS) outage. Considering the geometry limitation of DME/DME, multi-DMEs with better geometry can be used to increase the accuracy and integrity performance of positioning. This paper discusses the opportunities and challenges related to use of multi-DMEs as an alternate source of positioning, navigation and timing. To support the performance for A-PNT, the basic idea is considering the existing installed equipment. In this paper, barometer altimeter and TACAN are used to help improve the performance of A-PNT provided by multi-DMEs both in accuracy and integrity. Based on the database of EUROCONTROL, the test results demonstrate that 79⋅7% of a reference area roughly matching with the continental European locations achieve RNP 1 using multi-DMEs when the DME measurement accuracy is 0⋅2 NM (95%). When the DME measurement accuracy is 0⋅1 NM (95%), 87⋅9% of the reference area can achieve RNP 1 using multi-DMEs. The usage of barometer/TACAN measurements aided multi-DMEs improves the performance of the accuracy and integrity monitoring.

Keywords

navigationintegrityrequired navigational performance (RNP)
Type
Research Article
Information
The Journal of Navigation , Volume 75 , Issue 3 , May 2022 , pp. 625 - 645
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Copyright
Copyright © The Author(s), 2021. Published by Cambridge University Press on behalf of The Royal Institute of Navigation

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