Creation of linear-angular constructions in a closed area using satellite geodetic equipment

2020 ◽  
Vol 960 (6) ◽  
pp. 13-19
Author(s):  
Yu.V. Visirov
Keyword(s):  
Geodetic Network ◽  
Weather Conditions ◽  
Traffic Flows ◽  
Gps Measurements ◽  
Polar Night ◽  
Closed Area ◽  
Radio Signals ◽  
Reference Networks ◽  
Synchronous Operation ◽  
Nearest Points

Invisibility between points can occur due to dense building location, terrain irregularities, intensive construction, and under polar night conditions. Forest thickets (the distance between the trunks up to 5 m, the closeness of the crowns start at 0,5 m) and undergrowth require cutting and clearing glades; terrain elevations, dense building setting, traffic flows and construction machines complicate the development of geodetic reference networks, the implementation of detailed surveys and construction layout. In the absence of visibility when the sides of the geodetic network make 200–500 m, it is recommended that two or more GPS receivers should work simultaneously under the same weather conditions, which compensates for errors at receiving radio signals, except for multipath and noise. With synchronous operation of the receivers, accurate coordinates and orientations for the upcoming electronic geodetic surveys are at mutually visible neighboring points obtained even without post-processing. Simultaneous GPS measurements enable finding the distance between them and horizontal angles in a closed area over the nearest points of the base and moving antennas in the building network for geodetic planning justification of detailed surveys and construction layout.

scholarly journals Emulation of Radius-to-Fix legs in Departure Routes via Fly-By Turns

2019 ◽  
Vol 11 (4) ◽  
pp. 93-106
Author(s):  
Carlos GONZAGA-LOPEZ ◽  
Florian Michael BUCHMANN ◽  
Henrik EKSTRAND ◽  
Andreas LINNÉR ◽  
Philipp Daniel SCHAAD
Keyword(s):  
High Frequency ◽  
Weather Conditions ◽  
Technical Note ◽  
Optimal Management ◽  
Traffic Flows ◽  
Bank Angle ◽  
Constant Radius ◽  
First Results ◽  
Preliminary Study ◽  
Aircraft Type

The results of a preliminary study on the emulation of radius-to-fix legs in turning departures by means of standard track-to-fix legs are presented in this technical note. While radius-to-fix equipage rates keep gradually increasing over time, a traffic mix containing aircraft with and without this navigation capability can impede an optimal management of the traffic flows whenever precise and repeatable curved flight paths are required. After test-flying various sequences of track-to-fix segments to emulate a reference constant-radius arc in a typical departure environment, the deviations to the desired flight path and the flyability aspects were assessed. The first results for a given scenario and aircraft type show an adequate path conformance for a navigation specification RNAV/RNP 1 within a certain range of aircraft performances and weather conditions. However, the reduced predictability of the roll steering when transitioning between track-to-fix segments and the high frequency in the oscillations of the bank angle may pose a problem to flight crews and passengers, respectively.

scholarly journals PECULIARITIES OF CONSTRUCTION OF GEODESIC NETWORK FOR DEVELOPMENT OF OPEN MINERAL DEPOSITS

2020 ◽  
Vol 11 (87) ◽  
Author(s):  
Oksana Serant ◽  
◽  
Olena Kubrak ◽  
Nataliia Yarema ◽  
Maksym Batura ◽  
...  
Keyword(s):  
Geodetic Network ◽  
Cost Effective ◽  
Weather Conditions ◽  
Reference Network ◽  
Satellite Measurement ◽  
Geodetic Networks ◽  
Advantages And Disadvantages ◽  
Adverse Weather ◽  
The Creation ◽  
Combination Of Methods

The creation of geodetic networks for open deposits has its own characteristics, in contrast to the creation of conventional geodetic networks. Surveying networks of support points for groups of quarries and individual quarries located in developed mining regions, as well as in large industrial, hydraulic and agricultural structures adjacent to cities, are being developed on the basis of existing networks of higher-class triangulation points. In the absence of higher-class triangulation points, open source support networks are created independently. The study of geodetic monitoring in mining, especially in deposits that are developed in an open way. The design of geodetic reference networks depends entirely on the shape of the quarry and the system of its opening. According to its form, choose the method of creating a planned geodetic basis. For the most part, a backbone network is created to further condense and create a film network.After analyzing the methods of creating a spatial reference network for open deposits, we concluded that the classical methods of creating a planned-height geodetic network on the territory of the mining enterprise are time-consuming, long-term and economically unprofitable. The GNSS method is the best for creating such networks at present. Of course, it cannot fully replace all methods due to various constraints, such as interference, lack of communication, and adverse weather conditions. Therefore, given the advantages and disadvantages of the methods analyzed in the article to create spatial networks in open fields, the authors consider it appropriate to combine the GNSS method with polygonometry, as the use of only satellite measurement method is impractical, but in combination with polygonometry -altitude networks for geodetic works. This combination significantly reduces measurement time, is less time-consuming, cost-effective and meets the accuracy requirements of the relevant networks. Approbation of the combination of methods for the creation of a spatial geodetic network for monitoring the open field was carried out at the Vilnohirsk mining and metallurgical plant.

Datum definition in the gps era

CISM journal ◽  
1988 ◽  
Vol 42 (2) ◽  
pp. 127-132
Author(s):  
Haim B. Papo ◽  
Avraham Perelmuter
Keyword(s):  
Geodetic Network ◽  
Gps Measurements ◽  
Data Source ◽  
Geodetic Control ◽  
Definition Of

The dramatic changes in geodetic practice brought about by the implementation of GPS may call for a change in our understanding and definition of the geodetic datum. The contribution of GPS measurements is divided into a “datum-definition” component and into a datumless “differential” component. In densification of geodetic control only the datumless component is to be employed. In the establishment of a primary geodetic network both components can be used. However, the datum-definition component serves mainly as a data source for determining the ever-changing relationship between the GPS datum and datum of the geodetic network.

scholarly journals Assessment of the level of influence of weather conditions on the mode of operation of the regulated intersection

2019 ◽  
Vol 298 ◽  
pp. 00077
Author(s):  
Anastasia Shevtsova ◽  
Andrey Kravchenko ◽  
Victoria Vasilyeva
Keyword(s):  
Weather Conditions ◽  
Traffic Flows ◽  
Light Control ◽  
Traffic Light ◽  
Temperature Conditions ◽  
Mode Of Operation ◽  
Traffic Light Control ◽  
Efficient Control

This article analyses the influence of weather conditions on the mode of operation of a regulated intersection. As a result of the analysis of regulatory and scientific sources, the authors established a connection between the temperature conditions of the environment and the movement of vehicles in the area of a regulated intersection. The established dependence on the result of the experiment allows us to optimize the traffic light control cycle and coordination programs depending on temperature differences, which allows more efficient control of traffic flows in the area of the regulated intersection.

Studying the homogeneity of the coordinate base SSC-2011 at arranging a special-purpose geodetic network

2021 ◽  
Vol 976 (10) ◽  
pp. 2-12
Author(s):  
A.P. Karpik ◽  
V.I. Obidenko ◽  
N.S. Kosarev ◽  
N.K. Shendrik
Keyword(s):  
Coordinate System ◽  
Geodetic Network ◽  
Positioning Accuracy ◽  
The Third ◽  
Different Types ◽  
Coordinate Base ◽  
Derived Data ◽  
Nearest Points ◽  
Coordinate Basis ◽  
Degree Of Heterogeneity

The results of studies on the SSC-2011 coordinate base homogeneity carried out in the process of linking a special-purpose geodetic network’s points to this coordinate system are presented. The research consisted of multiple determinations of the differential geodetic stations (DGS) coordinates in GSK-2011 from different types of the coordinate base of this system. In the first version, they were obtained through their binding to the nearest points of the SGN with known coordinates in the SSC-2011. In the second one, the DGS was linked to SSC-2011 by GNSS vectors to four FAGS points. In the third variant, in order to obtain these coordinates in SSC-2011 the reference were four points of the IGS network. The grid coordinates of the DGS determined in GSK-2011 from the FAGS and IGS points coincided within 1,3 cm. Those of the DGS in SSC-2011, from points of the SGN, differ from the ones obtained in the FAGS and IGS by maximum values up to 21,8 cm, 22,2 cm, 27,2 cm in the abscissa, ordinate, and position, respectively. The derived data on the degree of heterogeneity of the SGN in SSC-2011 enable concluding the impracticality of using it as the coordinate basis of this system at carrying out works, requiring positioning accuracy at the level of several centimeters.

scholarly journals Influence of weather conditions on the traffic flow parameters

2021 ◽  
Vol 67 (3) ◽  
pp. 1-10
Author(s):  
Nikola Ilić ◽  
Marijo Vidas
Keyword(s):  
Traffic Flow ◽  
Research Methodology ◽  
Meteorological Data ◽  
Weather Conditions ◽  
Traffic Flows ◽  
Local Conditions ◽  
Foreign Literature ◽  
Flow Parameters ◽  
The Town

Changes in weather conditions affect people's lifestyle in many ways. This paper presents the influence of weather conditions on the parameters of traffic flows on a two - lane suburban road. Main goal for comparing parameters of traffic flow for bad and good weather conditions is to draw conclusions about which parameters and to what extent are affected by different weather conditions. Based on the foreign literature, it is necessary to define an appropriate research methodology adapted to local conditions and apply it in an adequate way in order to obtain the most accurate results and draw conclusions. In this study, the influence of rainfall on the reduction of anxiety and traffic flow in the vicinity of the town of Loznica is presented. Based on meteorological data for 2019, a sample of days and hours when it rained was determined and compared with days when there was no precipitation.

scholarly journals Design of Optical Wireless Networks with Fair Traffic Flows

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Artur Tomaszewski
Keyword(s):  
Programming Model ◽  
Optical Network ◽  
Weather Conditions ◽  
Network Design Problem ◽  
Traffic Flows ◽  
Elastic Traffic ◽  
Slowing Down ◽  
Optical Transmission Systems ◽  
Network States ◽  
Bad Weather

The paper presents a method for optimising the wireless optical network that carries elastic packet traffic. The particular focus is on modelling the effect of elastic traffic flows slowing down in response to the decrease of the optical transmission systems’ capacity at bad weather conditions. A mathematical programming model of the network design problem is presented that assumes that the packet rates of elastic traffic flows decrease fairly. While practically any subset of network links can be simultaneously affected by unfavourable transmission conditions, a particular challenge of solving the problem results from a huge number of network states considered in the model. Therefore, how the problem can be solved by generating the most unfavourable network states is presented. Moreover, it is proved that it is entirely sufficient to consider only the states that correspond to the decrease of capacity on a single link. Finally, as the general problem is nonlinear, it is shown that the problem can be transformed to a linear MIP problem and solved effectively when single-path routing of traffic flows is assumed.

scholarly journals Development of multiparameter equations for satellite monitoring analysis of traffic flow

2018 ◽  
Vol 143 ◽  
pp. 04009 ◽  
Author(s):  
Alexander Testeshev ◽  
Vera Timohovetz ◽  
Tatyana Mikeladze
Keyword(s):  
Traffic Flow ◽  
Dynamic Characteristics ◽  
Road Networks ◽  
Weather Conditions ◽  
Satellite Monitoring ◽  
Flow Modeling ◽  
Traffic Flows ◽  
Mathematical Methods ◽  
The Road ◽  
Multiparameter Equations

The paper is dedicated to the development of multiparameter equations of traffic flows for satellite monitoring analysis of the road networks of major cities. Use of multiparameter dependences will allow interpreting the road situation by transforming a static image into dynamic characteristics of traffic and refuse from multiple mono-dependences which account road and weather conditions. Multiparameter dependences are developed based on mathematical methods for traffic flow modeling. The issue of using cartographic resources with updatable databases are investigated, sufficient amount of observation samples was determined for development of reliable functional dependences. The suggested method allows minimizing resource expenses on creation of calculation framework for analysis of network monitoring results for traffic flows on road networks of modern metropolises.

On optimization of geodetic reference networks of accelerators using laser trackers

2017 ◽  
Vol 923 (5) ◽  
pp. 2-6
Author(s):  
P.P. Murzincev ◽  
А.V. Polianskiy ◽  
L.E. Serdakov
Keyword(s):  
Geodetic Network ◽  
Geometric Parameters ◽  
Design Stage ◽  
Laser Tracker ◽  
Technological Equipment ◽  
Mean Square ◽  
Geodetic Networks ◽  
Reference Networks ◽  
Mean Square Errors ◽  
Laser Trackers

The features of laser tracker measurements and their accounting for designing geodetic networks on the accelerator complexes are considered. The key parameters for the optimization of the spatial geodetic network of the accelerator are proposed. The dependence of average mean square errors on the radial and altitudinal directions of orientation of the sighting beam for distances from 1 to 30 meters was defined. The influence of the choice of stations for mounting the laser tracker to determine the parameters of the ellipsoid of errors was studied. The measurements for three variants of geodetic networks in the tunnel with the adopted geometric parameters were simulated. The data of the deviations of the points of the network radius, altitude relative to the project was indicated. The obtained results can be useful both at the design stage of geodetic network accelerator, and at the stage of installation of technological equipment.

scholarly journals Holding Area Conceptual Design and Validation for Various Urban Air Mobility (UAM) Operations: A Case Study in Seoul–GyungIn Area

2021 ◽  
Vol 11 (22) ◽  
pp. 10707
Author(s):  
Youngjae Lee ◽  
Junseok Lee ◽  
Jae-Woo Lee
Keyword(s):  
Operating Systems ◽  
Traffic Congestion ◽  
Weather Conditions ◽  
Urban Air ◽  
Concept Design ◽  
Traffic Flows ◽  
The World ◽  
Turning Radius ◽  
Bad Weather

As populations become concentrated in cities, traffic congestion increases, and urban air mobility (UAM) is being considered to face this problem. Accordingly, many institutions and companies around the world are developing UAM vehicles, building infrastructure, and researching flight operating systems. In this study, three holding area concepts have been designed that can control air traffic flows and avoid bad weather conditions when UAM vehicles are operating. These holding areas have been considered to allow UAM vehicles to fly by avoiding collisions with other UAM vehicles or structures such as buildings. After validating the turning radius analysis with existing aircraft, a case study on the holding area concept design for the Seoul–GyungIn area was performed to determine whether UAM vehicles can turn within a narrow radius. It was not possible for winged-type UAM vehicles to turn across the Han River at cruise speed. The holding area concepts and the turning procedure of this study can be used as guidelines when designing UAM corridors or UAM flight routes.

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