GPS's navigation application

Satellite technology can be traced back to the first generation of satellite navigation systems of maritime navigation to traced back to the 1960s. However, this satellite navigation system was originally designed mainly to serve the polar region and cannot be continuously navigation. The time interval of its positioning changes with latitude.It is above 70 degrees north and south latitude, and the average positioning interval does not exceed 30 minutes, but it takes 90 minutes near the equator. The second and third generation transit satellites launched in the 1980s Navars and Oscars make up10 to 15 minutes.In addition, it is difficult to improve the positioning accuracy (the speed of the Ship is required to accurately know the speed of the Ship), which is mainly used for 2 -dimensional voyage.

The emergence of the GPS system overcomes the limitations of the Transit system, not only high accuracy, continuous navigation, and strong anti -interference capabilities; it can also provide seven -dimensional space -time position speed information.In the initial experimental navigation equipment test, GPS showed that it could replace the TRANSIT and roadbirth radio navigation systems, and played the epoch -making role in navigation navigation.It is difficult to imagine which Ship is not equipped with GPS navigation systems and equipment. navigation applications have become the largest users of GPS navigation applications. This is difficult to compare with users in any other field.

There are many GPS navigation users, and their classification standards are also different. If they are divided according to the type of route, GPS navigation navigation can be divided into five categories: ocean navigation; coastal navigation; port navigation; inland river navigation; lake navigation.

Different stages or regions also have different environmental requirements for navigation safety, but they are to ensure the minimum navigation traffic conflict, and the most effective use of the increasingly crowded routes, ensuring sailing safety, improving transportation benefits, and saving energy.There are roughly the following categories according to the function of the navigation system:

1. Autonomous navigation

The independent navigation system is suitable for any of the above five routes. It is basically a simple navigation system. Its main feature is to provide users with location, speed, flight direction and time information., No communication system.It is adapted to a Ship that sails on any sea, lakes, and inland, from large ocean cargo ships to private yachts.

2. Port management and guidance of entering the port

This system is mainly used for Ship scheduling management at port/pier and guidance to Hong Kong ships to ensure the safety and order of voyage of ports/pier.The system requires two -way data/phonetic communication to facilitate the leader to guide the Ship; the context/sea map of the port area shows that the mooring ships and the available port routes are avoided to avoid collision.This system requires high accuracy of navigation systems, and uses differential GPS and other enhanced technologies.

3. route traffic management system

This type of system is similar to 2, but it is mainly used for Ship navigation and management on the offshore and inland river routes, and usually requires support of satellite communication systems, such as Inmarsat.

4. Tracking the surveillance system

Such systems are mainly used for maritime patrol boats, anti -smuggling and various yachts, especially private yachts to prevent theft.According to the specific use objects, some systems need to give navigation parameters and two -way data/phonetic communication, such as anti -smuggling boats.Sometimes there is no need to give navigation parameters. For private yacht anti -theft, only one -way data communication is required. Once theft occurs, the navigation system on the yacht continues to send its own position and to the relevant center in order to track it.

5. Emergency rescue system

The system also includes amphibious aircraft, helicopters and land vehicles.It is suitable for all five types of routes to search and rescue all kinds of sea, lakes, and inland risks, dangerous ships and people.This type of system requires two -way data/phonetic communication, which requires fast response time and high positioning accuracy.

6. GPS/Sound combination is used for underwater robots navigation

This type of combination system can be used for underwater pipeline laying and maintenance (required visual system), hydrological measurement, and other sub -operations, such as underwater survey for port/dock, so that the channel obstruction is cleared and the channel is unobstructed.Can be used for ocean fishing, fishing boat operation guidance, etc.

7. Other applications

The navigation techniques used are mainly:

GPS (GNSS);

Sound technology;

INS;

navigation

Radio navigation technology;

Image matching technology;

Other technologies.

The main communication technology adopted is:

FM and TV sub -carrier unidirectional data/speaking communication;

By -way data communication of the benchmark network;

Cluster communication;

Honeycomb communication;

Land mobile digital communication;

Satellite mobile communication;

Drives of traffic.

The first five communication technologies are mainly used for offshore, inland and lake areas.

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What is the reason for inaccurate positioning

1. Environmental factors

The accuracy of mobile phone positioning is largely affected by the surrounding environment to a large extent.For example, if you are in areas where the network signal is weak or the surrounding environment is covered, such as the high -rise building or underground space, this may interfere with the mobile phone to receive the GPS signal or mobile network signal, which will affect the accuracy of the positioning.

2. Signal interference

In addition to environmental factors, mobile phone positioning may also be disturbed by other signals.For example, harsh weather conditions may cause electromagnetic wave transmission, which affects the accuracy of mobile phone positioning.In addition, using the mobile phone metal protective cover may also interfere with the mobile phone signal, which will affect the positioning.

3. Equipment quality

Equipment quality also affects the accuracy of real -time positioning of the positioning instrument.If you are using a device with relatively low cost, there may be some errors during the positioning process.If you need higher accuracy positioning results, it is recommended to buy better quality equipment.

4. Electricity

The power of the positioning instrument will also affect the accuracy of real -time positioning.If the equipment is insufficient, then it may not be able to receive signals or transmit data normally, resulting in inaccurate positioning in real time.Therefore, when the positioning instrument is used, it is necessary to ensure sufficient equipment.

5. Device settings

If your positioning instrument is not set up properly, the real -time positioning will also be inaccurate.For example, the time setting of the device is incorrect or the satellite signal types that are not used are not matched, which may cause errors in the positioning results.Therefore, when using the positioning instrument, you must read the equipment instructions carefully and set the correct settings in accordance with the instructions.

How to solve the inaccurate mobile phone positioning

1. Comprehensive use of multiple positioning methods

At the same time, the mobile phone's GPS, mobile network, WiFi, and Bluetooth function are enabled to achieve more accurate positioning through multiple ways to complement each other.

2. Check the application positioning permissions

If the mobile phone still cannot be positioned accurately, the application positioning authority may be closed.You can check and open the relevant permissions in the [Settings]-[Positioning Service].

3. Update system and application

The update of system and application often contains the optimization and improvement of the positioning function.It is recommended to check and update the application of the mobile phone system and the application of the positioning function to ensure the accuracy and stability of the positioning function.

4. Clear the cache and restart the equipment

You can try to remove the mobile phone cache or restart the device to restore the normal operation of the positioning function.

5. Calibration compass

The function of the mobile phone also has a certain impact on positioning.If the function of the compass is deviated, the positioning may be inaccurate.Therefore, it is recommended to calibrate the compass of the mobile phone regularly to ensure its accuracy.

How to find the position of the other party's mobile phone

1. Use mobile phone positioning service

Most mobile phones have built -in positioning services, which are usually based on GPS (global positioning system) or other positioning technologies.If the other party is willing to share their location information, they can open the positioning function in various applications (such as maps, social applications, etc.) and actively share the real -time position for you.This method requires the other party's active cooperation, and it is only applicable to the other party's mobile phone positioning service.

2. Inquiry through telecommunications operators (required legal authorization)

In some special circumstances, if you involve legal procedures or security investigations, you may need to obtain the location information of your mobile phone.At this time, it is usually necessary to apply to the telecommunications operator and present a legal authorization or certificate.After verifying your identity and request legality, the operator may provide a general location information of the phone.However, this method involves complex procedures and legal procedures and should not be used at will.

3. Specialized mobile phone positioning software (only emergency situation and legal authorization)

These softwares usually need to install and authorize related functions on the target mobile phone.After installation, the software can track the position of the mobile phone through the network positioning technology.However, this method also involves privacy and legal issues, and it is necessary to obtain the clear consent of the mobile phone owner to use it.

1. Can the mobile phone riding software be used as a yard watch?

If the riding frequency is not high and the accuracy of the speed is not high, you can use your mobile phone to replace the bicycle codes, because now the mobile phone is also multi -star positioning, the accuracy should not be different from the low -end code table of the low -end code watch, and it will not be different.How many.If you are a friend who is often riding, it is recommended to buy a good -performing cycling code watch, because after all, the surgery industry has special attacks, the mobile phone speed is accurate, there is no coding, and the mileage and speed are biased.Moreover, the mobile phone weighs a lot. Under the condition of some ride conditions such as mountain roads and soil roads, it is easy to throw the mobile phone out and cause unnecessary losses.

2. Comparison of cycling code table and mobile phone code watch app

1. price comparison

The price of GPS code watch is a hundred yuan for many people, and the price of the flagship of the brand is sufficient to buy the Android flagship smartphone. When you have a powerful smartphone, you must not want to GPS codeSpend more money on the table.

However, with the emergence of more and more entry -level GPS giads, not only has strong functionality, but prices are no longer a problem.

2. battery life

Whether you use a gauge or a smartphone alternative code watch, the most unwilling to see is to remind you that "insufficient power".Generally speaking, the battery life of the code watch is longer than the mobile phone code app app.The official time is related to the function and screen brightness and other factors.

If you use a GPS code watch, it will greatly improve the battery life of your phone, because your phone does not need to drive a certain cycling app to consume your power. For the current peopleThe problem is not very big, the problem is very large.

If your cycling time is only 2-3 hours, then the smartphone is enough to cope with it, but if the longer riding time, it is recommended to equip a GPS code watch.

3. Screen and waterproof

Imagine whether your mobile phone's waterproof performance is passing on heavy rainy days, and the cycling watch takes into account the ride of heavy rainy days at the beginning of the design.There is also ride in strong sunlight. If you use smartphones, you need to mention high brightness to see the screen clearly, which reduces the battery life of your mobile phone. This GPS code watch is better.

navigation interface stops Running Recovery method

When using car navigation, you will encounter some problems more or less, when you encounter What should I do when the car navigation system interface stops Running?How to restore the car navigation system interface?The following is The reasons for stopping the operation and solution of the car navigation system interface, let's take a look together.

1. Excessive program cache: In the mobile phone settings-Application-All-Find a procedure that appears to stop Running-clean up data (most mobile phones can be solved through this method);

2. The mobile phone memory is too low: there are many system Running procedures and insufficient memory.

3. The installation location is wrong: Enter the settings-storage-preferred installation location-determined by the system to change the storage location.The program is not compatible: It is recommended to uninstall and reinstall the program or uninstall some procedures that are not compatible with the system;

4. Procedure itself: There are problems with some programs itself. If there is a problem with the software component in the early stage, the program causes a prompt to stop Running.(This situation can be concluded by comparing multiple different brands of machines);

5. If the above method is still stopped after exclusion, it is recommended to restore the factory settings, or redirect the firmware.

Common faults of car navigation systems

GPS cannot use the vehicle power supply

Under normal circumstances, GPS's battery life is about 1-2 hours, so when long-distance driving, vehicle power is needed.However, some car owners found that the prompts are always not bright whenever they use the vehicle power supply.After the inspection, it was found that the fuse of the original cigarette heater was burned, so the external power supply could not be used.At this time, the owner often believes that the quality of the car power supply of the GPS is too poor, but after multiple replacement, the situation is still.

In fact, the reason for the unable to use the vehicle power supply by GPS is not exactly caused by the quality of the vehicle power supply. Some of the reasons are caused by the design of the cigarette lighter.

Simple judgment and solution:

The owner can first observe which interface of his GPS vehicle power supply belongs to which one shows the following figure. When the A -type plug is plugged out, the fuse will occur, while the B plug will not happen.The owner can replace the vehicle power supply of the B plug.

For car owners who use the car plugs using A interface, if you do not want to change the vehicle power supply, you can insert it after starting the car and before the fire off the fire to prevent instant high -voltage burning.If you think this method is troublesome, you can choose to make a simple transformation of the cigarette lighter in the car.The metal piece above the cigarette jack is flat (red standard), so that the GPS cannot use the vehicle power supply.

GPS cannot search for satellite signals

Satellite signals are the basis for GPS to locate and navigation.If you cannot search for a satellite signal, then GPS cannot perform navigation work, which means that your GPS is just a scrap iron.There are 3 cases that cannot search for satellite signals in general GPS:

1. GPS belongs to the cottage in the cottage, and the "use period" is short.

2. The satellite signal is weak, and you can work normally after adjusting the position.

3. Drives from other electrical appliances in the car, it can be used normally after exclusion.

Simple judgment and solution:

To identify the reason why the satellite signal cannot be searched, you can try to locate on an empty Square.Satellite signals are easier to capture on the empty Square, and electrical interference in the car can be excluded.If in this case, it is still impossible to search for satellite signals, then 99%may be that your GPS belongs to a cottage in a cottage, and you should negotiate with the purchase merchant for replacement or even refund.

If you cannot search for signals in the car, when you are close to the window or even the window, you can get a weak signal. We can judge that it is the second case.The ability of GPS Star Search is closely related to the hardware of GPS. Generally, the navigator has built -in antennas. The built -in antenna is relatively small. The receiving original satellite signals are relatively weak, and they cannot even search satellite signals.Owners can choose to install GPS amplifiers to enhance GPS signals.

When using a variety of electrical appliances, such as driving recorders, GPS cannot be used normally.Well, the reason why the GPS signal cannot be searched is most likely the result of the interference of electronic products.Because the signal frequency band is too close, it leads to mutual interference.The owner can choose to use only one of the electrical appliances, or try to wrap the circuit board with Tin foil to eliminate the interference by itself.

The vulnerable to the GPS bracket response to the screen reaction

The three common problems are that the suction cup of the GPS bracket is easy to loosen, and the back clip is easy to break.In the GPS accessories, the bracket is the most prone to problems, especially the suction cup and the back clip.Many car owners report that the quality of the bracket's suction cup is too poor, completely sticky, and the road conditions have fallen slightly; the back clips are also very easy to break, and it will break.

Simple judgment and solution:

In fact, the phenomenon of loosening the suction cup generally occurs after a period of use. When the circular glue part of the suction cup is entered due to the air, the gap is left out of the vacuum part.fall.Frequent paste and extraction can also reduce the attachment function of the suction cup.The owner can wipe the front windshield and navigation bracket suction cups to reduce the gap left in the vacuum part.If the loose time is too frequent, GPS brackets should be replaced to avoid hidden safety hazards.

The back clip is broken, which is more caused by human factors.The unfairly demolition method of the owner makes the back clip that is not sturdy more easily broken.When removing, pay more attention to the direction of the back clip. Unfortunately, you can really be broken. You can buy universal brackets for replacement.

GPS screen reaction is slow

Touch screen life has become an indispensable part of our lives, and GPS is one of the earliest electronic products to apply touch screen technology.Slow screen response will not only affect the query effect of the handwriting input, but also when you click in the query, there may also be deviations.There are two types of screen reactions in general GPS: there will be two types of slow -screen reactions: there will be two types:

1. The screen is damaged by the sharp object

2. Degrees of screen recognition

Simple judgment and solution:

To identify the reason for the slow response of the screen, you can choose to enter the place name in your search destination.If the words in the handwritten box are always intermittent, it is difficult to be coherent, and even divided into multiple parts.Then the touch screen is likely to be damaged by sharp objects.Generally, this situation will only appear when it is more than half a year, and there is no solution.The key is the usual use and maintenance.When input, choose a handwriting pen with GPS, and try not to use the screen or toothpicks with sharp things for a long time as alternative with your fingertips.

The situation of screen recognition is generally reflected in the scope where the user's clicks cannot be accurately identified.For example, when the owner was selected by the route, the "best route" was clicked, while GPS recognized it into an adjacent "high -speed priority".At this time, you can re -adjust the screen.Generally, the screen adjustment is located under "setting", and the GPS of different brands will be slightly different.After entering the adjustment menu, after appearing a "Ten" calibration symbol appeared on the screen, click on the middle position of the handwriting pen to the intermediate position of the cross according to the prompts.

Summary: When the GPS fails, don't rush to blame the quality of the products sold by merchants.We should start with our own habits to see if we have improper use, which has accelerated GPS aging and damage.For GPS, which does have quality problems, the owner should resolutely safeguard his interests and replace the goods or even refund it.

1. The composition of the GPS map

The GPS map is a brand new geographical information carrier produced by the development of computer technology. The GPS map is born out of the map, presented the map in a digital manner, and can only be used in the computer.GPS maps have the functions of displaying, transmission and analysis. GPS maps can provide better presentations than traditional maps, such as enlarged, reduced, roaming, search, and path planning.

2. The difference between GPS map and traditional paper map

The conventional paper map emphasizes the data carrier, symbolization, and display. It is one of the roots of the development of GPS maps, and the GPS map focuses on analysis. Its expression method is much stronger than traditional maps. It has the following characteristics:

A. Integration of sound, graphic and digital multimedia, combine the intuition of graphics, the accuracy of numbers, the guidance of sound, and intimacy, make full use of the user's various sensory.

B. Inquiry retrieval and analysis function can support two -way retrieval from map graphics to attribute data and attribute data to graphics data.

C. Graphic dynamic changes function, from opening window scaling, browsing reading and other basic functions to the end of the animation function, multi -dimensional animation graphics simulation, etc.

D. With a good user interface, the use of users from the map generation process.

E. The multi -level ratio is converted from each other. It can match the screen content of the screen to perfectly match the current proportion, and automatically use the choice or synthesis of the compatibility of the ratio to the scale.

3. GPSHow is navigation electronic map collected and processed?

There are many collection methods for aviation electronic maps. There are mainly. Through remote sensing satellite pictures, analysis of the road network. In addition, based on the purchase and mapping unit from various places, the accuracy of the map is compared.By parsing through unmanned aircraft aerial pictures to obtain map data, and then from the national basic geographical information center activity related information;

The other is to collect on the spot, using artificial and vehicles for field collection and taking pictures to obtain map information.In these collection methods, there are only third types. The map data obtained on the spot is the most accurate and detailed.At present, there is only Ruitan Wanfang's Taoist Map of Ruitan Fang. In addition, many other companies have started to collect on the spot, but it is already later than Ruitanfang in terms of time.4Year.

Disclaimer: The above method stems from the index of the program system or the sharing of netizens. It is for your reference only and does not represent the research perspective of this website. It proves that it is valid. Please pay attention to the authenticity and authority of the source of the content of the content.Apply to delete & gt; & gt; error correction & gt; & gt;