Influence of the ionosphere on the accuracy of the satellite navigation system

Zhbankov, G. A.; Данилкин, Н. П.; Maltseva, O. A.

doi:10.1016/j.actaastro.2021.10.004

Cited by 12 publications

(4 citation statements)

References 24 publications

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“…Numerous studies have employed various techniques to enhance the precision of GNSS positioning [6][7][8]. Due to their ability to provide accurate target location data, GNSS systems have found extensive applications in remote sensing endeavors, including prevention and control efforts [9][10][11][12][13][14][15]. For instance, in [9], methods are proposed to track detailed movement patterns of individuals using GPS data, which can be integrated into a geographic information system (GIS) to identify high-endemic areas and high-risk groups, facilitating resource allocation decisions [10].…”

Section: Related Workmentioning

confidence: 99%

“…Due to their ability to provide accurate target location data, GNSS systems have found extensive applications in remote sensing endeavors, including prevention and control efforts [9][10][11][12][13][14][15]. For instance, in [9], methods are proposed to track detailed movement patterns of individuals using GPS data, which can be integrated into a geographic information system (GIS) to identify high-endemic areas and high-risk groups, facilitating resource allocation decisions [10]. In [12], the study focuses on using GNSS satellites for environmental monitoring, while [13] highlights using smartphones to monitor COVID-19 patients and confirmed cases.…”

Section: Related Workmentioning

confidence: 99%

“…Therefore, obtaining the current GNSS coordinates of targets and extending them to the current areas of targets is available. Due to their ability to furnish accurate target location data, GNSSs have found extensive application across a range of remote sensing endeavors [9][10][11][12][13][14][15], including but not limited to epidemic monitoring and geographic information systems.…”

Section: Introductionmentioning

confidence: 99%

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An Efficient GNSS Coordinate Classification Strategy with an Adaptive KNN Algorithm for Epidemic Management

Chen,

Kuo

2024

Mathematics

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In times of widespread epidemics, numerous individuals are at risk of contracting viruses, such as COVID-19, monkeypox, and pneumonia, leading to a ripple effect of impacts on others. Consequently, the Centers for Disease Control (CDC) typically devises strategies to manage the situation by monitoring and tracing the infected individuals and their areas. For convenience, “targets” and “areas” represent the following individuals and areas. A global navigation satellite system (GNSS) can assist in evaluating the located areas of the targets with pointing-in-polygon (PIP) related technology. When there are many targets and areas, relying solely on PIP technology for classification from targets to areas could be more efficient. The classification technique of k-nearest neighbors (KNN) classification is widely utilized across various domains, offering reliable classification accuracy. However, KNN classification requires a certain quantity of targets with areas (training dataset) for execution, and the size of the training dataset and classification time often exhibit an exponential relationship. This study presents a strategy for applying KNN technology to classify targets into areas. Additionally, within the strategy, we propose an adaptive KNN algorithm to enhance the efficiency of the classification procedure.

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Section: Related Workmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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An Efficient GNSS Coordinate Classification Strategy with an Adaptive KNN Algorithm for Epidemic Management

Chen,

Kuo

2024

Mathematics

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“…For instance, even though single-frequency GNSS receivers can reach subcentimeter-level accuracy using short baselines and under favorable open-sky conditions [4,5], GNSS signal delays linked to the ionosphere are still the principal issue affecting their positioning solution. This is particularly true when using the Precise Point Positioning (PPP) and long baseline approaches in both static and kinematic modes (e.g., [6,7]), restricting thus the continuous surveying of several applications such as geodynamics.…”

Section: Introductionmentioning

confidence: 99%

Cost-Efficient Multi-GNSS Station with Real-Time Transmission for Geodynamics Applications

Vidal,

Jarrin,

Rolland

et al. 2024

Remote Sensing

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GNSS is a standard tool for monitoring and studying the Earth’s dynamic environment. However, the development of dense GNSS measurements remains limited in many experiments by the cost of high-class geodetic equipment to achieve the high precision required by many applications. Recently, multi-constellation, multi-frequency, low-power and, above all, less expensive GNSS electronic chips have become available. We present a prototype of a low-cost, open-source multi-GNSS station. Our prototype comprises a dual-frequency GNSS chip, a calibrated antenna, a Raspberry Pi card and a 4G key for data transmission. The system is easy to deploy in the field and allows precise positioning in real-time and post-processing. We assess the performance of our prototype in terms of raw data quality, and quality of the obtained high rate and daily position one-year-long time series. Our results demonstrate a quality equivalent to high-class geodetic equipment and better quality than other low-cost systems proposed so far.

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Short message encryption technology of Beidou communication based on SM9

Jin,

Wang,

Guo

et al. 2024

Security and Privacy

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To reduce the security authentication time cost, forwarding delay, and enhance message security of Beidou communication short messages, this paper proposes a Beidou communication short message encryption technology based on SM9 (Mobile Code Secure Communication). This technology uses split hierarchical clustering algorithm to cluster the short message data of Beidou Communication, in order to unify the processing of similar short message data and improve the encryption efficiency of subsequent short messages. Based on the data clustering results, this paper constructs a short message forwarding verification model using the SM9 identification password algorithm, and provides the message content of the communication application protocol and the communication receiving information protocol to achieve low‐cost and efficient forwarding verification. In addition, this article improves the initial value selection of Logistic chaotic mapping by coupling the tent map with coupled mapping lattice (CML) in the spatiotemporal chaos model to generate a chaotic initial value sequence, thereby expanding the key space, enhancing the ability to resist exhaustive attacks, enhancing the randomness of the generated key parameters, and optimizing the encryption effect of short messages. The experimental results show that the short message security authentication time of the technology proposed in this article is basically controlled within 25 ms, and the minimum forwarding delay is only 23.9 ms, which can effectively resist attacks and improve the security of Beidou communication.

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Influence of the ionosphere on the accuracy of the satellite navigation system

Cited by 12 publications

References 24 publications

An Efficient GNSS Coordinate Classification Strategy with an Adaptive KNN Algorithm for Epidemic Management

An Efficient GNSS Coordinate Classification Strategy with an Adaptive KNN Algorithm for Epidemic Management

Cost-Efficient Multi-GNSS Station with Real-Time Transmission for Geodynamics Applications

Short message encryption technology of Beidou communication based on SM9

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