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.

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;

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.

[car navigation] How to install the vehicle DVD navigation installation step of the vehicle DVD navigator map

I believe that after many car owners buy the car DVD navigator from the car supplies network, they do not know how to install the navigator, how to remove the original car's DVD navigation and install a new navigator.There are also some vehicles that are very expensive because they are unfamiliar with the installation process, and even have a clever situation.So how to install the car DVD navigator correctly and properly to the car, so that you can enjoy a happy and relaxed navigation life.

When installing the car DVD navigator, you should clearly understand some basic installation precautions.First, the screen clarity of the DVD navigator that is bought is an analog screen or a digital screen, and it is clear about the convenience of the navigator electronic map upgrade and after -sales.

Finally, if you talk about the specific installation process, prepare a cross -stroke cone and a flat -headed cone, remove the shifting rod cover, unplug the cigaretteer wiring, remove the air conditioner speed switch, and fix it with a cross cone to fix it.Unscore the screws, remove the air conditioner control panel with a word cone, unplug each wire head, and use a cross cone to unscrew the fixed CD four screws, and pry down the central air outlet from the inside to the outside with a flat cone. Do not pay attention to too much attention.EssenceIn this way, you can easily remove the original car's DVD navigator, and then the owner can re -install the newly bought navigator according to the removed process to complete the installation process of the entire vehicle DVD navigator.

Map installation step

1. Download tools:

"Official Detection tools" (the physical port, Potter rate) of DVD navigator, or special GPS port testing Tool, "GPS idle port detection Tool", "GPS hardware system detection Tool".

Second, prepare a TF card.

4G card, you can only install one map;

8G card, you may install two maps;

16G card, you may install four maps;

32G card, may install multiple maps, or 4 maps, plus music, videos, etc.

3. Copy the above three software to the new TF card root directory.

Enter the navigation machine settings- "navigation path settings", point to the .exe file in the software in the software, which can be measured separately:

The physical port of the navigator, the value of the baud rate; the idle port number of the navigator;

The hardware system of the navigator, such as: operating system category, CPU type and frequency, memory, screen resolution, etc.

4. According to the situation of this machine system, select the map that is suitable for your machine.

Note: The new card is reinstalled. You should download the full version or lazy bag.Not map resources.

Fifth, decompress the downloaded map compression package, and then copy the file package to the TF card root directory.

Modify the port number and Potter rate: COM2 (if 2 is your machine port number); 4800 (if your machine's baud rate is 4800) is confession as an example.You are based on the values you actually measured.

A. Use the modifier in it

The specific steps are as follows:

The first step is to open the map folder;

The second step is to open the "Naviresfile" folder

See "naviconfig.dll" file

Open the "Port Modifier", click "Reading" in the modifier, after reading success,

Modify port formation: COM2, rate: 4800.Click the "Modification" button again, and then press the "Exit" button.

A file called "Naviconfig-New.dll" is generated in the "Naviresfile" folder.

Delete the original "naviconfig.dll" file;

The "naviconfig-new.dll" file was renamed: "naviconfig.dll"

"Port modifier" retains non -deleted.

B. Taoism: Open the "UPF_VDD.CONF" file with a notepad book (conf forming file), and the manual modification instructions are: COM2 4800

The modification file is as follows 2 data:

[COM] = com7:

[baudrate] = 9600

C. Other maps:

The modification file of "Gaode" is: "gconfig.ini.exe" file

"Intercity" modification file is: "Comm_config.txt" file

The "US Bank" modification file is: "upf_vdd.conf" file (conf format file)

Note: When modifying, you can only modify the numbers. Do not change the format of any other programming language (including: space)

6. In the main interface of the navigator, in the "navigation Path" (or navigation file address), the .exe application in the map file was guided, and then the map was activated by pressing the "GPS" button on the navigator.

one,Principles of mobile phone navigation

mobile phone navigation is divided into work through GPS modules, navigation software, and GSM communication modules to complete.

1. GPS module completes data collection such as search tracking and positioning speed of GPS satellites.

2. The navigation software map function obtains the location information of the GPS module and constantly refresh the electronic map, so that we constantly move our position on the map.

3. navigation software path guidance calculation function, plan a walking route that reaches the destination according to our needs, and then guide us to walk towards the destination.

4. The GSM communication module completes the communication function of the mobile phone, and can process the collected GPS data according to the mobile phone function and upload the designated website.

2. precautions

mobile phone navigation is that the mobile phone must have general communication functions and navigation functions. There are many mobile phones with navigation functions. The key to buy navigation mobile phones is to pay attention to the following points:

1. Whether the screen is large enough, because the screen is small, it can't be seen clearly, it is inconvenient to use.

2. Whether there is an electronic dog function. The so -called electronic dog function is the reminder function of the monitoring system. It can remind you how many meters in front of you have speed measurement monitoring in front of the vehicle.Do not run through the red light, and so on, which is very practical.

3. The map should be able to update, because the roads will change each year, such as new roads, adjustment of single and double lines, etc., so the map of navigation in the mobile phone must be changed, otherwise it will be inconvenient.

4. Determine whether it is a GPS mobile phone, or an A-GPS mobile phone, the GPS mobile phone is high accuracy, and the A-GPS mobile phone accuracy is slightly lower.

5. Confirm whether the mobile phone navigation will generate other costs during use, such as network traffic fees or GPS software usage fees.

3. Common mobile navigation providers

Figure Bar navigation

The first batch of Beijing Tu Bar Technology (Beijing Tu is Xian Technology Co., Ltd.), which has obtained electronic map licenses. It is the most professional electronic map service provider in China. It was established in 2004. It is a leading industry in the industry that is jointly invested by well -known internationally renowned venture capital institutions.High -tech enterprises.Tu Bar Technology has established a well -known electronic map brand -Tu Bar, and has achieved international professional standards in mobile maps, navigation products and services.The map bar establishes the industry's largest update and timely map information (POI) database and bus line database to fully meet the query and line inquiry of various living information of users.With the significant characteristics of online high -speed browsing, quick query, accurate lines, navigation optimization, and comprehensive data.

Kaelid navigation

Kaelid is a high -tech enterprise based on geographical information data, based on land resources, system platforms, and navigation systems as the three major business pillars.Essence

In the field of GIS applications, Kaelid uses the original space information processing technology to help customers understand the value of geographical information with data visualization and visualization of thinking and make visionary decisions.According to international software engineering standards, Kaelid has developed I-Spatial platform with independent intellectual property rights, X-Bridge, and e-government platform X-Bridge. On the basisProducts; on the basis of geographical information data, Kaelid took the lead in extending business scope from government decision -making support, industry applications to personal GPS navigation applications, and continued to lead the development of the industry.

Gaode

Gaode is the leading domestic digital map content, navigation and location service solutions.Since its start in 2002, various businesses have developed rapidly and have been successfully listed on the Global Seasteak Global Market in the United States on July 1, 2010.

Based on the national and high -quality navigation map database, Gaode accumulates innovation in product, services and business models with rich technical accumulation, and builds a "map cloud service" platform that can cope with various customer types and product forms.Gradually formed a strategic business structure of "four screens and one cloud".The company will closely seize the huge opportunities brought by the mobile Internet for the location service industry. Relying on the leading position in the automotive navigation market, we have strongly entered the public application and service market, and strive to achieve the strategy of establishing a "mobile life service portal".

Tencent Map

On July 9, 2014, Tencent Map officially released the "zero traffic map", covering the two mobile platforms of Android and iOS, becoming the first map product in the industry to achieve real zero traffic and full offline.Use the problem of the map.

China Mobile

"China Mobile's mobile phone navigation" is a mobile navigation client software launched by China Mobile. It provides location -based travel information services, including the current or designated locations of maps, information query, bus or driving route inquiry and guidelines.Practical display, real -time traffic road conditions, positioning family positions, one -click traffic and other practical services.

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;

How to mediate signal signal GPS navigator positioning 6 tips

Searching for GPS searches is the most common problem encountered after consumers buying machines. In this article, Xiaobian mainly collects solutions that cannot be searching for stars caused by software problems.The hardware problem is mainly related to receiving chips, antennas, and even cases, which may affect the search star of GPS.Therefore, when buying a machine, don't think that the machine of the metal shell is very good. In fact, it will affect the search star. The most obvious impact is the slow search speed.

One: In the room, basement, subway and other places, it is basically impossible to find stars

Many friends have just taken back the GPS. I opened the GPS at home and found that I could nt find a satellite. The GPS positioner felt strange. When I bought it, I could search for the stars. How could I find it when I got home?For the first time GPS searches, you should find an empty place and wait for a few minutes. If there is no problem with the software, you can basically find the satellite.If you can't find a satellite for a few minutes, you must consider software settings or hardware problems. Generally, the map settings of GPS manufacturers will not have a problem with a problem with the GPS positioner, unless it is a map that consumers add.

Two: I can search the stars before, but I can't search for the star later

In this case, if the settings of all your GPS have not changed, you can try to reset the machine by a reset.In the past, you can search for stars, indicating that there is no problem with the hardware, and the software is normal. This, if Reset cannot solve the problem, you can only find a manufacturer to warranty.

3: Software issues, this is the most common problem encountered by consumers

The software problem is divided into several categories. One is that the download map itself is wrong. Now many forums have map downloads. Some maps can be used by moderators for testing., GPS positioner consumers spend half a day of downloading the map and do not know if they can be used.This is the most headache.Therefore, consumers are best to download the map of the map and test the maps that can be used. This is the most basic premise. If the downloaded map is wrong, other settings will not be able to talk about it.

The second is the problem of Potter rate and port settings, because the hardware settings of each machine are different, which requires different ports and baud rates.There are two segments of the Communist Party of China: one is COM, the other is the baud rate, and the COM port ranges from 1 to 7 (of course there are more, generally from 1 to 7), and there are many types of baud rates.You download the new version of the KLD. After entering the KLD interface, there will be no X -shaped logo on the right of a radar icon on the right side of a small radar icon on the right side of the right.If you appear again, continue to change your COM and I Potter rate.Due to the different machines or GPS map versions, the above two items you choose will be successful.

Copy GPS cannot search signal solution

What should I do if I can't search for satellite signals in GPS?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.

GPS navigator positioning 6 tips

I do nt know if there have been such experiences that users have experienced. In the first use, it took a long time in positioning.I did not set the position. At that time, I had a hair in my heart. You Lute was also a big brand. Is there a problem when I bought it?Later, I learned that it was because I was lying on the bed in the bed. How could this be determined?When you come to the Outdoor, you can locate in less than a minute.We may also encounter this or that trouble in positioning, so let's take a look.If the GPS positioning speed is slow (searched time & gt; 5 points), you may wish to follow the following method:

1. When positioning, you may wish to go outdoors because you cannot search for stars indoors.

2. In Outdoor conditions, we must first stay away from high -rise buildings or places with obstruction above (such as under the bridge). In addition, some special places will not be positioned due to the reasons of interference signals such as radiation.If you cannot locate somewhere, move to ten meters away.

3. When searching for stars in the car, we should use the bracket to install it on the front windshield. In addition to the second reason, the front windshield should be inspected whether the metal film is affixed.Because the metal membrane has a screen wall effect on wireless signals, the strength of the satellite signal is too weak.

4. At the same time, pay attention to it. Please do not place two GPS too close when used.GPS distances of different models of the same brand should exceed 10 cm.Please keep long distances with other brands of GPS, because the signal amplification circuit of the GPS will generate radiation to harm the human body. Regular manufacturers like Youlu special will be stricter in design., Will not cause radiation hazards to users, if they are cottage goods, they dare not say it.

5. Before using the new machine for the first time, it must be charged for 4 hours, otherwise there will be a slow search star.

6. If the above situation is excluded, there is still a long time (& gt; 5 minutes) that cannot be found in the stars, then we need to press the "reset key" to restart. Do not wait for a long time.