Airborne Technology for Distributed Air Traffic Management

Jackson, Mike; Sharma, Vivek; Haissig, Christine M.; Elgersma, Michael

doi:10.1109/cdc.2005.1582778

Cited by 13 publications

(6 citation statements)

References 40 publications

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“…Here, we use NWP data as available from the Integrated Forecast System (IFS) model of the European Centre for MediumRange Forecasts (ECMWF). Information on air traffic can, as of a few years ago, be received online from so-called flight radar data in the internet, including aircraft positions transmitted by Automatic Dependent Surveillance-Broadcast (ADSB), at least from the majority of aircraft which have such equipment (Jackson et al, 2005;de Leege et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Contrail study with ground-based cameras

et al. 2013

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Abstract. Photogrammetric methods and analysis results for contrails observed with wide-angle cameras are described. Four cameras of two different types (view angle < 90 • or whole-sky imager) at the ground at various positions are used to track contrails and to derive their altitude, width, and horizontal speed. Camera models for both types are described to derive the observation angles for given image coordinates and their inverse. The models are calibrated with sightings of the Sun, the Moon and a few bright stars. The methods are applied and tested in a case study. Four persistent contrails crossing each other, together with a short-lived one, are observed with the cameras. Vertical and horizontal positions of the contrails are determined from the camera images to an accuracy of better than 230 m and horizontal speed to 0.2 m s −1 . With this information, the aircraft causing the contrails are identified by comparison to traffic waypoint data. The observations are compared with synthetic camera pictures of contrails simulated with the contrail prediction model CoCiP, a Lagrangian model using air traffic movement data and numerical weather prediction (NWP) data as input. The results provide tests for the NWP and contrail models. The cameras show spreading and thickening contrails, suggesting ice-supersaturation in the ambient air. The ice-supersaturated layer is found thicker and more humid in this case than predicted by the NWP model used. The simulated and observed contrail positions agree up to differences caused by uncertain wind data. The contrail widths, which depend on wake vortex spreading, ambient shear and turbulence, were partly wider than simulated.

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Section: Introductionmentioning

confidence: 99%

Contrail study with ground-based cameras

et al. 2013

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“…Since FMS trajectory predictions normally contain time as an element of the trajectory, many attempts have been made to also control the flight time of the aircraft to achieve specified time goals [7][8][9][10][11].…”

Section: Fms Time Managementmentioning

confidence: 99%

Prototype flight management capabilities to explore temporal RNP concepts

Ballin

Williams

Allen

et al. 2008

2008 IEEE/AIAA 27th Digital Avionics Systems Conference

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Next Generation Air Transportation System (NextGen) concepts of operation may require aircraft to fly planned trajectories in four dimensions -three spatial dimensions and time. A prototype 4D flight management capability is being developed by NASA to facilitate the development of these concepts. New trajectory generation functions extend today's flight management system (FMS) capabilities that meet a single Required Time of Arrival (RTA) to trajectory solutions that comply with multiple RTA constraints. When a solution is not possible, a constraint management capability relaxes constraints to achieve a trajectory solution that meets the most important constraints as specified by candidate NextGen concepts. New flight guidance functions provide continuous guidance to the aircraft's flight control system to enable it to fly specified 4D trajectories. Guidance options developed for research investigations include a moving time window with varying tolerances that are a function of proximity to imposed constraints, and guidance that recalculates the aircraft's planned trajectory as a function of the estimation of current compliance. Compliance tolerances are related to required navigation performance (RNP) through the extension of existing RNP concepts for lateral containment. A conceptual temporal RNP implementation and prototype display symbology are proposed.

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“…Frazolli et al on the other hand use a concatenation of motion primitives in order to construct valid paths that avoid obstacles and achieve a desired goal pose (Frazzoli et al, 2005). On our helicopter we use a Laplacian path planning algorithm that is similar to the approach used in (Jackson et al, 2005;Connolly and Grupen, 1993;Li and Bui, 1998).…”

Section: Collision Avoidancementioning

confidence: 99%

“…This multigrid technique is described in (U. Trottenberg and Schuller, 2001) and is applied to robotic path planning in (Li and Bui, 1998) and (Jackson et al, 2005).…”

Section: Global Plannermentioning

confidence: 99%

Flying Fast and Low Among Obstacles: Methodology and Experiments

Scherer

Singh

Chamberlain

et al. 2008

The International Journal of Robotics Research

163

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Safe autonomous flight is essential for widespread acceptance of aircraft that must fly close to the ground. We have developed a methodology of collision avoidance that can be used in three dimensions in much the same way as autonomous ground vehicles that navigate over unexplored terrain. Safe navigation is accomplished by a combination of online environmental sensing, path planning and collision avoidance. Here we outline our methodology and report results with an autonomous helicopter that operates at low elevations in uncharted environments some of which are densely populated with obstacles such as buildings, trees and wires. We have recently completed over 700 successful runs in which the helicopter traveled between coarsely specified waypoints separated by hundreds of meters, at speeds up to 10 meters/sec at elevations of 5-11 meters above ground level. The helicopter safely avoids large objects like buildings and trees but also wires as thin as 6 mm. We believe this represents the first time an air vehicle has traveled this fast so close to obstacles. The collision avoidance method learns to avoid obstacles by observing the performance of a human operator.

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Airborne Technology for Distributed Air Traffic Management

Cited by 13 publications

References 40 publications

Contrail study with ground-based cameras

Contrail study with ground-based cameras

Prototype flight management capabilities to explore temporal RNP concepts

Flying Fast and Low Among Obstacles: Methodology and Experiments

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