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A model problem, based on the NACA0012 airfoil, is studied. The thickness distribution of the symmetric NACA0012 airfoil is optimally approximated with a 4th-order Bezier curve. This best-fit ap...
In order to reflect the impact of spatial ionospheric gradients on Local Area Augmentation System (LAAS) users, the LAAS Ground Facility (LGF) broadcasts a conservative standard deviation (σvert_iono_...
The ionosphere spatial gradient and its temporal rate of change in the vicinity of a LAAS-equipped airport are likely to influence the architecture required to meet the Category II/III precision appro...
The original error description for the Local Area Augmentation System (LAAS) assumed unbiased measurement errors. In practice, however, satellite ranging errors may exhibit nonzero means. The LAAS err...
This paper describes the impact that extreme ionospheric spatial gradients occurring during severe ionosphere storms have on GNSS Ground Based Augmentation Systems (GBAS) and how the U.S. Local Area A...
Strong ionospheric scintillation due to electron density irregularities inside the ionosphere is commonly observed in the equatorial region during solar maxima. Strong amplitude scintillation causes d...
Anomalous ionospheric conditions can cause large variations in propagation delays of transionospheric radio waves, such as global navigation satellite system (GNSS) signals. Although very rare, extrem...
RF interference (RFI) has been and will continue to be a significant worry for GNSS users. This paper introduces several different types of RFI, categorizes them based upon the intent (if any) of the ...
Personal privacy devices (PPDs) are low-cost jammers to mask GPS signals, so that the location of the host vehicle is not revealed to other parties. Although it is illegal to use PPDs in the United St...
Advanced RAIM, or ARAIM, extends and improves upon the traditional RAIM algorithm to detect and mitigate independent, multiple, and correlated GPS signal faults. While ARAIM depends on multiple redund...
While aircraft environmental performance has been important since the beginnings of commercial aviation, continuously increasing passenger traffic and a rise in public awareness have made aircr...
The focus of the present study is to determine the feasibility of including noise and emissions constraints in the early design of the aircraft and mission. This paper introduces the design tool and...
The Satellite Launch Vehicle developed in Brazil employs a specialized unit at the launch center known as the Movable Integration Tower. On that tower, fixed and movable work floors are installed for ...
Air transportation has been su ering for decades from delays caused by air trac congestion. This paper presents the e ect of aircraft performance di erences on air trac delays. Rate of climb and cru...

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