global positioning system

Global Positioning SystemStudent ： 49814014 Min-Yin Huang 49814030 Hong-Wei Du

Teacher ： Ru-Li LinDepartment of Mechanical Engineering Southern Taiwan University of Science

and Technology

TitleGPS introducedGPS positioning sourcesGPS positioning method of classificationGPS error sourcesGPS systems architecture GPS satellite signals GPS market demandGPS range of applicationsSupplementary informationReferences

GPS introducedEnglish 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

GPS positioning sources

GPS positioning method of classification

1. Twice in spatial orientation

S1: distance the receiver 11000 miles. S2: distance the receiver 12000 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 positioningThe 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

GPS error sources

1. satellite deviation

2. observing the deviation

3. observations deviation

Orbit error

Satellite clock error

Selection bias

IonosphericPropagation delay

TroposphericPropagation delay

Receiver error

1.Satellite deviation

2.Observation deviationThe deviation between the receivers clock with GPS clock.

3. With observations related to the deviation

GPS systems architecture

Receptor

Outer spaceSatellite ephemeris

distance

Ground control station

GPS satellite signals

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

C/A CodeP Code

D Code

P Code

L1

L2

GPS satellite signals

ionospheric

L1 and l2 two different high-frequency carrier purpose cancellation . In addition to the measurement of ionospheric effects caused by the delay errorL1

L2

C/A CodeC / 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

Anti STILL effect (A-S)

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.

GPS market demand

52%

11%

23%

5% 9%

2004

69%

11%

13%

3%4%

2009 Personal Application

Professional applications

Individual leisure

Chase in vehicles and goods

Car navi-gation

GPS range of applications

Purchase of GPSSupplementary information

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

Purchase of GPSThe 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

Purchase of GPSMountaineer ：1. Waterproof2. Shock3. Screen is legible, size, weight4. Battery sustainability

Car1. Dependence on Map2. Maneuver3. Shock

Purchase of GPS

Recommended Configuration ：Car navigation dedicated machine,

PDA + GPS, PC + GPS

Purchase of GPSNavigation, Aviation1. Map2. Altimeter, temperature sensor

Recommended Configuration ： PDA + GPS, PC + GPS

Referenceshttp://www.google.com.tw/imghp?hl=zh-TW&tab=ii

http://www.garmin.com.tw/aboutgps/glossary.html#DFhttp://www.nasa.gov/http://www.gps.moi.gov.tw/SSCenter/Introduce/IntroducePage.aspx?Page=GPS6https://www.google.com.tw/search?hl=zh-TW&site=imghp&tbm=isch&source=hp&biw=1920&bih=955&q=%E8%BB%8AGPS&oq=%E8%BB%8AGPS&gs_l=img.12..0i24l2.1397.43675.0.45266.15.7.5.3.4.0.123.379.6j1.7.0...0.0...1ac.1j4.14.img.0du5hapBhBI#imgrc=IjkM46b1HVyUcM%3A%3BoBrC7Xv--TjhMM%3Bhttp%253A%252F%252Fimg.article.pchome.net%252F%252F00%252F01%252F26%252F85%252F74636_dka%255B1%255D.jpg%3Bhttp%253A%252F%252Farticle.pchome.net%252Fcontent-9991.html%3B308%3B256https://www.google.com.tw/search?hl=zh-TW&biw=1920&bih=955&site=imghp&tbm=isch&sa=1&q=%E6%BB%91%E9%BC%A0GPS&oq=%E6%BB%91%E9%BC%A0GPS&gs_l=img.3...74819.75596.0.75904.3.3.0.0.0.0.38.109.3.3.0...0.0...1c.4.14.img.7NaDAwqv8kM#imgrc=s-0HoOPWvXfr7M%3A%3BHRR-E9IiHTGtFM%3Bhttp%253A%252F%252Fbuy.yahoo.com.tw%252Fwebservice%252Fgdimage.ashx%253Fid%253D3900619%2526s%253D200%3Bhttp%253A%252F%252Fbuy.yahoo.com.tw%252Fgdsale%252Fgdsale.asp%253Fgdid%253D3900619%3B250%3B250https://www.google.com.tw/search?hl=zh-TW&biw=1920&bih=955&site=imghp&tbm=isch&sa=1&q=%E8%BB%8A%E7%94%A8GPS&oq=%E8%BB%8A%E7%94%A8GPS&gs_l=img.3..0i24l9.14656.22113.0.23453.11.9.1.1.1.0.48.396.9.9.0...0.0...1c.1j4.14.img.0cBSQ1HSzKI#imgrc=eD9WHe3WTvqMDM%3A%3BzhxcFq5utVuIPM%3Bhttp%253A%252F%252Fcaraudio.webcom8.com%252Fseo-caraudio%252Fuploads%252Fimage%252Fg1.jpg%3Bhttp%253A%252F%252Fcaraudio.webcom8.com%252F%3B400%3B360https://www.google.com/search?hl=zh-TW&q=%E6%99%B6%E7%89%87&um=1&ie=UTF-8&tbm=isch&source=og&sa=N&tab=wi&ei=Wb6ZUa7iCoeIlAWTpoDwBA&biw=1920&bih=955&sei=W76ZUaPwEYeYkQX864DACghttps://www.google.com/search?um=1&hl=zh-TW&biw=1920&bih=955&tbm=isch&sa=1&q=%E7%99%BB%E5%B1%B1&oq=%E7%99%BB%E5%B1%B1&gs_l=img.3..0l10.34178.35103.0.35463.3.3.0.0.0.0.88.174.3.3.0...0.0...1c.4.14.img.UurGuBpG3BQhttps://www.google.com/search?hl=zh-TW&q=%E5%9C%B0%E7%90%83&um=1&ie=UTF-8&tbm=isch&source=og&sa=N&tab=wi&ei=kL6ZUZeCJ5GtkgW844Eo&biw=1920&bih=955&sei=lL6ZUY_OLMWqkgXO8YA4https://www.google.com/search?um=1&hl=zh-TW&biw=1920&bih=955&tbm=isch&sa=1&q=%E8%A1%9B%E6%98%9F&oq=%E8%A1%9B%E6%98%9F&gs_l=img.12..0l10.4882.5036.0.5566.2.2.0.0.0.0.46.85.2.2.0...0.0...1c.1.14.img.3_Z6ZPkK9k8

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