Introduction of GPS Handheld PDA

Introduction of GPS Handheld PDA
Firstly, introduction of global four positioning system
(1) Global positioning system in the United States (GPS)
GPS was studied in 1994 in the United States, which cost 20years with 2,000 billion dollars. GPS uses navigation satellite to measure time and distance, which could be used in sea, land and air. GPS is the most popular positioning system in the world, which used in global precision navigation, command and scheduling system.
(2) Russian “GLONASS” positioning system
The GLONASS system can continuously provide high precision 3D position, 3D velocity and time information for all kinds of military and civilian households in the global sea, air and land.
(3) China Beidou satellite navigation system (BDS)
BDS was studied by China, which is the third mature satellite navigation system. BDS is made up by three parts, they are space segment, ground segment and user segment, which could provide all kinds of users with high precision, high reliable positioning, navigation and time service all day round the world.
(4) European GALILEO system
The GALILEO satellite navigation system consists of 30 satellites with an orbital altitude of 23616km. In 30 satellites, there are 27 working stars and 3 backup satellites. The altitude of satellite is about 24,000km, the satellite is located in three orbital planes with an inclination of 56 degrees.
Secondly, positioning accuracy of AUTOID GPS handheld PDA by SEUIC
AUTOID GPS handheld PDA is supplied by SEUIC, which adopts GPS, BDS and GLONASS positioning system. It could be used in global positioning, which access to faster and more accurate location information services in navigation applications.


Thirdly, types of AUTOID GPS handheld PDA
 

Fourthly, function and open modes of GPS
With the help of network, it could use the information of mobile phone base station, cooperate with traditional GPS satellite, which could make the positioning speed faster and more accurate.

Fifthly, using method of GPS in Android handheld PDA
When the GPS handheld PDA receives three or more satellite signals, the geodetic coordinates can be calculated. If four satellites are received, the elevation can also be calculated.
 

The six, using method of GPS in CE handheld PDA
 
NOTICE: Android and CE handheld GPS PDA should be in the open area.
The last, introduction of SEUIC handheld PDA
SEUIC (www.chinaautoid.net) is the leading manufacturer of handheld PDA, with design, research, producing lines. Handheld PDA supplied by SEUIC is integrated to PDA, data terminal, scanner and formatter, supports 1D and 2D barcode scanning, UHF RFID scanning, NFC and DPM recognition. It is certified by IP67 testing, which could be widely used in logistics, manufacturing, pubilic service, retail, medical and more.

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