Analysis of global satellite navigation system development trends and direction – navigation system, trends – Security Industry
90 years since the 20th century, the global satellite Navigation System with its fast, high efficiency, high positioning accuracy measurement range of features, popular in all industry data collection and resource monitoring officers of all ages.
From recent inspections, the global satellite navigation system, the following trends. Combined navigation system to the multi-direction
To get rid of the United States, Russia, navigation system dependent countries in the world, regions and organizations have set up their own satellite navigation and positioning system, China's Compass navigation, the European Union's Galileo in this column. Can be expected within the next few years there will be multiple systems coexist, which is integrated navigation Technology The development of the conditions. Through the Global Positioning System, Compass, Geluonasi, combined use of Galileo and other signals, not only can improve the positioning accuracy, and also enable users to get rid of a particular constellation of dependence, the availability of greatly enhanced, multi-system combined receiver have good prospects for development. And inertial navigation and radio navigation technology combined
As inertial navigation is completely autonomous navigation system, global positioning system in case of failure, inertial navigation can still keep working. In practical applications, inertial navigation system and global positioning system receiver coupling between the three kinds of ways: loosely coupled, tightly coupled, and the depth of coupling. In the depth of coupling, the global positioning system receiver as a circuit board is embedded in the chassis to the inertial navigation, which is the ECI system.
In addition, the Global Positioning System with Enhanced Positioning System (EPLS) combined. EPLS is an advanced wireless device that with a certain degree of autonomous navigation capability. At present, has been successfully verified by global positioning system network automatically converted to EPLS. Navigation direction to the difference
Use of differential navigation techniques, can reduce or eliminate the impact of users and base station, the observed systematic errors, including signal propagation delay and the guide star's own error, but also to eliminate errors caused by human factors.
With GPS technology, differential navigation will be more and more widely used, is applied to vehicles, ships, aircraft, precision navigation and management, land surveying, Aerial remote sensing and mapping, cadastral surveying and geographic information systems, navigation, aviation, navigation and other remote areas. Their own will from the present to the wide difference of regional difference, the global differential development of the navigation accuracy from short range of the meter level, decimeter to centimeter level, from the remote meter level to decimeters. Development of digital technology cesium clock
Global Positioning System satellites in orbit, the life of life depends on atomic clocks. Each satellite is equipped with three atomic clocks, cesium currently using an analog clock, the performance prediction difficult and the output frequency with temperature and magnetic field of satellite operation process and change, requires the development of computer-controlled digital cesium clock, by adjusting the and compensation for environmental impacts within the parameters to optimize performance cesium clock.
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