<span lang="EN-US">This paper discusses compression methods focused on data transmission over communication channels. The characteristics of different algorithms for different types of incoming data are analyzed. The purpose of this study is to evaluate the speed of operation of each of the compression algorithms for different types of information and different compression parameters, on the basis of the obtained results to make recommendations for the application of compression methods in systems critical to the performance of the algorithm. Based on the results of the analysis, the methods of compression that can be used in communication channels are selected: LZW, LZH, Vitter and matrix. The practical research of the selected methods on different information flows (text, graphics, measurement data, combined data) was carried out, their comparative analysis was performed. Research has highlighted compression methods that give the most optimal results in each case. Comparative evaluation of algorithms for different parameters is made, the possibility of data compression implementation in systems running in real time is analyzed. Based on the results of the study, recommendations are made for the application of particular compression methods in specific conditions.</span>
The work is devoted to the review of the current state and development trends of airborne-based radar systems with a time-varying relative spatial configuration. The relevance of consideration of the state and tendencies of development of radar systems of aviation-ground based with time-varying relative spatial configuration due to the practical need to obtain radar images (radars) of objects in the front area of the system review, taking into account the growing requirements for promptness and accuracy of image detection of real-time surveillance in a complex signal-interference environment. The generalized structure of the construction of the systems considered in the work is presented and the main prospects for their practical application in solving the problems of classifying radar objects and monitoring radio emission sources are determined. Estimates are given of the main qualitative characteristics of the images of radar objects when applied when using the systems considered and the accuracy of determining the coordinates of radio emission sources is estimated based on an approved mathematical apparatus. The priority areas of scientific research on the further development of the theory of multi-positional reception of radar information in the conditions of information uncertainty when using systems with a time-variable relative spatial configuration are determined.
The paper is devoted to the consideration of the current state and trends in the use of simulation modeling for mathematical modeling of terrain data obtained from the processing of digital images, both from photos and radar systems of Aerospace-based aircraft. The relevance of considering the state and trends in the development of technological approaches in modeling systems is due to the practical need to obtain data from photo and radar images of objects in the system's viewing area, taking into account the growing requirements for the efficiency and accuracy of determining (detecting) images of observation objects in real time in difficult conditions. The general structure of the construction of technologies used for simulation modeling of terrain objects is given the main prospects for practical application of these technologies in solving problems of classification and monitoring of terrain objects are determined. Estimates of the main technological approaches to images of objects in the application of the considered systems and assessment of the accuracy of determining terrain coordinates are given. Channels of information transmission in the process of receiving and processing data from photo and radar systems of remote sensing of the earth are considered. Also, as an example, a chain-node model of spatial data about objects that are obtained during remote sensing of the Earth and are represented as linear and point-based. To create a geographical basis for further modeling of various telecommunications and communication systems. This will allow for more accurate development of telecommunications and communication systems based on geographical data. Take into account the closing angles when forming a cellular connection.
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