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IMAGE QUALITY ASSESSMENT OF HIGH-RESOLUTION SATELLITE IMAGES WITH MTF-BASED FUZZY COMPREHENSIVE EVALUATION METHOD
Image Quality Assessment High-resolution Satellite Images MTF Fuzzy Comprehensive Evaluation
2018/4/30
A Modulation Transfer Function (MTF)-based fuzzy comprehensive evaluation method was proposed in this paper for the purpose of evaluating high-resolution satellite image quality. To establish the fact...
BLOCK ADJUSTMENT AND IMAGE MATCHING OF WORLDVIEW-3 STEREO PAIRS AND ACCURACY EVALUATION
WorldView-3 RPC Block Adjustment Model DSM Image Matching
2018/4/30
WorldView-3, as a high-resolution commercial earth observation satellite, which is launched by Digital Global, provides panchromatic imagery of 0.31 m resolution. The positioning accuracy is les...
Simulation-Based Evaluation of WAAS Performance:Risk and Integrity Factors
Simulation-Based WAAS Performance Risk Integrity Factors
2015/6/29
The Wide Area Augmentation System (WAAS) uses an array of monitor stations that combine to compute GPS user corrections over the Continental U.S. Preliminary experiments have concluded that ionospheri...
Performance Evaluation of On-Airport Local Area Augmentation System Architectures
Performance Evaluation On-Airport Local Area Augmentation System Architectures
2015/6/29
Recently there has been growing demand for a Category III precision landing system architecture which is completely contained on airport property. In response, Stanford is exploring different Local Ar...
Flight Test Evaluation of a Prototype Local Area Augmentation System Architecture
Flight Test Prototype Local Area Augmentation System Architecture
2015/6/29
A Local Area Augmentation System (LAAS) architecture alternative has been developed to provide satellite navigation performance compliant with the stringent requirements for aircraft precision approac...
Evaluation of Two Types of Dual-Frequency Differential GPS Techniques under Anomalous Ionosphere Conditions
Dual-Frequency Differential GPS Techniques Ionosphere Conditions
2015/6/26
Strong ionosphere storms are a potential threat for the Local Area Augmentation System (LAAS). During these storms,large spatial and temporal gradients of the ionosphere component on the GPS signals c...
Evaluation of Signal in Space Error Bounds to Support Aviation Integrity
Evaluation of Signal in Space Error Bounds to Support Aviation Integrity
2015/6/25
The modernization of GPS and the addition of new GNSS constellations bring forth a multitude of new signals with new capabilities. One of the intended purposes of some of these new signals is the prov...
Evaluation of Signal in Space Error Bounds to Support Aviation Integrity
Evaluation Signal Space Error Bounds Support Aviation Integrity
2015/6/25
In order to make use of signals over which they have no control, aviation authorities must have a clear understanding of the commitments and capabilities of these new signals. This paper proposes equa...
Evaluation of Dual-Frequency GBAS Performance using Data from Public Receiver Networks
Dual-Frequency GBAS Performance Public Receiver Networks
2015/6/25
Kazushi Suzuki is an Assistant Manager in the Air Traffic Management and Navigation Systems Department of NEC Corporation in Fuchu, Tokyo, Japan. He received his B.S. and M.S. degrees in Electrical En...
Evaluation & Comparison of Ranging Using Universal Access Transceiver (UAT) and 1090 MHz Mode S Extended Squitter (Mode S ES)
APNT UAT Mode S ES
2014/6/24
The FAA Alternative Position Navigation and Timing effort is developing technologies to provide navigation service capable of sustaining operations in the event of the loss of Global Navigation Satell...
Evaluation of a covariance-based clock and ephemeris error bounding algorithm for SBAS
Evaluation covariance-based clock ephemeris error bounding algorithm SBAS
2014/6/24
The largest source of error uncertainty in current Space-based Augmentation Systems, which are single frequency (L1), is the ionospheric delay. In the coming years, the deployment of new signals in L5...
Accuracy Evaluation of Stereo Vision Aided Inertial Navigation for Indoor Environments
Inertial Navigation Indoor Navigation Stereo Vision Multisensor Data Fusion
2013/11/26
Accurate knowledge of position and orientation is a prerequisite for many applications regarding unmanned navigation, mapping, or environmental modelling. GPS-aided inertial navigation is the preferre...
Evaluation of nanoparticles in the performance of energetic materials
Nanoparticles Aluminum materials
2010/12/30
The addition of nanosized metal particles in propulsion systems such as solid and liquid propellants, hybrid propellant and ramjet motors has recently became a major focus of research. Significant inc...
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
2009/12/30
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 ...
Evaluation of the response of a “Long-Counter” for 241Am/Be neutrons
Neutron Cosmic radiation Fluency
2009/12/30
A “Long-Counter” neutron detector is being used in the context of the DREAB (Dosimetry of the Radiation in the Brazilian Airspace) project to monitor the integral flow of neutrons deriving from the in...