Now people's living standards have greatly improved, GPS has also entered people's lives, many people are using GPS in their lives, but do you know what gps means? What is GPS positioning system? The following is some information compiled by the editor about the GPS positioning system for your reference:
GPS positioning system
The GPS main system is a satellite system launched by the old and the United States, and it contains 27 satellites that can continuously send geographical location altitude and time signals. 24 satellites are in normal use and 3 are spares. . Generally speaking, the GPS receiver on the ground can receive 5-12 satellite signals, and in order to obtain the positioning coordinates on the ground, GPS positioning requires at least 4 satellite signals, three are used to determine the latitude and longitude of the GPS receiver And the altitude, the fourth provides synchronous correction time. The global positioning system consists of three parts:
Space satellite part: It is composed of 24 orbiting satellites, divided into six orbits, orbiting at an altitude of about 20200 kilometers, orbiting the earth for about 12 hours a week. Each satellite continuously emits radio waves carrying satellite orbit data and time, providing various receivers on the earth for application.
Ground control part: This is to track and control the operation of the above-mentioned satellites. The ground control station set up is mainly responsible for correcting and maintaining the parameters of each satellite to maintain normal operation to ensure that each satellite can provide The correct message is received by the user receiver.
User receiver: Track all GPS satellites and calculate the coordinates, moving speed and time of the receiver's location in real time. Various Bluetooth GPSs belong to this part.
What we usually call GPS is part 3. 
What equipment does a complete GPS positioning system include:
A. GPS receivers are generally divided into the following types according to the interface:
Wireless Bluetooth GPS, currently mainstream such as HAICOM 406, Nokia LD-3W, Navibe 731, etc. are mainly used in conjunction with Bluetooth-enabled PDAs and smartphones.
USB interface GPS, mainly used with laptop computers.
The CF card interface GPS is mainly used with older models of PDAs without Bluetooth. 
B. Map operation terminal equipment:
Pocket PC PDA, PPC system is currently the mainstream of navigation, smart phones, notebook computers 
C. Navigation software map software, generally divided into the following types according to operating system:
PPC handheld computer system, mainly including Lingtu Skywalker 5, Kay Lide 2.0, Intercity, MAPKING, OZI, this system is currently the most abundant software and most powerful.
System smartphones mainly include ROUTE 66, Kelly, etc.
Smartphone Smartphones, mainly Kailide.
The PC system mainly includes Lingtu and Intercity. 
D. What functions does the GPS positioning system navigation system have?
Map query:
You can search the destination location you want to go on the operation terminal.
You can record the location information of the places you often go to and keep it, and you can share the location information with others.
Vaguely query information about your attachments or nearby locations such as gas stations, hotels, cash machines, etc. Route planning:
The GPS positioning system will automatically plan a route based on the starting point and destination you set.
Planning the route can set whether to pass certain way points.
Planning the route can set whether to avoid high-speed and other functions.
Auto navigation:
Voice navigation: use voice to provide drivers with driving information such as intersection steering, navigation system status, etc. in advance, just like a road guide tells you how to drive to the destination. One of the most important functions in navigation allows you to reach your destination safely through voice prompts without having to watch the terminal.
Screen navigation: On the operation terminal, a map will be displayed, as well as the car's current location, driving speed, destination distance, planned route prompt, and intersection turn-on prompt driving information.
Re-planning the route: When you do not follow the planned route or take the wrong intersection, the GPS positioning system will re-plan a new route to your destination based on your current location.
Drum type Rice Cooker
Features
This type rice cooker is famous with drum type appearance, which is easy operation and easy clean.
There are two type of inner pot , one type called white pot which is without non-stick but cheaper price .another one called non-stick pot is polished with emery, Also there are two type non-stick with different price ,it`s depending on different demands to use.
And the inner pot cannot be burned on the stove, which will make the pot transfigured and bad contact with the heating plate. While cooking , the heating plate or the fuse is most likely to be burned for the bad contact of the inner pot and the heating plate, Besides, make sure to dry the pot before putting into the outer shell of the rice cooker ,or else the drops of water flowing on the heating plate, will make the heating plate rusted.
Applications
Many peoples are used drum type rice cooker for congee and soup, some of peoples are prefer to use this type rice cooker for steaming.
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