Feasibility Demonstration of Terrestrial RNP with LDACS

Osechas, Okuary; Narayanan, Shrivathsan; Crespillo, Omar García; Zampieri, Gianluca; Battista, Giuseppe Di; Kumar, Rachit; Schneckenburger, Nicolas; Lay, Elisabeth; Belabbas, Boubeker; Meurer, Michael

doi:10.33012/2019.17119

Cited by 10 publications

(5 citation statements)

References 9 publications

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“…Moreover, an air-to-air mode of LDACS is being researched on with the goal of extending LDACS coverage to the airspace that cannot be directly covered by ground stations [24], [25]. The navigation performance achievable using LDACS was measured in previous flight trials [26], [27]. Those flight trials focused solely on the LDACS navigation performance and employed GSs only capable of transmitting and an AS only capable of receiving.…”

Section: Ldacs Backgroundmentioning

confidence: 99%

LDACS Flight Trials: Demonstration and Performance Analysis of the Future Aeronautical Communications System

Bellido-Manganell

Gräupl

Heirich

et al. 2022

IEEE Trans. Aerosp. Electron. Syst.

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The L-band Digital Aeronautical Communications System (LDACS) is a key enabler of the new air traffic services and operational concepts necessary for the modernization of the air traffic management (ATM). After its initial design, compatibility tests with legacy L-band systems, and functional demonstrations in the laboratory, the system is currently undergoing the standardization process of the International Civil Aviation Organization (ICAO). However, LDACS has not been demonstrated in flight yet. In this paper, we present the first in-flight demonstration of LDACS, which took place in March and April 2019 in southern Germany and included four LDACS ground stations and one LDACS airborne station. We detail the experimental setup of the implemented LDACS ground and airborne stations together with the flight routes, the conducted experiments, and the frequency planning to ensure compatibility with legacy systems. In addition, we describe the demonstrated ATM applications and the security measures used to protect them. Based on the obtained measurement results, we evaluate the LDACS in-flight communication performance for the first time, including the achieved communication range, the measured end-to-end message latency, and the LDACS capability to provide quality of service by effectively prioritizing safety-relevant data traffic. Furthermore, we use the in-flight received signal power to assess the applicability of a theoretical path loss model. These flight trials contribute to the final steps in the development of LDACS by providing its in-flight communication performance and by demonstrating: first, its correct functionality in a realistic environment; second, its capability of supporting ATM applications and the advanced security measures that can be used to protect them; and third, its spectrum compatibility with legacy systems. We conclude that LDACS is ready to support ATM operations and that LDACS frequency planning can safeguard legacy systems successfully.

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Section: Ldacs Backgroundmentioning

confidence: 99%

LDACS Flight Trials: Demonstration and Performance Analysis of the Future Aeronautical Communications System

Bellido-Manganell

Gräupl

Heirich

et al. 2022

IEEE Trans. Aerosp. Electron. Syst.

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“…The analyses of this work are based on measurements made during nine flights performed between the 9 th and 13 th of July 2018 (Osechas et al, 2019) The analyses of this paper only focus on the flight sections for which barometric pressure measurements were available. Each of these sections covers most of each flight, with the exception of short intervals at the initial and final portions of the flights.…”

Section: Experimental Flight Datamentioning

confidence: 99%

Geodetic Altitude from Barometer and Weather Data for GNSS Integrity Monitoring in Aviation

Simonetti,

Crespillo

2024

navi

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Vertical navigation is crucial for safe aircraft separation and has been traditionally based on the pressure altitude provided by barometric altimeters. New aviation operations require robust determination of geodetic altitude and are expected to primarily rely on a global navigation satellite system (GNSS). Because deviations between pressure and geodetic altitudes can reach hundreds of meters, an altitude harmonization is needed to use barometers in combination with GNSS. In this paper, we first present a methodology to compute an accurate geodetic altitude from barometer and external weather data. Secondly, we derive error and threat models of this geodetic altitude. Finally, we employ these models within a GNSS integrity monitoring algorithm augmented with the derived altitude.We assess our methodologies against flight test measurements and availability simulations of localizer performance with vertical guidance operations. These analyses illustrate the potential benefits of employing barometers as augmentation or stand-alone systems for geodetic altitude navigation.

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“…The LDACS transmitters provide signals that can be used for navigation (i.e. RAS) with the results from a flight test evaluating LDACS RAS-based navigation presented in [25]. The use of LDACS for navigation is an ongoing effort.…”

Section: Development Of Apntmentioning

confidence: 99%

An Overview of the Proposed Mode N System in the Context of Alternative Position, Navigation, and Timing (APNT) Development

Weaver¹,

Zampieri²,

Osechas³

2021

Proceedings of the 2021 International Technical Meeting of the Institute of Navigation

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This paper introduces the Mode N system concepta terrestrial navigation system intended for aviationdeveloped by the air navigation service provider (ANSP) of Germany, Deutsche Flugsicherung. Proposed as a new system, Mode N is presented in the context of other alternative position, navigation, and timing (APNT) systems because it blends aspects of these systems together in its own design. This paper leverages that characteristic by identifying the similarities with other APNT systems and tailoring the large body of APNT work to evaluate Mode N and model the range accuracy for the Mode N signal. This range accuracy model is then used in a basic coverage assessment for Germany.

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Feasibility Demonstration of Terrestrial RNP with LDACS

Cited by 10 publications

References 9 publications

LDACS Flight Trials: Demonstration and Performance Analysis of the Future Aeronautical Communications System

LDACS Flight Trials: Demonstration and Performance Analysis of the Future Aeronautical Communications System

Geodetic Altitude from Barometer and Weather Data for GNSS Integrity Monitoring in Aviation

An Overview of the Proposed Mode N System in the Context of Alternative Position, Navigation, and Timing (APNT) Development

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