Results 61 to 70 of about 58,961 (242)
SAR deceptive jamming target-detection method based on multi-angle SAR images
The Journal of Engineering, 2019 Deceptive jamming is an effective jamming method for synthetic aperture radar (SAR). Time-delay repeater jamming, which is an important method of deceptive jamming because of its simplicity and effectiveness, can generate false targets in the SAR image ...
Gen Li +5 more
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Safety Control for Satellite Formation Flying via High-Order Control Barrier Functions
Applied SciencesIn satellite formation flying, maintaining a predefined safety distance between the reference satellite and its accompanying satellites is critical to prevent collisions—a requirement that traditional control methods fail to satisfy.
Xu Zhang +3 more
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A Novel Method for Designing General Window Functions with Flexible Spectral Characteristics
Sensors, 2018 In the field of sensor signal processing, windows are time-/frequency-domain weighting functions that are widely applied to reduce the well-known Gibbs oscillations.
Yinghao Sun +3 more
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Remote SensingThe positioning performance of the Global Navigation Satellite System (GNSS) network real-time kinematic (NRTK) depends on regional atmospheric error modeling.
Hao Liu +5 more
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DDMA MIMO radar system for low, slow, and small target detection
The Journal of Engineering, 2019 The low, slow, and small (LSS) target detection has always been a problem for both ground-based and air-borne radar systems. The factors such as weak target reflection energy, ground clutter, and random Doppler component will have a severe impact on ...
Fawei Yang +3 more
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Real-time integrity monitoring for a wide area precise positioning system
Satellite Navigation, 2020 The wide area precise positioning system (WAPPS) is a high-precision positioning system based on a global navigation satellite system. Using a GEO satellite or a communication network, it provides users, in its service area, with real-time satellite ...
Yuechen Wang, Jun Shen
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A principal positioning system for the Earth [PDF]
arXiv, 2003 The project SYPOR wishes to use the global navigation satellite system GALILEO as an autonomous relativistic positioning system for the Earth. Motivations and a sketch of the basic concepts underlying the project are presented. For non geodetic (perturbed) satellites, a two-dimensional example describes how the dynamics of the constellation of ...
arxiv
PPP models and performances from single- to quad-frequency BDS observations
Satellite Navigation, 2020 Nowadays, China BeiDou Navigation Satellite System (BDS) has been developed well and provided global services with highly precise positioning, navigation and timing (PNT) as well as unique short-message communication, particularly global system (BDS-3 ...
Shuanggen Jin, Ke Su
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Diffusive chaos in navigation satellites orbits [PDF]
arXiv, 2016 The navigation satellite constellations in medium-Earth orbit exist in a background of third-body secular resonances stemming from the perturbing gravitational effects of the Moon and the Sun. The resulting chaotic motions, emanating from the overlapping of neighboring resonant harmonics, induce especially strong perturbations on the orbital ...
arxiv
Frontiers in PhysicsWith the rapid advancement of pulse technology, given the extraordinarily high repetition frequency of high-repetition pulse interference, with pulse widths typically ranging from a few nanoseconds to several hundred nanoseconds, it possesses ultra ...
Yili Song +10 more
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