Results 21 to 30 of about 580,865 (313)

Research on BeiDou anti-spoofing technology based on comprehensive radio determination satellite service

open access: yesSatellite Navigation, 2020
The BeiDou system (BDS) plays a significant role in people’s lives, but its security is easily affected by spoofing attacks. The radio determination satellite service (RDSS) is a special service of BDS that provides two-way communication, positioning ...
Fei Wang   +4 more
doaj   +1 more source

Identifying Oil Spill Types Based on Remotely Sensed Reflectance Spectra and Multiple Machine Learning Algorithms

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021
An accurate identification of oil spill types is the basis of determining the source of leakage, evaluating the potential damage, and deciding a plan of responses for an oil spill event.
Ying Li   +5 more
doaj   +1 more source

LTE NLOS Navigation and Channel Characterization [PDF]

open access: yes, 2022
Navigation with terrestrial wireless infrastructure is appealing to overcome geometrical limitations of satellite navigation for users in environments with limited sky views.
Tufvesson, Fredrik   +6 more
core   +1 more source

BOC Signal Acquisition Algorithm Based on Similar Enfoldment

open access: yesInternational Journal of Aerospace Engineering, 2020
A BOC signal has been widely used in the Global Navigation Satellite System (GNSS). Although the BOC signal has many advantages, the autocorrelation function (ACF) of the BOC signal has lots of peaks, which makes signal acquisition difficult.
Qi Han   +5 more
doaj   +1 more source

Conflict Resolution Strategy Based on Flight Conflict Network Optimal Dominating Set

open access: yesInternational Journal of Aerospace Engineering, 2022
Aiming at the problem that the air traffic flow is increasing year by year and the flight conflicts are difficult to be deployed, we take aircraft as the node and established a flight conflict network based on the flight conflict relationship between ...
Minggong Wu   +4 more
doaj   +1 more source

The Attack Navigator [PDF]

open access: yes, 2016
The need to assess security and take protection decisions is at least as old as our civilisation. However, the complexity and development speed of our interconnected technical systems have surpassed our capacity to imagine and evaluate risk scenarios.
Christian W. Probst   +2 more
openaire   +5 more sources

Towards Operational Systems for Continuous Navigation of Rescue Teams [PDF]

open access: yes, 2008
Self-protection is of rescue teams has absolute priority over all other objectives. Nevertheless rescue workers, such as fire fighters often face conditions that impose a combination of threats on them: severe physical and mental stress, limited or no ...
Mohammed Khider   +5 more
core   +1 more source

Adaptive filtering applications to satellite navigation [PDF]

open access: yes, 2010
PhDDifferential Global Navigation Satellite Systems employ the extended Kalman filter to estimate the reference position error. High accuracy integrated navigation systems have the ability to mix traditional inertial sensor outputs with navigation ...
Zhahir, Md Amzari
core   +3 more sources

A navigation algorithm inspired by human navigation [PDF]

open access: yes2012 IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining, 2012
Human navigation has been a topic of interest in spatial cognition from the past few decades. It has been experimentally observed that humans accomplish the task of way-finding a destination in an unknown environment by recognizing landmarks. Investigations using network analytic techniques reveal that humans, when asked to way-find their destination ...
M. Vijesh   +5 more
openaire   +2 more sources

Rail Digital Map Construction on GNSS Denied Areas

open access: yes, 2023
A Digital Map of the rail infrastructure in a key element to support the adoption of GNSS in railway signalling and satisfy the strict accuracy and integrity requirements even in the presence of feared events that may hinder the positioning solution.
D’Orazio, Francesca   +5 more
core   +1 more source

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