Longway GPS Blog

GPS applications are bright prospects for change in the status of human life and more local people, whether you carry the expensive phone nervous, because you are afraid of car theft and Yebunengmei Do not have to fear, with the development of GPS technology, these fears is superfluous.

 GPS global positioning system is the core of the future functioning of the force, its military technology from the United States evolved from the phone, transportation, aviation, surveying and mapping and first aid in areas such as extensive application.  In the car with the GPS anti-theft vehicles will be able to automatically download the current location, speed and other information, and this information will be timely feedback to the owner.In the aviation field, GPS is able to greatly enhance the accuracy of the flight, such as bad weather like fog this application is very important.

GPS systems built in 1978, in heaven operation of the 29 sent to the satellite positioning signal, the ground receiving equipment on these signals to achieve the targeted latitude and longitude. GPS is with us ever closer integration of life, may even be completely changed our way of life.

 In the next few years, Russia’s GLONASS and the European GALILEO will provide a more accurate and cheaper location-based services, will break the monopoly of GPS for many years. Based on the navigation services once universal, personal life will cause great change.

about GPS question of excursion, first of all from the principle of GPS positioning Jiangqi, from the mathematical point of view, is the space of three known locations, and you go to these three points of the relative distance, and your location, which is three-dimensional geometry In a very simple question, is the mathematical principles of GPS.

 Corresponds to the actual application, the location of three known, is not responsible for the three satellites, because the satellite is in accordance with the “ephemeris” precision operation, so it at a certain time we can know the location, which meet the mathematical principle , The first problem solving; second condition is that you need to know that the relative distance from three satellites, satellite launch a specific radio signal, the GPS receiver you receive this signal is later than the time difference, because the radio Transmission speed is known, through this time difference is you can calculate the distance between the satellites. Two conditions are met, you will come out of position.

These are only the GPS principle of a simple description, but also practical applications much more complex, in fact reached 3 D positioning, at least four satellites, to more than one is used to award the.  Interested friends can access the relevant information to satisfy your curiosity.

 Understand the principles of GPS positioning, we will find out that, although the mathematical principle is very simple, but through physical means to achieve the two known conditions, is a very complicated matter.

First, the satellite in the sky to fly, who can not guarantee that it can not slightest difference in their tracks, there are always more or less the deviation.  Second, the GPS receiver, you can not on a cesium atomic clock, the transmission speed of radio waves per second is about 300,000 km, a simple calculation you can see, if the error 0.00001 second time, the number of poor distance?  Even if you do not have the time error, the radio waves will spread in the air by many factors, such as weather. The impact of the above is not the most important, more important reason is that the impact of how much you can receive satellite signals.  GPS signals are very weak, then receiver on a small ceramic antenna, you can also count on what is good effect?  So basically what they are irresistible, you will not received signals, even if you have received a 10 eight strong satellite signal, we will certainly be very accurate? No. If you just catch up with this Zhacheng 10 satellites are a bunch of meetings, or a neat line of home school team, then you will have some trouble

 Nokia’s 3608 GPS exposure of the new machine In order to similar products in the fierce competition will emerge and Nokia S40 mobile phone introduced on the development of more elements and the trend of fashion design, for example, in April this year to “Beautiful to Use” as the theme of the release of three S40 mobile phone is particularly prominent The appearance of mobile phone models carefully designed. Now, in order to improve the sluggish performance of CDMA mobile phone market, Nokia in CDMA mobile phones have begun to introduce such a style and character, and for the Chinese market will soon introduce a fashionable form of CDMA handsets collapse - the Nokia 3608.

As in the upcoming low-end CDMA handsets, Nokia’s market position and not because of the phone and in the design of some of the slightest ambiguity. Although the overall shape of the aircraft did not launch in April this year, the Nokia 6600 (comments) f people as impressive, but the details of handling this by folding design of the three series of phone or a fashion show phone features, such as the introduction also The mirror of the popular design and hidden Waibing design, and polishing the mirror in the phone casing, in addition to design a special feeling for the dedicated multimedia keys, also has a 1.2 inches resolution of 128 × 128 pixels The 65 K TFT color screen, can display such as time, date, day-to-day calls, and other information, can also play music in the show repertoire of songs and relevant information. However, because of market-based positioning, the Nokia 3608 the main screen using a 2.0-inch resolution of 176 × 220 pixel 260,000 color TFT screen and use the S40 platform and operating system interface. It is worth mentioning that, Nokia also for the aircraft also provided a GPS navigation capabilities that can easily use the support network of various services related to mobile navigation.

The Nokia 3608 is also equipped with a 1.3-megapixel camera, 4x digital zoom and video capture function, compatible MP4, AAC & eAAC +, WMA audio format and 3 GPP H.263, H.264 and video file formats, such as MPG4 Player, built-in FM radio, cell phone in the fuselage with 15 MB of memory, but also through micro-SD memory card extended to 4 GB capacity. As for the main functions of the phone, the Nokia 3608 also supports the CDMA 800/1900MHz networks, and supports Bluetooth and USB2.0 connection, equipped with a 2.5 mm headset interface, the fuselage book can store up to 1,000 contacts, support SIND (Non-specific language to name dial-up), equipped with mobile phones in the BL-4B battery case, will be up to 11 days of standby time and continuous 3.5 hours of talk time.。 It is worth mentioning that, although the plane has been the official website there, but it was not clear when the aircraft will be officially published. At the same time RUIM support aircraft based on the details, The Nokia 3608 mainly targeted at China and the Asia-Pacific markets more likely.

 Chinese mobile phone Pakistan has been blocked from the cottage of trouble 。all of Chinese mobile phone market in Pakistan last complete cessation of sales, due to share a part of China’s mobile phone IMEI (International Mobile Equipment Identifier) communications disruption caused in Pakistan
In the past year, inexpensive Chinese mobile phone market in Pakistan has become a popular element, its main users of low-income people. However, tens of thousands with the same IMEI number of mobile phone imports to Pakistan.  Chinese handset makers individual acts of piracy, the Chinese have mobile phones in the Pakistani market as a whole image of the greater damage.
IMEI is composed of 15 digital electronic string, each of the mobile phone is the “identity”, by “* # 06 #” to see. Each cell phone only after the completion of the assembly will be given a global only a group of numbers, with the IMEI can phone in the GSM / UMTS networks.                                                                                                                                Pakistan Telecommunication Authority (PTA) in accordance with customer requirements disabled IMEI 135790246811220 numbers, with the result that hundreds of Chinese mobile phone users to purchase communications interruption. When a customer phones stolen, PTA will be closed in accordance with customer requirements IMEI serial numbers corresponding communications.  Dozens were killed PTA users and cell phone retailers theory, to unlock the request.                                                                               “Angry customers asking why they sold the phones were locked.” Pakistan phone franchise Chowdhury, Chairman of the Mohammed Waxin (Chaudhry Mohammad Waseem), said: “We can not unlock them, PTA in violation of the law. ”
 A retail store owner, said: “China’s mobile phone ban is unfair because many ordinary people can not afford to buy expensive products.”