Asadollah Haghighat; Rahim Sarvar; Mehran Rezaii
Volume 19, Issue 75 , November 2010, , Pages 50-53
Abstract
Since the launch of the first satellite to determine the global situation, more extensive use and the need for more accuracy is constantly increasing. Particularly one of the navigator concerns is the need to the continuous determination of status through using wireless network with a higher degree of ...
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Since the launch of the first satellite to determine the global situation, more extensive use and the need for more accuracy is constantly increasing. Particularly one of the navigator concerns is the need to the continuous determination of status through using wireless network with a higher degree of confidence in urban areas. Unfortunately, the blind areas of the city are the opposite pole to precision in the positioning system because they are out of satellite's range of detection and reduce the precision of positioning. To overcome such problems, the use of pseudo-satellites as a complement to the GPS system can be effective in eliminating the weak signal reception and the ambiguity of the phase, and in achieving full accuracy and increasing the productivity of the Global Navigation Satellite System (GNSS). Pseudo-satellites are ground-based devices that transmit waves that are similar to GPS waves, and can increase the efficiency of receivers as a complement. This tool is an additional observational factor to address the above mentioned disadvantages. But due to expenses and environmental problems, the number of pseudo-satellites that can be installed is limited. More importantly, to reduce the multi-path error of pseudo-satellite signals it is necessary to determine the position of the antenna and pseudo-satellite device with accuracy. In general, this paper focuses on the development of a satellite simulator system and its proper economic appraisal to cover the blind spots of the GPS system in urban areas, using precise information of satellites and 3D maps.
