Results 11 to 20 of about 12,565 (197)
Autonomous Lunar L1 Halo Orbit Navigation Using Optical Measurements to a Lunar Landmark
Navigation, 2023 Autonomous cislunar spacecraft navigation is critical to mission success as communication to ground stations and access to global positioning system (GPS) signals could be lost. However, if the satellite has a camera of sufficient quality, geometric line-
Mark B. Hinga, Dale A. Williams
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Navigation, 2023 This paper presents a terrestrial networked positioning system that obtains a reliable time reference from a national time scale realization and distributes it in a prototype to six roadside base stations through a fiber-optic Gigabit Ethernet network ...
Christian Tiberius +5 more
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Navigation, 2023 Antenna arrays and spatial processing techniques are among the most effective countermeasures against interference. Here, we demonstrate a new array concept consisting of spatially-distributed subarrays that are small enough to fit inside the non ...
Marius Brachvogel +5 more
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Multi-layered Multi-Constellation Global Navigation Satellite System Interference Mitigation
Navigation, 2023 Several layers of defense can be implemented in a global navigation satellite system (GNSS) receiver to improve its performance in the presence of interference.
Ciro Gioia, Daniele Borio
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PRN Sequence Estimation with a Self-Calibrating 40-Element Antenna Array
Navigation, 2023 This work explores the use of a low-cost global navigation satellite system (GNSS) antenna array including front-ends and a global navigation satellite system (GNSS) software receiver to receive signals of opportunity (SoO) whose pseudorandom noise (PRN)
Dominik Dötterböck +4 more
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Navigation, 2023 This paper describes the design, analysis, and experimental evaluation of a new landmark-based localization method that integrates light detection and ranging (lidar) with an inertial measurement unit (IMU).
Ali Hassani, Mathieu Joerger
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Navigation, 2023 This paper investigates the application of a vector tracking approach to carrier phase tracking for improved tracking in degraded signal environments. In contrast to many vector-based carrier phase tracking approaches, the algorithms described in this ...
Scott M. Martin
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Navigation, 2023 New GNSS applications demand resilience against radio interference and high position accuracy. Separately, these demands can be fulfilled by multi-antenna systems using spatial filtering and carrier-phase positioning algorithms like real-time kinematic ...
Tobias Bamberg +2 more
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Reconstructing GNSS Meta-Signal Observations Using Sideband Measurements
Navigation, 2023 Global navigation satellite systems (GNSSs) provide several signals on different frequencies: Two or more components can be processed jointly as a meta-signal.
Daniele Borio, Ciro Gioia
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A Consistent Regional Vertical Ionospheric Model and Application in PPP-RTK Under Sparse Networks
Navigation, 2023 Ionospheric augmentation is one of the most important dependences of PPP-RTK. Because of the dispersive features of the ionosphere, the ionospheric information is usually coupled with satellite- and receiver-related biases.
Sijie Lyu +5 more
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