摘要：Nautical and aero navigation are the most important applications of global available technology of positioning by means of satellite because there are no obstacles hindering ˝visibility˝ of efficient number of satellites for positioning. The accuracy of the system is mostly appropriate for nautical navigation and aero navigation as well but to approach the port or air port better accuracy is required. The article analyses methods to improve the characteristics of the satellite system of positioning so as to comply with more stringent safety demands.
