Global Positioning System Student ： Min-Yin Huang Hong-Wei Du Teacher ： Ru-Li Lin Department of Mechanical Engineering Southern Taiwan University of Science and Technology

Title  GPS introduced  GPS positioning sources  GPS positioning method of classification  GPS error sources  GPS systems architecture  GPS satellite signals  GPS market demand  GPS range of applications  Supplementary information  References

English full name ： NACSTAR GPS (Navigation Satellite with Time And Ranging Global Positioning System) the U.S. Department of Defense for military purposes by developed System

S1: distance the receiver miles. S2: distance the receiver miles S1 and S2 to the center, receiving distance radius to form a ball at the intersection of the two goals for the intersection of the circle.

2. Three-dimensional positioning The accuracy improved three-dimensional positioning. Compared to the two-dimensional positioning altitude, into a three-dimensional two- dimensional least four satellite signals received.

GPS positioning method of classification Measuring Navigation Stand-alone Double machine Stand-alone Double machine After- treatment Immediate Static state Dynamic Stop and Go Rapid Static RTK DGPS GPS positioning

1. satellite deviation 2. observing the deviation 3. observations deviation Orbit error Satellite clock error Selection bias Ionospheric Propagation delay Tropospheric Propagation delay Receiver error

The deviation between the receivers clock with GPS clock.

Receptor Outer space Satellite ephemeris distance Ground control station

Contains three components: a carrier (L1, L2) of the measuring Distance code (C / A code, P code), the navigation information (D code). C/A Code P Code D Code P Code L1 L2

ionospheric L1 and l2 two different high-frequency carrier purpose cancellation. In addition to the measurement of ionospheric effects caused by the delay error L1 L2

C / A code is clearly an open, available to users around the world are free to use. C / A code is generally modulated only on the L1 carrier, it is impossible to accurately eliminate the ionospheric delay. SA (Selective Availability) The United States to prevent the adversary using a global positioning system to jeopardize the national security of the United States. The technology is mainly used to artificially added in the satellite broadcast ephemeris errors and satellite clock frequency to generate fast jitter, thereby reducing the C / A code single-point real-time positioning accuracy

AS effect, P code plus plus code translation of W into Y Code; only the U.S. troops, allied forces, as well as specifically authorized to use.

1. Ground application 2. Sea applications 3. Aerial application 4. Space Applications 5. Leisure applications 6. Military applications

Purchase of GPS The optional GPS course, is their own use basis Use of the environment :

The main parts of the GPS chip is responsible for telling mapping software now the location of the major hardware, in general, in addition to chip also includes a template with the receiving antenna, GPS module can be combined into a usable

Mountaineer ：  Waterproof  Shock  Screen is legible, size, weight  Battery sustainability

Car  Dependence on Map  Maneuver  Shock Purchase of GPS Recommended Configuration ： Car navigation dedicated machine, PDA + GPS, PC + GPS

Navigation, Aviation  Map  Altimeter, temperature sensor Recommended Configuration ： PDA + GPS, PC + GPS

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