GPS

Open Access Article

1 - investigation of land cover changes using remote sensing technique (Case study: Katalan unit)
Maryam Nazemi jalal Marzieh Alikhah-Asl Elham Forootan

10.30495/jest.2024.74410.5882

Background and Objective: Updated and correct information is necessary for using and optimized managing of a land. Land cover map is one of the most important information resources in natural resource management. The goal of this research is to provide Katalan land cove More

Background and Objective: Updated and correct information is necessary for using and optimized managing of a land. Land cover map is one of the most important information resources in natural resource management. The goal of this research is to provide Katalan land cover map for investigating land use changes during 12 years in this area. Material and Methodology: For this purpose, satellite images such as Landsat ETM 2001 and OLI 2013 were used after performing necessary corrections whereas; GPS and topographic maps were implemented for surveying fields and gathering trained samples. Land cover maps were provided using supervised classification method with maximum likelihood algorithm. Findings: The results of this study revealed that the study area comprises six classes viz. irrigated farm land, rainfed farm land, bare land, rock stone, range land and mine class. The overall accuracy and kappa coefficient for 2013 map were estimated 86.11% and 0.82, respectively and theses values for 2001 land use map were 78.26%, and 0.71, respectively. Discussion and Conclusions: The results of this research revealed that the class of farm land, bare land and range land were increased 1.84%, 1.29%, and 1.21%from 2001 to 2013, and the class of rock stone and rainfed farmland were decreased 5.09%, and 0 .62%, respectively. Also, there was not mine class in 2001 but this class was 1.36% equivalent to 49.3939 hectare of the whole area in 2013. Manuscript profile

Open Access Article

2 - Optimal location of municipal wastes tanks using GIS (Case study: Shahindezh city)
zahra yazdani Mohammad Talaeian

10.22034/jest.2019.42390.4572

Background and Objective: Waste management is responsible for carrying out various processes to attract citizens' satisfaction. Proper placement of temporary storage tanks in the city is important. Therefore, the optimal location of municipal waste tanks is very importa More

Background and Objective: Waste management is responsible for carrying out various processes to attract citizens' satisfaction. Proper placement of temporary storage tanks in the city is important. Therefore, the optimal location of municipal waste tanks is very important. In addition, not using waste storage tanks in suitable places can cause environmental damage and negative effects on the beauty of the city landscape. The purpose of this study is to locate municipal waste tanks using powerful tools of GIS. Analysis Method: Waste pollution and its dangers are inevitable for communities. Traditional methods such as manually overlay maps are not possible due to the large amount of data. So, in this research a powerful tool such as GIS has been used in locating municipal waste tanks. For this purpose, 58 blocks in 4 regions with a population of 12 thousand households in the city of Shahindezh in West Azerbaijan province have been studied. Findings: According to the map obtained from GPS, the location of the main tanks in the city of Shahindezh was investigated. With having information on population density, production waste per capita, observing the specified distances and using the geographic information system, the centers purposed for the waste location tanks in this study were determined. So that by weighting the layers and superimposing the layers of maps in GIS software, it resulted in providing 804 points for locating reservoirs in the city. Discussion and Conclusion: Looking at the findings and in order to prevent irregular traffic of garbage trucks, reduce fuel, reduce the environmental impact of waste accumulated in inappropriate places and maximize use of the appropriate perspective, using the results of this research, temporary waste storage tanks can be used in appropriate numbers in the right places and created a safe environment which to be environmentally friendly with high security factor. Manuscript profile

Open Access Article

3 - The Crossed-Dipole Antenna with Torang-shaped Parasitic Elements and Circular Polarization for GPS Application
Amir Siahcheshm

10.30495/jce.2024.2002047.1239

This paper presents a circularly polarized (CP) printed crossed-dipole antenna for Global Positioning System (GPS) receptions in the L1 (1575 MHz) band. Its structure consists of two orthogonally printed dipoles, two integrated baluns to feed the dipoles, and a feed net More

This paper presents a circularly polarized (CP) printed crossed-dipole antenna for Global Positioning System (GPS) receptions in the L1 (1575 MHz) band. Its structure consists of two orthogonally printed dipoles, two integrated baluns to feed the dipoles, and a feed network connected to the baluns. The feeding network comprises a Branch-Line Coupler with two quadrature outputs. Accordingly, providing two orthogonal dipoles with a 90-degree phase difference leads to right-handed circular polarization (RHCP), a must for GPS applications. Four Torang-shaped parasitic elements have been used in the upper part of the dipole arms to improve the circular polarization of the antenna. Based on the practical results obtained with the technique, the antenna's Axial Ratio (AR) bandwidth is increased by about 21%. At the same time, the purity of the circular polarization can also be seen. The experimental results show that the proposed GPS antenna has an impedance bandwidth of 46.28% (from 1.327 to 2.126 GHz), an axial ratio bandwidth of 41.36% (from 1.329 to 2.022 GHz), and a maximum gain of 6.40 dB. The dimensions of the proposed antenna are compact, and this antenna has a stable radiation pattern. In the last step, the proposed GPS antenna is fabricated and tested in the antenna laboratory. Manuscript profile

Open Access Article

4 - Vehicle tracking and control system using GPS and GSM
Behzad Kadkhodaei Saman Kazemi

The purpose of designing this system is to provide a cheap and convenient solution for monitoring and monitoring the route of vehicles by the operator. This system consists of two parts. The main part is installed on the device and receives location information via GPS More

The purpose of designing this system is to provide a cheap and convenient solution for monitoring and monitoring the route of vehicles by the operator. This system consists of two parts. The main part is installed on the device and receives location information via GPS equipment and sends it to the receiver via GSM modem. By connecting the receiver to the computer and running google earth software, the movement of the device can be seen In addition, information such as the car is on, relocation, alarm, doors are open or closed, etc. can be received by SMS at the request of the operator. Also, according to the conditions, the necessary commands such as turning off, etc. can be executed by sending an SMS. Manuscript profile

Open Access Article

5 - Improving Interrupter Synchronization in CIPS Cathodic Protection Test for Gas Transmission Pipelines
Majid Nosouhi Mohsen Ashourian Hamid Nazemi

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Open Access Article

6 - Production of Digital Elevation Model of Marvdasht Plain Using ENVISATASAR Radar Images with C-Wavelength Comparison with GPS Points and 1:25000 Topographic Maps of South Zagros Region
Alireza Karimi

Digital Elevation Model is a continuous statistical representation of the earth by a large number of selected points with known coordinates of length, width and height. The use of three-dimensional models of the earth's surface has a wide range of applications in many a More

Digital Elevation Model is a continuous statistical representation of the earth by a large number of selected points with known coordinates of length, width and height. The use of three-dimensional models of the earth's surface has a wide range of applications in many areas of research and implementation. It is high and the areas are level. All the resulting points have a height above sea level. Most GIS spatial analyzes use elevation data such as DEM. Using it, you can prepare a slope map and slope direction and perform various analyzes in three dimensions. Most of the time, DEM is also used as the bottom view of the maps. Elevation is used to extract height and height data. Major users (DEM) in the fields of civil engineering, surveying and photogrammetry, earth sciences, water resources management, military applications, telecommunications, urban planning digital land models as one of their information layers to achieve management, executive goals or produce new products using location-based. In this study, using images of ASAR ENVI SAT sensors in C band in the study area, we prepared a digital elevation model and then compared. And for verification, we compared this prepared model with the existing topographic maps at the scale of 1.25000 as well as the fixed points of GPS stations and also with the digital model obtained from (SRTM) in terms of elevation. The results of radar image processing in C bands of ENVI SAT ASAR sensor and its comparison with the data of the surveying organization indicate that the data processed from C band gives more favorable results and close to the ground control points, but considering Due to the correlation between GCP points and DEM obtained from topography, production conditions using satellite images are not favorable for the region. GCP captured the height points of radar images are in better and more favorable conditions according to Table (4) which shows the standard difference and this indicates the superiority of radar images for DEM production. Digital model comparison ratio with topographic points, shows the accuracy of satellite images in flat areas. In mountainous areas, due to the inclination of the points and creation of incoherence points, it is not continuous shadow and the level curve lines are intermittent. Manuscript profile

Open Access Article

7 - Calculating of Taftan volcano displacement using PSI technique and Sentinel 1 images
Mahdieh Shirmohamadi Seyed Mohammad Tavakkoli Sabour Parviz Zeaiean Firooz Abadi Javad Sadidi

10.30495/jrors.2024.2002141.1202

Taftan is a semi-active volcano located in southeast Iran with many craters. The main objective of this study is to investigate whether subsidence or uplift in Taftan Peak. 58 Sentinel 1-A images acquired from January 2015 to December 2020 in the ascending orbit mode, a More

Taftan is a semi-active volcano located in southeast Iran with many craters. The main objective of this study is to investigate whether subsidence or uplift in Taftan Peak. 58 Sentinel 1-A images acquired from January 2015 to December 2020 in the ascending orbit mode, and 102 Sentinel 1-A Sentinel 1-B images acquired from October 2014 to June 2020 in the descending orbit mode were preprocessed for this purpose. The interferograms with the permanent scatterer interferometry (PSI) method were created using SARPROZ and StaMPS softwares, in which atmospheric corrections were made automatically,  and then the surface displacement of Taftan volcano estimated.The Line of Sight (LOS) displacement corresponding to the uplift was 0.5 mm to 1 mm yr-1 for the ascending orbit and 1 mm yr-1for the descending orbit. Because no GPS station was close to Taftan volcano, the GPS measurements of one station located in the study area (Saravan station) was used to check the accuracy of PSI method. The GPS station of SARAVAN has situated inside the town ,and it is appropriate to use and analyze PSI technique in this station. As a result, the researchers found that the PSI method is in accordance with the GPS data.  Manuscript profile

Open Access Article

8 - Proposing a New Method to Optimize the Routing in the Distribution of Vendors' Goods Using the Internet of Things (IoT)
Mohammad Sadegh Jahan

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Open Access Article

9 - Studying of Central Alborz's crustal velocity by using ANN method
Tohid malekzadeh Dilmaghani

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Open Access Article

10 - Modelling of relation between large earthquakes and ionosphere electron density using GPS data
Tohid malekzadeh Dilmaghani

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Open Access Article

11 - Modeling of time series of Earth crust velocity field in Azarbaijan using multilayer neural network with PSO training algorithm
Tohid malekzadeh Dilmaghani

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Open Access Article

12 - Modeling of Tabriz north fault by four permanent GPS station in Azerbaijan from2011 to 2020
Tohid malekzadeh Dilmaghani

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Open Access Article

13 - Studying Geographical Distribution Map of Weeds of Irrigated Wheat Fields of Ardabil Province
بیتا Soheili

In order to identify the density and abundance of weeds in irrigated wheat fields of Ardabil Province, 76 samples of irrigated wheat fields based on cultivation area from all counties of Ardabil province for six years (2001-2006) were selected. The genus and species of More

In order to identify the density and abundance of weeds in irrigated wheat fields of Ardabil Province, 76 samples of irrigated wheat fields based on cultivation area from all counties of Ardabil province for six years (2001-2006) were selected. The genus and species of weeds from each sampling fields and their population indices density, frequency and uniformity of each species were calculated by using Thomas method. Geographic coordinates of field (Latitude, Altitude and Elevation) were the main coverage and were determined by using GPS. These data were used for producing weed maps using GIS in irrigated wheat fields of Ardabil province. Results showed that bedstraw (Galium tricurnatum), Fumitory(Fumaria vaillanti)and wildradish (Raphanus raphanistrum) were dominant broad leaf weed species and wild oats (Avena fatua), rye (Secale cereal) and mouse foxtail(Alopecurus myosuroides) dominant grassy weeds species in irrigated wheat fields of Ardabil province. Bindweed (Convolvulus arvensis), Canada thistle(Cirsium arvense)and Acroptilon repens were the most important disturbing plants prior to harvesting in irrigated wheat fields of Ardabil province. Manuscript profile

Open Access Article

14 - Distribution Map and Community Characteristics of Weeds in Barley Fields of Ardabil Province
B. Soheili M. Minbashi D. Hasanpanah N. Razmi

Surveying weeds of irrigated barley fields is one of the most important practices in weed management. Based on cultivated areas irrigated barley in all counties of Ardabil province during six years (2000-2005), 46 sample barley fields were selected and weed species were More

Surveying weeds of irrigated barley fields is one of the most important practices in weed management. Based on cultivated areas irrigated barley in all counties of Ardabil province during six years (2000-2005), 46 sample barley fields were selected and weed species were counted in each sampling point and population indices were calculated with Thomas method. By using specific furmula the density, frequency and uniformity of each weed species in fields were calculated. In each field longitude, latitude and altitude were recorded by using GPS. These data were used for producing weed maps using GIS. Results showed that Galium tricurnatum, Fumaria vaillantiand Raphanus raphanistrum were dominante broadleaf species in irrigated barley fields of Ardabil province. The dominant grassy weed species in these fields were Avena fatua and Secale cereal. Convolvulus arvensis and Cirsium arvense were the most important troublesome plants prior to harvesting in irrigated barley fields of this province. Manuscript profile

Open Access Article

15 - کاربرد GISو سنجش از دور در برنامه¬ریزی فضای سبز شهری(مطالعه موردی: منطقه 6 شهراصفهان)
امیر کرم شیلا حجه فروش نیا

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Open Access Article

16 - A New Algorithm for ABS/GPS Integration Based on Fuzzy-Logic in Vehicle Navigation System
Ali Amin Zadeh Hamed Banizaman Ali Torab Jahromi Ali Akbar Safavi

GPS based vehicle navigation systems have difficulties in tracking vehicles in urban canyons due to poor satellite availability. ABS (Antilock Brake System) Navigation System consists of self-contained optical encoders mounted on vehicle wheels that can continuously pro More

GPS based vehicle navigation systems have difficulties in tracking vehicles in urban canyons due to poor satellite availability. ABS (Antilock Brake System) Navigation System consists of self-contained optical encoders mounted on vehicle wheels that can continuously provide accurate short-term positioning information. In this paper, a new concept regarding GPS/ABS integration, based on Fuzzy Logic is presented. The proposed algorithm is used to identify GPS position accuracy based on environment and vehicle dynamic knowledge. The GPS is used as reference during the time it is in a good condition and replaced by ABS positioning system when GPS information is unreliable. We compare our proposed algorithm with other common algorithm in real environment. Our results show that the proposed algorithm can significantly improve the stability and reliability of ABS/GPS navigation system. Manuscript profile

Open Access Article

17 - Accurate Prediction of DGPS Correction using Neural Network Trained by Imperialistic Competition Algorithm
Mohammad Reza Mosavi Hodeis Nabavi

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Open Access Article

18 - Temporal and Spatial Prediction of Rainfall-Induced Landslides using the Specialized TRIGPS Model
Sahebeh Sadeghi Golam Reza Shoaei Mohammad Reza Nikudel

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Open Access Article

19 - A Novel Method for VANET Improvement using Cloud Computing
Saied Raeeszadeh Reza Sabbaghi-Nadooshan

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Open Access Article

20 - A tractor-mounted soil cone penetrometer for mapping spatial variability of soil strength
M. Gohari A. Hemmat

A tractor-mounted, automated soil cone penetrometer was designed, constructed and tested for the purpose of measuring cone index throughout the entire soil profile. We propose the use of cone penetrometer profile to assist in mapping 3-dimensional spatial variability of More

A tractor-mounted, automated soil cone penetrometer was designed, constructed and tested for the purpose of measuring cone index throughout the entire soil profile. We propose the use of cone penetrometer profile to assist in mapping 3-dimensional spatial variability of soil strength. The apparatus consisted of a mechanical frame, an assemblage of control hardware and a laptop computer with the controlling software. A double-acting hydraulic jack with 80 cm stroke was mounted on the frame to push the cone into soil. A load cell and a digital caliper were used for measuring pushing force and depth, respectively. A DC motor was mounted on a power screw to activate a directional control valve and. The data acquisition module and an external global positioning system (GPS) were used to assist in real-time measuring, displaying, and recording the tractor position and soil penetration resistance.  Soil strength maps of five layers with 10 cm increment and mean soil moisture content were plotted. Results showed that in the first 10 cm layer, soil compaction was related to the soil moisture content but it was not occurred about other layers. Finally combining maps of soil strength made an effective soil profile in order to tillage with different depth. Manuscript profile

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