The application GPS global of Made In China
The general overall uses of GPS Made In China are numerous and a single textbook cannot address all the GPS applications, especially when users create new ones almost every day. In this passage, we are going to talk about the application of GPS global use. A further additional arbitrary classification of navigation and survey uses is made to help organize the discussion of GPS applications.
Stand-alone users of GPS achieve the limited accuracy provided by the SPS. As mentioned earlier, the positional accuracy is about 10-20 m at the 95% probability level. The official values for position, height, and time have not yet been redefined after SA has been switched off.
An accuracy at the 10 m level suffices for many applications, particularly in navigation. For higher-accuracy requirements, DGPS is adequate for local, regional and even global applications. These applications mainly cover high-precision navigation on land, at sea, and in the air. Today's navigation of civil aircraft is based on a variety of systems such as radio altimeters and inertial systems which form the flight management system. DGPS supports these systems and can also be used to supplement the Instrument Landing System (ILS) which is presently the international standard for approach and landing.
This was the planned primary use of GPS Tracker China. Both military and civilian uses of the system in this mode are similar in that users wish to know their spatial locations as precisely as possible. For example, all types of aircraft and vessels may use GPS for en route navigation. But as aircraft are ready for landing or as vessels enter restricted waters, accuracy becomes more critical. Another factor critical to aircraft navigation is the high level.
Global application of GPS provides a powerful geodetic tool. This science is involved in monitoring global changes over time which is the key for understanding long-term geodynamical phenomena. Applications include measuring crustal deformations, postglacial rebound, volcanic uplift, plate tectonics, and earth rotation. In the past, Very Long Baseline Interferometry (VLBI) and Satellite Laser Ranging (SLR) techniques have been used for this purpose. GPS is not presently capable of replacing these techniques but it will be used to augment them and provide more cost-effective solutions to geodetic problems.
Timing and communications
Another global use of Personal GPS Homing Device is in global determination of accurate time. High accuracy timing has many scientific applications such as coordinating seismic monitoring and other global geophysical measurements. Inexpensive GPS receivers operating on known stations provide a timing accuracy of about 40 nanoseconds (95 % probability level) with only one satellite in view. With more sophisticated techniques, one can globally synchronize clocks even more precisely and an achievable accuracy of 1 nanosecond is considered possible.
Global communication depends upon precise coordination to pack as many data bits into a given period of time as possible. GPS should make it possible to increase the overall efficiency of communication, allowing many more users per unit of time than is presently possible.