Abbas Bashri Articles List

List of Articles Abbas Bashri

Open Access Article
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1 - Designing and development of a solar radiation system for atmospheric correction of satellite images
حسن حسنی مقدم Omid Coupanian Abbas Bashri Hamid Reza Khodadadi

Applying atmospheric corrections in order to reduce the attenuation effects of the atmosphere on the quality and accuracy of the recorded data, requires a comprehensive knowledge of the conditions, characteristics, and behavior of the atmosphere as the sensor passes thr More

Applying atmospheric corrections in order to reduce the attenuation effects of the atmosphere on the quality and accuracy of the recorded data, requires a comprehensive knowledge of the conditions, characteristics, and behavior of the atmosphere as the sensor passes through the target coordinates. Nowadays, many equipment's, models and algorithms are used to study the components of the atmosphere. For this reason, in this research, a native solar radiation system was designed and built to calculate the optical depth of air aerosol. In order to simulate and investigate the effects of changes in each atmospheric component, the MODTRAN model was used in PCModWin environment. In this electro-optical system, at two wavelengths of 450 and 550 nm, due to the absorption range of the air aerosol, in two different days in terms of the amount of pollutants in the atmosphere, intense data were recorded. In order to ensure the uniformity and linearity of the response of the designed electro-optical system to measure changes in the intensity of sunlight, radiometric calibration of this system was performed. Using atmospheric models, from the recorded intensity data, the optical depth of the weather and the horizontal atmospheric metrics were calculated. In order to verify and evaluate the performance of the designed system, optical depth data obtained from MODIS (Aqua) sensor and horizontal exponential data of Mehrabad Airport meteorological station were used. The results of the accuracy evaluation showed that the calculation of the optical depth by the system designed and the MODIS sensor (Aqua) both shows a number of 0.5 in the passing hour of the satellite. The results also show a good correlation between the horizontal visibility calculated in this study and the data obtained from the reference meteorological station. Manuscript profile
Open Access Article
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2 - Presenting a method to discover vehicle tracks in multi-time SAR images as a strategic capability in dealing with criminals and terrorist groups in border areas.
Hasan Hasani Moghaddam Abbas Bashri Masoud Ardini

Border areas are considered as one of the most important security bottlenecks of any country. Continuous surveillance and monitoring of these areas is one of the main priorities of the border guard forces and one of the main components of ensuring the security of these More

Border areas are considered as one of the most important security bottlenecks of any country. Continuous surveillance and monitoring of these areas is one of the main priorities of the border guard forces and one of the main components of ensuring the security of these areas. With the advancements in space and aerial imaging technologies, border monitoring operations have been done more quickly and accurately. Iran is known as one of the risky border countries due to the extent of border lines and the presence of numerous terrorist groups around its borders that identifying and eliminating these potential and actual risks requires intelligence elites regarding threatening events in these areas. Based on the needs of the border guards in order to identify the passage routes of criminals and terrorist groups, in this research, a method to detect and identify the tracks of vehicles using multi-time SAR images has been presented. First, the used images were modified in terms of the required pre-processing and the errors of SAR images, and in the next step, using phase information and the Coherence Change Detection (CCD) algorithm, the track of the vehicle was identified in the images. In order to evaluate the capability of the proposed method, the usual methods of detecting changes were also applied to the images. The results of the research show the high capability of the proposed method in identifying unauthorized border crossing corridors. The results of this research can be used as one of the components of security at the borders of the country. Manuscript profile

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List of Articles Abbas Bashri