Deduplication of tracked objects position data at single observation point of a Vessel Monitoring System

2015 ◽  
Vol 201 (2) ◽  
pp. 23-32
Author(s):  
Jędrzej Hajduczenia ◽  
Jarosław Jarosław Sadowski ◽  
Sylwester Kaczmarek
Author(s):  
A. V. Lyusak ◽  
K. M. Nikolaichuk

Relevance of the research. A scientific and theoretical analysis of the legislation in the field of monitoring of land use and protection was carried out. The problem of information imperfection on the quantitative and qualitative state of land resources, which is the basis of land monitoring, was identified. The problem of land monitoring is the imperfection of the monitoring system itself, namely the collection of information on the land state, the spread of degradation processes by various entities of monitoring. The current Regulations on land monitoring were considered and it is proposed to provide for the expansion of the types of analytical work, to adapt the European standards in the selection, transportation and storage of soil samples, to impose mandatory quality control on all works. According to the current legislation of Ukraine, the main task of monitoring is to monitor the dynamics of the processes taking place in the field of land management. Monitoring data are used in making decisions on construction, establishing permitted types of land use, which help prevent land degradation. The updated monitoring data enable public administration bodies to make appropriate demands to land users to eliminate the violations in the field of land use and protection, as well as to bring to justice those responsible for these violations. To ensure the effective functioning of the unified monitoring system, it is necessary to solve a number of organizational, technical and other problems. The main disadvantages of this system are the obsolescence of technical, methodological and information equipment of the monitoring system centers used during observations; lack of a single observation network; inconsistency of separate information technologies used by different entities of monitoring; inconsistency of normative-technical and normative-legal provision with modern requirements. These problems can be solved by creating a new network of observations, but it requires a large amount of funding. The Concepts of the State Target Program for the development of land relations in Ukraine and the Concepts of the State Program for Environmental Monitoring were considered, which provide for the improvement of the land monitoring by maximizing the existing potential and gradual improvement of organizational, legal, methodological and technical support of the monitoring system, taking into account current information needs and the recommendations of the UN Economic Commission for Europe. A necessary requirement for the effective counteraction to violations of land legislation and non-compliance with the norms of rational land use is the improvement of the regulatory framework for land monitoring. It is necessary to clearly specify the following: the purpose and objectives of monitoring as well as the methods of its implementation; main stages and steps of the land monitoring procedure; powers of the implementation entities of this procedure; basic criteria and standards for evaluating the state of land resources and crisis detection. It is also necessary to develop and legislate the procedure for Ukraine's participation in international monitoring studies on land conditions, etc. Currently in Ukraine there is no single methodology for conducting observations, due to the lack of monitoring networks, as well as a modern information system on the state of natural resources, in particular - land. According to scientists, the monitoring requirements are currently met only by agrochemical inspection of agricultural land, however, it is not monitoring: certification does not give a complete picture of land condition; it is not carried out on permanent plots and by a very limited list of indicators and focuses only on the evaluation of individual characteristics, without identifying numerous other physical, chemical and biological indicators. Conclusions. According to the current legislation, the land monitoring system is improved by defining and developing standards and regulations in the field of land use and protection, including protection and reproduction of soil fertility. Improving the land monitoring procedure in Ukraine requires the development and implementation of a set of mechanisms for coordinating the interaction and coordination of all monitoring entities using a single system of methods and technologies in planning, organizing and conducting observations and joint activities, which will facilitate the rapid response of local executive bodies and governments to the occurrence or threat of emergencies and proper control over their development and elimination of consequences. The main areas of developing the land monitoring system include: improving organizational and legal support of monitoring; establishing a single integrated monitoring system; optimizing land monitoring methods, determining and developing standards and regulations in the field of land use and protection; ensuring the integration of information resources; strengthening the coordination of the activities of monitoring entities and data management within the state system of land monitoring in Ukraine; participating in international monitoring studies on land condition and harmonization of national standards with the international ones in order to integrate the national land monitoring system in the international systems.


2017 ◽  
Vol 75 (3) ◽  
pp. 988-998 ◽  
Author(s):  
Jennifer L Shepperson ◽  
Niels T Hintzen ◽  
Claire L Szostek ◽  
Ewen Bell ◽  
Lee G Murray ◽  
...  

Abstract Understanding the distribution of fishing activity is fundamental to quantifying its impact on the seabed. Vessel monitoring system (VMS) data provides a means to understand the footprint (extent and intensity) of fishing activity. Automatic Identification System (AIS) data could offer a higher resolution alternative to VMS data, but differences in coverage and interpretation need to be better understood. VMS and AIS data were compared for individual scallop fishing vessels. There were substantial gaps in the AIS data coverage; AIS data only captured 26% of the time spent fishing compared to VMS data. The amount of missing data varied substantially between vessels (45–99% of each individuals' AIS data were missing). A cubic Hermite spline interpolation of VMS data provided the greatest similarity between VMS and AIS data. But the scale at which the data were analysed (size of the grid cells) had the greatest influence on estimates of fishing footprints. The present gaps in coverage of AIS may make it inappropriate for absolute estimates of fishing activity. VMS already provides a means of collecting more complete fishing position data, shielded from public view. Hence, there is an incentive to increase the VMS poll frequency to calculate more accurate fishing footprints.


2020 ◽  
Author(s):  
Marina Rosas-Carbajal ◽  
Yves Le Gonidec ◽  
Dominique Gibert ◽  
Jean de Bremond d'Ars ◽  
Jean-Christophe Ianigro ◽  
...  

<p>Characterizing volcano-hydrothermal activity is crucial for understanding the dynamics of volcanos and the relation between surface observations and deep magmatic activity. It may be also relevant for detecting precursors to magmatic and phreatic eruptions. Traditional monitoring tools such as seismicity and deformation are not always sensitive to hydrothermal activity, therefore it is important to explore new tools that can provide complementary information about the system.</p><p>Muon imaging is increasingly used as a novel tool to complement standard geophysical methods in volcanology, allowing to image large volumes of a geological body from a single observation point. Continuous measurements of the muon flux enable to infer density changes in the system. In volcanic hydrothermal systems, this approach helps to characterize processes of steam formation, condensation, water infiltration and storage. Here we present the results of a combined study in the La Soufrière de Guadeloupe volcano (West Indies, France) where continuous measurements of muon tomography were acquired simultaneously to seismic noise. The combination of these two methods helps to characterize a short-term, shallow hydrothermal event, its localization, and the involved volumes in the volcano. The deployment of networks of various sensors including temperature probes, seismic antennas and cosmic muon telescopes around volcanoes could valuably contribute to detect precursors to more hazardous hydrothermal events.</p>


2012 ◽  
Vol 220-223 ◽  
pp. 1456-1459 ◽  
Author(s):  
Xiang Dong Pei ◽  
Qiu Lin Tan ◽  
Si Min Zhu ◽  
Ji Jun Xiong

Flexible Overland Freight Monitoring System for Hazardous Chemicals, with the functions of tracking and localized, is designed. Sensor network, which is the integration of sensor technology, embedded and wireless technology, is a novel technique about data acquiring and processing. Some technologies cooperated with diagnosis are included, such as sensor, data collection, signal analysis, data processing, database, and net transmission. To achieve the hazardous chemicals from the production, storage, transportation to the whole process of remote real-time tracking and monitoring,This system receives real-time GPS position data, and sends it to internet through GPRS net. And with the technique of GIS, it realizes managing and monitoring tankers at the watching center. The converter has interfaces of GSM protocol and can send the control information and data of the control center to any terminal in the GSM network. Likewise the remote data can be transmitted to the control center with the converter. Controlled by central control system, the system can operate automatically and continuously.


2001 ◽  
Vol 32 (2) ◽  
pp. 65-84 ◽  
Author(s):  
Ronny Berndtsson ◽  
Cintia Uvo ◽  
Minoru Matsumoto ◽  
Kenji Jinno ◽  
Akira Kawamura ◽  
...  

Research during the latest years has indicated a significant connection between climate and solar activity. Specifically, a relationship between Northern Hemisphere air temperature and sunspot cycle length (SCL) has been shown. By using monthly SCL and land air temperature from 1753-1990 (238 years) we show that this relationship also holds for a single observation point in south of Sweden. Using data after 1850 yields a statistically significant linear correlation of 0.54 between SCL and mean temperature. Furthermore, we show that there are indications of a low-dimensional chaotic component in both SCL and the interconnected mean land air temperature. This has important implications for hydrology and water resources applications. By pure definition of chaos this means that it is virtually impossible to make long-term predictions of mean temperature. Similarly, because of the strong connection between temperature and many hydrological components, it is probable that also long-term water balance constituents may follow chaotic trajectories. Long-term projections of water resources availability may therefore be impossible. Repeated short-term predictions may however, still be viable. We exemplify this by showing a technique to predict interpolated mean temperature 6 and 12 months ahead in real time with encouraging results. Improving the technique further may be possible by including information on the SCL attractor. To summarize, research into the possible existence of chaotic components in hydrological processes should be an important task for the next years to come.


IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
R. Villalpando-Hernandez ◽  
D. Munoz-Rodriguez ◽  
C. Vargas-Rosarles ◽  
E. Mera

Sensors ◽  
2021 ◽  
Vol 21 (12) ◽  
pp. 3946
Author(s):  
Mohamed Khalaf-Allah

Passive ground emitter geolocation techniques are essential to electronic warfare systems, as they provide threat warnings in hostile environments, while ensuring the electronic silence of the mission platform. Geolocation of enemy emitters indicates the position of and type of adversary troops, and allows for the use of guided munition against enemy targets. Three-dimensional geolocation solutions based on least squares and particle filter estimation, using only azimuth and elevation measurements, were considered. Three batch-processing and one instantaneous solution algorithms, i.e., using a single pulse or a single observation point, were developed and investigated. The performance of the proposed solutions was demonstrated by simulations. Results showed that the batch-processing solutions achieved acceptable accuracies with a sufficient number of observation points. The performance degraded with fewer observation points. The instantaneous geolocation solution improved performance with increasing observation points, i.e., working in the sequential mode, and therefore could approach the accuracy of the batch-processing solutions.


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