Sarah V. Ligda

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The present research examines operational performance and verbal communication in airline flight crews under reduced crew operations (RCO). Eighteen two-pilot crews flew six scenarios under three conditions; one condition involved current-day operations while two involved RCO. In RCO flights, the Captain initially operated the simulated aircraft alone but(More)
This document describes the second human-in-the-loop study in a series that examines the role of a ground operator in enabling single pilot operations (SPO). The focus of this study was decision-making and communication between a distributed crew (airborne pilot and ground operator). A prototype ground station and tools designed to enhance collaboration(More)
NASA’s Flight Deck Display Research Laboratory recently investigated air traffic automation designed to alleviate groundside workload in high traffic environments. This paper examines the data from post-experiment debriefings. We found that pilots are comfortable reviewing automated conflict resolutions, as well as modifying those resolutions before(More)
This paper reports on the performance and workload of pilots participating in a human-in-the-loop simulation of interval management operations during a continuous descent approach (CDA) into Louisville International Airport (SDF). The experiment examined variations in pilot roles and responsibilities in an implementation of interval management automation.(More)
A primary feature of the NextGen is trajectory based operations (TBO). Under TBO aircraft flight plans are known to computer systems on the ground that aid in scheduling and separation. FANS is presently the primary flight deck system in the US supporting TBO, but relatively few aircraft are FANSequipped. Thus any near-term implementation must provide TBO(More)
Managing the interval between arrival aircraft is a major part of the en route and TRACON controller’s job. In an effort to reduce controller workload and low altitude vectoring, algorithms have been developed to allow pilots to take responsibility for, achieve and maintain proper spacing. Additionally, algorithms have been developed to create dynamic(More)
This report investigates issues surrounding TBO procedures for the current aircraft fleet when requesting deviations around weather. Air and ground procedures were developed to stringently follow TBO principles using three types of communication: Voice, ACARS, and FANS. ACARS and FANS are both text-based communication systems, but FANS allows uplinked(More)
A primary feature of the Next Generation Air Transportation System (NextGen) is trajectory based operations (TBO). Under TBO, aircraft flight plans are known to computer systems on the ground that aid in scheduling and separation. The Future Air Navigation System (FANS) was developed to support TBO, but relatively few aircraft in the US are FANS-equipped.(More)
Pilot workload was examined during simulated flights requiring flight deck-based merging and spacing while avoiding weather. Pilots used flight deck tools to avoid convective weather and space behind a lead aircraft during an arrival into Louisville International airport. The study examined concepts placing conflict avoidance responsibility on different(More)