Determination of Coverage Area of Nigeria Television Authority (NTA), Television Signal in Kebbi State, Nigeria

2019 ◽  
Author(s):  
Aaron Tsado Kolo ◽  
Moses Stephen Abiodun ◽  
Joel Aghaegbunam Ezenwora
Keyword(s):  
Coverage Area ◽  
Television Signal

Determination of Cell Coverage Area and its Applications in High-Speed Railway Environments

2017 ◽  
Vol 66 (5) ◽  
pp. 3515-3525 ◽  
Author(s):  
Bo Ai ◽  
Ruisi He ◽  
Guangkai Li ◽  
Ke Guan ◽  
Danping He ◽  
...  
Keyword(s):  
High Speed ◽  
Coverage Area ◽  
High Speed Railway ◽  
Cell Coverage

Determination of percentage of linear coverage area in railways

2015 ◽  
Author(s):  
Ruisi He ◽  
Jianwen Ding ◽  
Zhangdui Zhong ◽  
Bo Ai ◽  
Ruifeng Chen
Keyword(s):  
Coverage Area

scholarly journals MODELING OF KOARMADA MARINE OPERATIONS II BASED ON THE THREAT PREDICTION FROM INTELLIGENCE WITH A MULTI CRITERIA DECISION MAKING APPROACH

JOURNAL ASRO ◽  
2021 ◽  
Vol 12 (01) ◽  
pp. 128
Author(s):  
Fa'iq Mumtaz Muhammad ◽  
Budisantoso Wirjodirdjo ◽  
Okol Sri Suharyo ◽  
Yudha Sukma Perdana
Keyword(s):  
Decision Makers ◽  
Military Operations ◽  
Coverage Area ◽  
Fuel Savings ◽  
National Jurisdiction ◽  
The Republic ◽  
Security Operations ◽  
Operations Other Than War ◽  
Selection Of

Indonesia as archipelagic country, needs strong maritime sector security. The Indonesian Navy in Law Number 34 Year 2004 has been given the mandate to safeguard the sovereignty of the Republic of Indonesia. The Armada II Command as Kotamaops annually carries out Military Operations Other Than War (OMSP) which is carried out under the command of Guspurla and Guskamla. Intelligence information regarding the estimated threat / contingency that will occur is very influential on decision makers in operational planning. With the contingency provided by the intelligence staff, it is necessary to have an appropriate marine operation modeling. In a multi-operation operation, it is necessary to have a supporting attribute, that is, a base ship. The purpose of this study is to formulate an operation modeling using the selection of a headquarter ship which is preceded by the determination of contingency priorities. This study uses MCDM which consists of MCDA and MCDO which uses the integration of the Delphi method, AHP, Fuzzy weighting, Goal programming and linear Integer-Zero one programming. Based on the processing of Delphi and AHP, in determining the threat of OMSP, it is influenced by the number / intensity of incidents of 20.4%; impact of Ipoleksosbudhankam 29.4%, Capabiity 38.2% and involvement factor of 12.1% where national jurisdiction marine security operations are selected as the first priority. Meanwhile, in the selection of the headquarters ship which functions to coordinate the KRI in carrying out sector patrols, using the FWH and IGP, the KRI was chosen as the Sigma class to be the headquarters ship. This modeling uses 22 of the 24 KRI that have been allocated by obtaining an increase in the optimization of the coverage area and fuel savings.. Keywords: OMSP, MCDM, Contigency, headquarters warship and Maritime Security Operations

scholarly journals Performance measure of satellite flying in coplanar and non-coplanar formation

2018 ◽  
Vol 7 (4.13) ◽  
pp. 66
Author(s):  
Nor Affendy Yahya ◽  
Renuganth Varatharajoo ◽  
A Salahuddin M Harithuddin ◽  
Syaril Azrad
Keyword(s):  
High Efficiency ◽  
Orbital Plane ◽  
Performance Measure ◽  
Low Earth Orbit ◽  
Coverage Area ◽  
3 Dimensional ◽  
Parametric Studies ◽  
Multiple Variables ◽  
Orbit Period

In order to fulfil specific mission objective demand, spacecraft performance can be further optimized by means of various methods or configurations. Like for instance, selection of orbit type and inclination with a periodically repeated ground track will ensure the high efficiency of ground target coverage be accomplished throughout the whole duration of mission. Unfortunately, a single monolithic satellite most often unable to accommodate the requirement solicitated by many multi background users. So, to deal with the issue, an alternative solution would be to operate a swarm of satellites flying in synchronized formation. In this paper, three satellites flying in co-planar and non-coplanar formation were simulated. Here, the resulting model of two deputy satellites operating in the same orbital plane but different phase angle moved along the orbit path while both still maintaining constant relative distance with the non-coplanar chief spacecraft throughout the whole orbit period were presented. The use of unique projected circular orbit (PCO) formation arrangement allows the assessment of some important performance measure parameters like average overlapping coverage area and optimum swath width coverage distance. For the determination of area on the surface of the Earth overlapped by three satellites, the analysis was done using the multiple boundary overlap condition. Parametric studies were conducted involving different formation distance and formation height to observe pattern variation of average total overlapping area and maximum coverage distance. Preliminary result showed that at a specific Earth central angle, the total overlapped area decreased substantially with the increased distance in formation. Height factor does not have significant influence in the total overlapped area variation due to constraint imposed on satellites operating in Low Earth Orbit (LEO) altitude regime. Results were tabulated using 3-dimensional graphs to study the relationships exist between multiple variables. Finally, conclusions were made based on our findings with regards to the performance of positioning satellites in such configuration. 

scholarly journals Mathematical modeling of aerodynamic behavior of antenna-mast structures when designing communication on railway transport

2018 ◽  
Vol 77 (2) ◽  
pp. 77-83 ◽  
Author(s):  
A. A. Loktev ◽  
V. V. Korolev ◽  
O. I. Poddaeva ◽  
K. D. Stepanov ◽  
I. Yu. Chernikov
Keyword(s):  
High Speed ◽  
Wind Tunnels ◽  
Railway Transport ◽  
Aerodynamic Coefficients ◽  
Security Systems ◽  
Coverage Area ◽  
Legal Documents ◽  
Small Antennas ◽  
Wind Influence

Due to the development of high-speed operation, the problem of providing high-quality communication channels for train passengers, control and security systems, caused by the difficulty of fast positioning of the carriage, the large Doppler extension of the transmitted signal and the increasing amount of data transferred, is becoming especially topical at present. Two solutions can be conceptually possible in order to increase the coverage area near the railroad right-of-way: installation of a set of relatively small antennas of transmitting stations along the track or installation of powerful transmitters on high antenna-mast structures. Communication facilities exceeding 75 m are classified as particularly dangerous, technically complex communication facilities, and communication facilities exceeding 100 m, - as unique facilities. According to normative legal documents for structures classified as particularly dangerous, technically complex or as unique objects, it is necessary to additionally determine the aerodynamic coefficients by blowing structures in wind tunnels or by recommendations developed by specialized organizations. In view of the above, it is relevant to solve the problem of developing recommendations for the determination of aerodynamic coefficients and its approval as a guiding regulatory and technical document. This study is devoted to the development of a mathematical model for the behavior of an antenna-mast structure under wind influence, which would allow determining the aerodynamic coefficients when collecting loads on newly designed or currently ope rated structures, and also adequately predict the behavior and condition of the object at various stages of the life cycle.

Determination of Sensor Network Coverage using Probabilistic Approach

1970 ◽  
Vol 111 (5) ◽  
pp. 7-10
Author(s):  
J. Gorecki ◽  
B. Miedzinski ◽  
H. Nouri
Keyword(s):  
Quality Of Service ◽  
Sensor Network ◽  
Lower Cost ◽  
Probabilistic Approach ◽  
Network Coverage ◽  
Coverage Area ◽  
Single Sensor ◽  
Quality Of Service Parameters

Paper elaborates the method to identify near and far coverage area for each sensor estimating quality of service parameters in order to assess the areas of sensor redundancy and shortage. Coverage in near area is used to identify whether single sensor is enough to cover this area (sensor shortage indicating denser sensor layout). Coverage in far area is used to identify which sensors can be removed from the field in order to have lower cost of deployment of sensor network (sensor redundancy). Ill. 3, bibl. 7, tabl. 1 (in English; abstracts in English and Lithuanian).http://dx.doi.org/10.5755/j01.eee.111.5.345

scholarly journals Determination of MS Location through Building Using AoA Method of Frequency 47 GHz

2018 ◽  
Vol 1 (3) ◽  
pp. 76
Author(s):  
Andrita Ceriana Eska
Keyword(s):  
Mobile Station ◽  
Knife Edge ◽  
Coverage Area ◽  
Localization Technique ◽  
Location Determination ◽  
Building Environment ◽  
Station Location ◽  
Error Percentage ◽  
Selection Of

This research discusses the determination of mobile station (MS) location of the uplink communication system. The location determination mobile station is based on the angle-of-arrival (AoA) method. The communication propagation is influenced by building environment. The building environment was modeled with diffraction method. Several diffraction methods were used such as single knife edge, and multiple knife edge method. The communication frequency used was 47 GHz. The analysis used percentage value at coverage area and comparison of error percent values between two method to determine mobile station location. The percentage of the communication coverage area obtained was 71.4% or of 255 from 300 nodes. The comparison methods used for mobile station location determination were the selection of the best SNR and localization technique. The error percentage value based on the selection of the best SNR method is 0.95%. The error percentage value based on localization technique method is 0.78%.

scholarly journals Determination of the efficiency of a multiple launch rocket system

2021 ◽  
Vol 2021 (3) ◽  
pp. 37-47
Author(s):  
E. Hladkyi ◽  
◽  
O. Zavoloka ◽  
Keyword(s):  
Packing Problem ◽  
Hexagonal Structure ◽  
Coverage Area ◽  
Damage Area ◽  
Destruction Efficiency ◽  
Relative Damage ◽  
Extent Of Damage ◽  
Optimum Relation ◽  
Suggested Criterion

Up-to-date multiple launch rocket systems (MLRSs) are adopted by many countries of the world, and they are an effective weapon against dispersed multiple targets. Developing and upgrading MLRSs calls for estimating their efficiency with the aim to select an optimum alternative. For an MLRS, the basic measure of area target destruction efficiency is the relative damage area. This measure depends on the damage area of the MLRS itself (extent of damage by one salvo). The paper suggests a relative criterion that allow one to estimate and optimize the salvo damage area. The criterion is based on the ratio of the salvo damage area to the maximum damage area and that of the undamaged area to the coverage area. The coverage area is defined as the area of the enveloping convex polygon for all points of missile impact in a salvo. It is shown that the domain of variation of the suggested criterion is the interval [0, 1]. Using the suggested criterion for 4 points of missile impact with a circular damage area, two basic structures are studied: a rhomb (two regular triangles) and a square. For them, optimum distances between the missile impact points that maximize the destruction level are determined. It is shown that the obtained optimum arrangement of missile impact points allows one to bring the extent of damage for the square structure to the more optimum rhomb layout (represents a part of the hexagonal structure, which is the most efficient from the standpoint of the packing problem). For a 16-missile salvo, it is shown that from the standpoint of the suggested criterion there exists an optimum relation between the missile damage area (radius) and the technical scattering parameters. The maximum value of the criterion for a missile salvo with account for the technical spread does not exceed 0.33 and is much lower than the value that can be obtained for the optimum structures (rhomb and square). The paper shows possibilities of using the criterion in deciding on optimum missile impact points with account for various typical targets within a multiple target and missile damage area configurations other than a circle.

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