搜索结果: 1-14 共查到“航空、航天科学技术 Impact”相关记录14条 . 查询时间(0.203 秒)
A Systematic Study on the Impact of Dimensionality for a Two-Dimensional Aerodynamic Optimization Model Problem
Systematic Study Impact Dimensionality Two-Dimensional Aerodynamic Optimization Model Problem
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2015/7/3
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...
Assessment of Ionospheric Impact on LAAS Using WAAS Supertruth Data
Ionospheric Impact LAAS WAAS Supertruth Data
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2015/6/26
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_...
LAAS Ionosphere Spatial Gradient Threat Model and Impact of LGF and Airborne Monitoring
LAAS Ionosphere Spatial Gradient Threat Model Airborne Monitoring
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2015/6/26
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 Impact of Measurement Biases on Availability for CAT III LAAS
Measurement Biases Availability CAT III LAAS
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2015/6/26
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...
The Impact and Mitigation of Ionosphere Anomalies on Ground-Based Augmentation of GNSS
Ionosphere Anomalies Ground-Based Augmentation GNSS
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2015/6/25
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...
Availability Impact on GPS Aviation due to Strong Ionospheric Scintillation
Availability Impact GPS Aviation due Strong Ionospheric Scintillation
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2015/6/24
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...
Targeted Parameter InflationWithin Ground-Based Augmentation Systems to Minimize Anomalous Ionospheric Impact
Parameter Infl ationWithin Ground-Based Augmentation SystemsIonospheric
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2015/6/24
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...
The Impact of Uninformed RF Interference on GBAS and Potential Mitigations
Uninformed RF Interference GBAS Potential Mitigations
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2015/6/24
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 ...
Impact of Personal Privacy Devices for WAAS Aviation Users
Impact Personal Privacy Devices WAAS Aviation Users
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2015/6/24
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...
The Impact of GPS Modernization on Standalone User Performance and Integrity with ARAIM
Impact GPS Modernization Standalone User Performance Integrity ARAIM
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2015/6/24
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...
AIRCRAFT OPTIMIZATION FOR MINIMAL ENVIRONMENTAL IMPACT
AIRCRAFT OPTIMIZATION plane
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2015/6/18
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...
AIRCRAFT OPTIMIZATION FOR MINIMAL ENVIRONMENTAL IMPACT
MINIMAL ENVIRONMENTAL IMPACT plane
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2015/6/18
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...
Evaluation of the impact of convolution masks on algorithm to supervise scenery changes at space vehicle integration pads
Scenery supervision Convolution mask Digital image processing
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2010/10/25
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 ...
Impact of Aircraft Performance Characteristics on Air Traffic Delays
Aircraft performance Air traffic management Air traffic control Air traffic delay Flight
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2009/10/12
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...