source:Industry News release time:2022-07-27 Hits: Popular:realtime gps tracker online
Similar to the car GPS terminal, there are positioning mobile phones, personal locators, etc. Because GPS satellite positioning needs to use third-party positioning services, it has to pay varying monthly/yearly service fees.
All current GPS positioning terminals have no navigation function. Because additional hardware and software are required, the cost increases.
The car GPS advertisements we see on TV are completely different from the above car GPS. It is a GPS navigation product. When navigation is required, the first positioning is the starting point of the navigation, which is different from the real GPS positioning. It cannot transmit the positioning information to the third party and the holder, because the navigator Mobile phone functionality is missing. For example, if you put the navigator in the car, your friend borrowed the car and drove away, and the navigator can't send you information, then you can't find the location of the vehicle. So the navigator cannot locate.
You said I bought a navigation phone. Think about it, you put the navigation phone in the car. Now that the car is stolen, will the phone call and text you or a third party by itself? It needs people to operate. Therefore, the current navigation terminals do not have a positioning function.
The navigation terminal can navigate the route, so that you do not get lost in unfamiliar places, draw a route to get you to the destination, tell you your current location, and surrounding facilities, etc.
China should have achieved a large market in GPS at present. Among them, many companies are navigation. But there are also positioning management in the GPS industry.
Various GPS/GIS/GSM/GPRS vehicle monitoring system software, GSM and GPRS mobile intelligent vehicle terminal, the overall construction scheme of the system's secondary development vehicle monitoring system. The system is widely used in public security, medical, fire protection, transportation, logistics and other fields. The solution is based on NXP's PNX1090 Nexperia mobile multimedia processor hardware and software jointly developed by NXP and partner ALK Technologies. NXP claims that the solution provides everything a designer needs to build a low-cost, multimedia-rich portable media player with navigation capabilities including: MP3 playback, standard and high definition video playback and recording, FM Radio, image storage and games. NXP implements GPS calculations with its swGPS Personal software running on the PNX0190, replacing a GPS baseband processor, reducing bill of materials (BOM) costs and enabling field upgrades.
A series of associated applications that follow GPS are designed to math and algorithms, and GIS systems, map projections, coordinate system transformations!
Due to errors in satellite orbits and satellite clocks, the influence of the atmospheric troposphere and ionosphere on signals, and the artificial SA protection policy, the positioning accuracy of civilian GPS is only 100 meters. In order to improve the positioning accuracy, the differential GPS (DGPS) technology is generally used to establish a base station (differential station) for GPS observation, and use the known precise coordinates of the base station to compare with the observed value to obtain a correction number and publish it to the outside world. . After receiving the correction number, the receiver compares it with its own observation value, eliminates most of the errors, and obtains a relatively accurate position. Experiments show that with differential GPS (DGPS), the positioning accuracy can be improved to 5 meters.
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