Disadvantages of dead reckoning can be considered the need for correction of accumulated errors of measurement parameters movement as a whole rather large dimensions of the onboard equipment, lack of affordable small-sized components for creating on-board equipment (accelerometers, autonomous schisliteley traveled path, sensors direction), the complexity of processing parameters of motion to calculate the coordinates in the onboard computer. The most promising area of application of such methods can be considered a joint use with radio navigation techniques, which will compensate for the shortcomings of one as much as other methods. Conclusion Even a brief review of methods and equipment positioning allows us to conclude that there is no universal system that can satisfy all the requirements of the end user. The task of creating effective working positioning systems is a much wider choice of a particular method. We can distinguish The following problems system-wide plan that must be considered customers and developers of such systems. Of great importance is the presence on the territory of the proposed deployment of appropriate infrastructure for the creation of a subsystem data.
Thus, the presence of computing and broadcasting correction data for the navigation apparatus in differential mode (similar, For example, the system radiomayakovoy U.S. Coast Guard) will significantly improve the accuracy of positioning using gnss without significant complication of onboard equipment. The presence of mobile connection with the cellular and microcellular structure will reduce the capacity of the onboard transmitter, which reduces the dimensions of equipment, simplifies the issues of energy supply (especially in a secretive mode setup), makes it difficult Detection of airborne equipment by hackers. In turn, the structure of microcellular communication systems can become the basis for the construction of zonal positioning systems, or will address locating 'Radiopelengation' methods. Separately, there are issues of creation of electronic maps that are intended to be used with avl systems, updating them.
Often, geographic information systems used to solve problems positioning than conventional mapping functions should serve as data correction, conversion of data from different coordinate systems, the logical binding trajectories of mobile objects to elements of the transport network based model of the mobile object. From this perspective, the benefits will have those systems in which organized surgical correction of road conditions, up to the accounting information traffic jams in some areas highways. Companies taking responsibility for security of the person or property, using the positioning system should solve the problem of information and legal interaction with power structures that provide physical safety or return of property. Equipment for mobile teams means of access to information databases, tools Automated positioning and targeting can significantly improve their efficiency. The solution to all these problems will create AVL-system, the most satisfying customer needs and able to promptly return the funds spent on development and implementation of the system.