A Risk Assessment of Geomagnetic Conditions Impact on GPS Positioning Accuracy Degradation in Tropical Regions Using Dst Index

2021 ◽  
Author(s):  
Nenad Sikirica ◽  
Franc Dimc ◽  
Oliver Jukic ◽  
Teodor B. Iliev ◽  
Darko Spoljar ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Positioning Accuracy ◽  
Tropical Regions ◽  
Gps Positioning ◽  
Dst Index

Study on the Application of Computer in the Taxi Intelligent Management System

2014 ◽  
Vol 945-949 ◽  
pp. 3364-3368
Author(s):  
Min Fan
Keyword(s):  
System Integration ◽  
Management System ◽  
Evaluation System ◽  
Service Evaluation ◽  
Time Sharing ◽  
Start Time ◽  
Positioning Accuracy ◽  
Safe Driving ◽  
Gps Positioning ◽  
Intelligent Terminal

the taxi intelligent terminal management system using the latest GPS and Beidou Positioning Technology and network technology, embedded programming technology, Windows CE terminal operating system, cloud computing technology, the original taxi valuation multiple system, GPS positioning system, the taxi service evaluation system, intelligent light system, monitoring system and one card system. Integration, design a set of complete city taxi intelligent terminal management system, to achieve a high level of management. Double backup location system using GPS positioning and Chinese Beidou Positioning, positioning accuracy, reliable, real-time operational data store upload taxi and reliable data, which can realize safe driving record, automobile security alarm, accident alarm and anti-theft alarm and tracking and control, in the taxi can achieve "flat-share carpool", can realize the time-sharing, people, time, metering and billing and other functions, and improves the bearing rate of the vehicle, more energy saving and environmental protection. The system has broad application prospects and the market space. The system will realize some technical indicators: receive 10 channels, the positioning accuracy of <5 meters, the cold start time <30 seconds, hot start time <3 seconds, GPS relocation time <30 seconds.

Improvement of GPS positioning accuracy by ionosphere delay correction

2007 ◽  
Author(s):  
Nao Akiyama ◽  
Toshiyuki Tanaka ◽  
Masashi Yonekawa
Keyword(s):  
Positioning Accuracy ◽  
Gps Positioning ◽  
Delay Correction

scholarly journals Environmental Risk Assessment: A Geomorphic Investigation over the Bolpur-Santiniketan-Illambazar Lateritic Patch of Birbhum District, West Bengal, India

2020 ◽  
Vol 66 (2) ◽  
pp. 94-110
Author(s):  
Vibhash C Jha ◽  
◽  
Subhasis Ghosh ◽  
Keyword(s):  
Risk Assessment ◽  
Environmental Risk ◽  
Land Degradation ◽  
Environmental Risk Assessment ◽  
Soil Profile ◽  
Mass Movement ◽  
Lateritic Soil ◽  
Degraded Land ◽  
Irrigation Network ◽  
Tropical Regions

A proper geomorphic study of a region can be useful in understanding past and present environmental circumstances and analyzing potential environmental risks. Careful analysis of morphodynamic processes and existing diagnostic landforms reveal several aspects about the origin, characteristics and possible pattern of morpho-climatic interactions on the landscape over temporal scale, which helps significantly in proper terrain evaluation from societal welfare and integrated management point of view, including environmental risk assessment and disaster management. This paper has made a thorough geomorphic investigation based on intensive fieldwork and multi-sourced remote sensing data to characterize the lateritic soil profile and landforms of the study area in respect to their morphology and Physico-chemical properties at the different sites of land degradation to understand the outcome of morphoclimatic interactions on the landscape over time, and to evaluate the severity of operation with pedo-geomorphic constraints in the lateritic environment for sustainable management purposes. It is found that the region is highly sensitive to weathering, mass movement and denudational activities, mainly caused by rainwater erosion which has resulted into varied landforms including well-developed rills and gullies, lateritic ridges, isolated residual hills etc and generated a unique identity to this part of the lateritic region. The study also suggested a model for the development of geomorphic landforms in a lateritic terrain based on past and present morphoclimatic interactions, nature of physiography, lithology, soil characteristics and other biotic and abiotic elements. The region is also found to be a subject to moderate to severe land degradation due to the active geomorphic processes in operation in tropical regions and inherently poor physical and chemical formation of the existing soil profile and radical conversion of land uses as observed at cadastral level leading towards irresistible desertification. Annual topsoil loss amount has been calculated using the Universal Soil Loss Equation method. Three sample Mouzas namely Ballavpur, Shyambati and Chawpahari jungle have been assessed to be having 36.98%, 71.42% and 61.73% of degraded land in respect to their total village area. Various conservative measures like stabilization of gully heads and beds through reforestation and afforestation with cutting earth plug, brush fills and check dams; improvement of the irrigation network, suitable dryland farming etc. have been recommended to arrest the desertification process.

scholarly journals Research on the Tower Pole Tilt Mechanism and Risk Assessment Technology Based on BeiDou reverse network RTK

2020 ◽  
Vol 165 ◽  
pp. 03011
Author(s):  
Zhi Shen ◽  
Wei Yu ◽  
Bao Song ◽  
Hongwu Wang ◽  
Junpeng Li ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Transmission Line ◽  
Low Cost ◽  
Transmission Tower ◽  
Positioning Accuracy ◽  
Position Information ◽  
Network Rtk ◽  
Digital Management ◽  
Differential Positioning ◽  
Current Monitoring

In order to solve the problems of inaccurate and untimely monitoring and high false alarm rate in the current monitoring of the tower pole tilt attitude, this paper proposes a technology for monitoring the tower pole tilt attitude based on RTK technology of Beidou reverse network. This method uses reverse network RTK differential positioning algorithm, which can improve the positioning accuracy of the low-cost Beidou/GNSS positioning terminal and make the positioning accuracy of the tower pole tilt monitoring reach the millimeter level. In this paper, the tilt attitude information of the transmission line tower is measured and calculated by using the height and position information of the transmission line tower, and then the risk assessment is carried out, so as to control the tilt attitude and assess the risk of the transmission line tower. The actual test results show that the method can obtain the information of the tilt attitude of transmission tower pole accurately and reliably, and can be used to evaluate it, which meets the requirements of intelligent, accurate and digital management.

scholarly journals Invasive Potential of Pet-Traded Pill-Box Crabs from Genus Limnopilos

Diversity ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 91 ◽  
Author(s):  
Jiří Patoka ◽  
Lucie Bohatá ◽  
Tomáš Karella ◽  
Jana Marková ◽  
Ernik Yuliana ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Native Species ◽  
Continuous Monitoring ◽  
Global Perspective ◽  
Decapod Crustaceans ◽  
Invasive Potential ◽  
Pet Trade ◽  
Climate Matching ◽  
Tropical Regions ◽  
Freshwater Crabs

The pet trade in aquatic animals is known to be one of the main sources of non-native species worldwide. Freshwater decapod crustaceans have increased in popularity as ornamentals in the last two decades. Freshwater crabs of the genus Limnopilos were discovered by hobby aquarists and introduced on the market in 2008. They are generally considered interesting additions to an aquarium, but information about their living requirements are scarce. Additionally, their invasive potential is not known. Here, we present a survey of the availability of Limnopilos crabs on the market in Europe and North America and analyzed the invasive potential of all species from the genus based on climate matching from a global perspective. The only species recorded in the pet trade is L. naiyanetri, but future introduction of other species is discussed. Certain tropical regions were identified as the most suitable for the potential establishment of Limnopilos crabs including the northern part of South America, and L. microrhynchus was evaluated as the highest risk species. In this pilot study, we also suggest some points to be answered regarding further improving the risk assessment and also recommend continuous monitoring of the market for ornamental decapods.

Experimental Study on Accuracy of GPS Positioning

2012 ◽  
Vol 263-266 ◽  
pp. 346-349 ◽  
Author(s):  
Hong Shi ◽  
Dong Hai Qiao
Keyword(s):  
Global Positioning System ◽  
Small Area ◽  
Positioning System ◽  
Gps Receiver ◽  
Positioning Accuracy ◽  
Gps Positioning ◽  
Global Positioning ◽  
Open Ground ◽  
Geophysical Measurement ◽  
Measured Distance

Geophysical measurement relies on the positioning accuracy of GPS (global positioning system). Usually the positioning accuracy is area dependent. This paper uses a commercially available GPS receiver to verify its positioning accuracy with practical measurement in a small area. With a measurement setup in an open ground, the results show that even for the fixed point, the GPS measured positioning error of about 0.234 meter could be observed for a period of time. Of 12 GPS measured distance errors, only one is about 5.7 meters, all others are within the range of 3-5 meters of GPS receiver specification.

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