Q:At present, the global positioning system (GPS), vehicle positioning accuracy can be increased to less than 3 meters, if so, what is the theoretical basis? If not, what is the reason?

We use the accuracy of less than 15 meters, the Americans themselves can be very highThe use of GPS positioning, will be affected by a variety of factors. The factors affecting the accuracy of GPS positioning with GPS satellite can be divided into the following four categories:(1) SA from the U.S. government interests, by reducing the precision of broadcast ephemeris (Technology), adding high frequency jitter in GPS reference signal (Technology) and other methods, reduce the ordinary users using GPS navigation and positioning accuracy.(2) the satellite ephemeris error in GPS positioning, calculation of satellite orbit parameters at a time the GPS satellite position required is provided by various types of [7] ephemeris, but irrespective of the type of ephemeris, the calculated satellite location will be its true position difference, this is the so-called ephemeris error.(3) the satellite clock error of satellite clock error is the error between the installation on the GPS satellite atomic clock clock with GPS standard time.(4) satellite signal transmitting antenna phase center deviation satellite signal transmitting antenna phase center deviation is the difference between the nominal phase center and the true phase center of the signal transmitting antenna on the GPS satellite.

Q:How to install and use car GPS locator

Car GPS positioning tracker from simple to difficult to be divided into three main categories: OBD interface, with strong magnetic, wiring (and there are different functions, functions, wiring is a little bit complicated);1).OBD interface installation is very simple, just like an GT500 grain car, just plug in the steering wheel below the OBD port can be

Q:Millet 3 how to close the GPS positioning system

In the settings can be closed inside,1, pull out the notification bar from the screen;2, select the switch to find the GPS icon, if it is lit, click on the GPS icon turned gray, turn off.

Q:GPS positioning is not necessary to use a mobile phone card

GPS positioning is not necessary to use a mobile phone card

Q:Taobao to buy, the brand is the star GT02S, I was full of an electric car, opened only once, put a few days at home did not open, the results of last night to open the door even halfway out of the electricity, and hurt me back to the cart -!

Not great, you should be estimated about 7 days without riding the electric car, you like this, if the car is put in the home, and was afraid of being stolen, you can set the background data upload frequency, the time is a little longer, try not to easily turn off the equipment installed to positioning and theft the;

Q:If the use of GPS positioning products which brand is good?

360 is designed for children. Keys are too small, the old man is not convenient to use. Rather than buy a special for the elderly with GPS locator, such as sharp peaks RF-V16 what the wise.

Q:Mobile phone can be tracked after the closure of the GPS?

Can. Jia trillion mobile phone signal monitoring technology can detect.GPS is the English Global System (Global Positioning System), referred to as Positioning, is currently the most widely used positioning, navigation systems. GPS started in 1958, a project of the U.S. military, put into use in 1964, by the year, the global coverage of up to 98% of the 24 GPS satellite constellation has been completed. Now almost all of the intelligent mobile phone equipped with a GPS service, as long as the open GPS, we can use mobile phone navigation, shooting photos with location information, you can also use some cool and we are related to the position of mobile phone application. In addition, GPS can also help monitor the operation of the vehicle route, the location of the field staff, etc..

Q:Hello, not much, because it has a very low quiescent current!

The second: binding some devices are bound to bind the phone number to listen to the sound. But to spend six yuan to open the display, the device can know who is calling, is bound to the number, it is connected, you can hear. This brand is the city walk this way.

Q:GPS locator which is good

In fact, there is no correct answer to this question, in fact, that each have their own good, to say who this is really difficult to judge, the standard definition of everyone is not the same, I think perhaps you don't think so, I say this is not wise Albert PG02 everyone says, but right I hope you understand this just mentioned

Q:Does UUGPS have an anti - rejection tracking locator?

GPS can be installed to prevent the demolition of the alarm locator, or installation of hidden, it is best to install wireless GPS locator, which would like to put which