中文字幕av无码一二三区电影|久久精品久久久久久久久久|无码av喷白浆在线播放|萌白酱国产一区二区

GPS receiver can receive accurate and precise information to nano second. It can be used to forecast compendium of satellite location in the next few months to predict star calendar, used to calculate coordinates in satellite  positioning, precision is to ten meters (each satellite is different, changed at any time); And GPS system information, such as satellite condition and so on. GPS receiver to yards of measurement can get satellite receiver distance, due to diversionary receiver satellite clock error and atmospheric transmission error so called the pseudorange. To OA yards of measur...

For car user, GPS monitor system has a powerful function of anti- theft and navigation. In America, West Europe it has been already popular, whatever cars, truck， and bus usually are all equipped with GPS anti-theft system. However GPS monitor system has not been popular in domestic, which is closel...

 

Global Positioning System (GPS) is a worldwide radio-navigation system formed from the constellation of 24 satellites and their ground stations. The Global Positioning System is mainly funded and controlled by the U.S Department of Defense (DOD). The system was initially designed for the operation of U. S. military. But today, there are also many civil users of GPS across the whole world. The civil users are allowed to use the Standard Positioning Service without any kind of charge or restrictions.
 
Global Positioning System tracking is a method of working out exactly where ...