The paper on developing gps positioning system with GPS needs a paper on developing GPS positioning system.

Interpreting the application of GPS positioning system may be an idea that some people have had since childhood.

"ah! Where the hell did you put it? I believe this is an experience that everyone has encountered. I can't find anything, but I need it urgently.

Keys, nail clippers, IC cards or various certificates are often used, but I forget where I put them.

"Strange, it is here, how can it disappear? We always spend so much unnecessary time looking for what seems to be here that we put everything else aside.

Under the current cognition that "time is money", how can we not waste this meaningless time? My idea is: insert personal items into a microchip, and through the induction of the electronic instrument and the chip, we can immediately know the correct position of the items on the electronic instrument, saving our anxiety and unnecessary time.

I call this idea "Personal Positioning System".

Before this topic began, I also collected information about other positioning systems, hoping to further enlighten my ideas.

The realization principle of GPS positioning system The Gloal Positioning System (GPS) was developed by the United States. The whole system is divided into the following three parts: the space satellite part consists of 24 polar-orbiting satellites, which are divided into six orbits, running at an altitude of about 20,200 kilometers and orbiting the earth for about 12 hours.

Each satellite continuously emits radio waves carrying satellite orbit data and time, and provides various receivers on the earth.

The ground control part is to track and control the operation of the above-mentioned satellites. The main work of the ground control station is to correct and maintain the parameter data of each satellite that can maintain normal operation, so as to ensure that each satellite can provide correct information for the user receiver to receive.

The user receiver tracks all GPS satellites and calculates the coordinates, moving speed and time of the receiver in real time. GARMIN GPS belongs to this part.

[Details] GPS navigation principle GPS positioning is a basic triangulation principle based on satellites. The GPS receiver measures the distance by measuring the transmission time of the radio signal, and determines the position of the satellite in space by the distance. This is an observation method with high orbit and accurate positioning.

Suppose the satellite is at an altitude of 1 1000 miles, and measure our distance. Let's draw a circle with 1 1 000 miles as the radius and this satellite as the center. Our position is on the sphere.

If we want to get more accurate positioning, we must measure the fourth satellite again. From the basic physical point of view, the distance between us and the satellite is the time of signal transmission multiplied by the speed, which we call virtual distance. In GPS measurement, we measure wireless signals, and the speed is almost 186 thousand miles per second, but the time is surprisingly short, even as long as 0.06 second. Time measurement needs two different schedules, one is installed on the satellite to record the transmission time of the radio signal, and the other is installed on the receiver to record the reception time of the radio signal. Although the time from the satellite to the receiver is extremely short, the time is not synchronous. Suppose that the satellite and the receiver send out sounds to us at the same time, we will hear two different sounds, because the satellite comes from 1 1 1,000 miles away, so there will be a delay. Therefore, we can delay the time of receiver. From then on, the delay time/speed is the distance from the receiver to the satellite. This is the basic positioning principle of GPS.

[Details] The use of GPS navigation system is very extensive, and all the work that needs to be done on the ground can be realized by GPS.

Resource investigation and land exploration, such as illegal development of forest areas and hillsides.

Using GPS, you can successfully navigate to the suspicious mutation point, and directly query and visit the cadastral map and other related information to judge.

Navigation and Positioning: Satellite navigation systems for vehicles, aviation and navigation, such as automobiles, have become quite popular in the United States and Japan, while China is still in its infancy.

In the foreseeable future, all aircraft will use GPS as the standard navigation equipment, and they do not need to rely on the navigation equipment on the ground of the airport when taking off and landing.

Geodetic survey, generally speaking, traditional triangulation is a very hard work, especially when there are few ground triangulation points and landmarks are not obvious.

GPS positioning does not need to rely on ground control points, as long as there is no shelter, it is almost not limited by terrain, so using GPS as a measuring tool greatly improves the inconvenience of traditional measurement.

The higher the accuracy requirement, the higher the accuracy of GPS, and of course, the more expensive it is.

Make maps, electronic maps and rough topographic maps.

There are many kinds of digital maps: digitizing existing paper maps with digital versions, or scanning them into a computer with a scanner and then digitizing them on the screen or automatically.

We can record the waypoints with GPS every once in a while when the vehicle is driving, thus completing the rough map digitization work.

[Details] How to form a car GPS system The composition of car GPS can generally be divided into three categories.

The first kind is the original car equipped with GPS, with clear screen display, powerful function and rapid positioning; The second is a special vehicle-mounted GPS device, which is placed in the carriage by means of ceiling, embedded CD slot and hanging screen, and the price is within 1 10,000 yuan; The third is a simple GPS system based on PDA and notebook computer, equipped with GPS receiving card and special electronic map navigation software.

Vehicle-mounted computer system Vehicle-mounted computer equipment is an intelligent IT industry product in the post-PC era.

As early as the 1990s, European and American countries, Japan and other Asian automobile powers have successively completed the development and practice of automobile computer automatic control, monitoring and alarm, GPS navigation and other fields. For example, DaimlerChrysler, General Motors, EVS, Ford Motor of the United States, Toyota Motor of Japan and Mitsubishi Motor, etc., related technologies and products have also entered China one after another, but only in the fields of individual functions and professional automobiles.

[Details] GPS receiving antenna The function of GPS receiving antenna is to change the electromagnetic wave energy of radio signals from satellites. ...