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Okorder.com is a professional Gps Car Alarms supplier & manufacturer, offers integrated one-stop services including real-time quoting and online cargo tracking. We are funded by CNBM Group, a Fortune 500 enterprise and the largest Gps Car Alarms firm in China.Hot Products
FAQ
- GPS locator what brand is good RF
- A5E GPS locator MINI-W electric car / motorcycle GPS Beidou Positioning Terminal, GPS positioning terminal, ACAR Bluetooth anti tamper blind wireless GPS, KM01 remote power off the oil vehicle GPS positioner, OBD vehicle positioning diagnostic instrument, BCAR composite anti demolition type GPS positioner, OBD vehicle positioning instrument. Ali can see
- Mobile phone can be tracked after the closure of the GPS?
- General principle: mobile phone base station positioning is switched on when the mobile phone search different communication base station signal near the location, to get different mobile phone communication base station TOA (Time of Arrival, at the time) or TDOA (Time Difference of Arrivalm, the time difference of arrival), according to the measurement results and combined with the base of latitude and longitude coordinates generally use the triangle algorithm, we can calculate the location of mobile phone. The actual location estimation algorithm needs to consider the multi base station (3 or more than 3) positioning, so the algorithm is much more complicated. In general, the number of mobile phone search to the base station, the higher the measurement accuracy, the higher the positioning performance.
- Not exactly what kind of express orders, the goods is how to achieve GPS positioning. Or the cargo is equipped with satellite locator, or what kind of.
- Logistics to the transit station after scanning the logistics information, understand?
- How can we know that the car is not installed GPS positioning system?
- Follow it, find along the line;Fixed point check to see whether there is a common installation location.
- What is a GPS positioning system?
- Positioning principle of GPS systemThe GPS system uses the high orbit ranging system, taking the distance between the observation station and the GPS satellite as the basic measurement. In order to get the distance measurements, mainly use two methods: one is the measurement of the GPS satellite signal arrival time spread ranging code user receiver, i.e.pseudorange measurement; one is the phase between the reference carrier signal carrier Doppler frequency shift GPS satellite carrier signal and receiver with differential measurement, namely carrier phase measurement. The pseudo range measurement is the fastest, while the carrier phase measurement is the highest. The three-dimensional position of the receiver can be calculated by measuring the distance of 4 or more than 4 satellites.#
- The difference between the built-in antenna and external antenna of GPS positioning equipment
- External antenna: separate equipment and antenna device consists of a host, a signal line, power line, this kind of equipment for external signal line, can be placed closer to the sky outside the range, so the signal and stability will be much better, the accuracy will be better.
- Which kind of GPS locator is better, generally how much money?
- This is only more than and 100 you can go to see Huizhi Albert PG02 Alibaba,Shenzhen, okay, I spent almost a year.
- Beidou GPS locator and GPS locator difference?
- a GPS global satellite positioning system to ensure that all candidate points can be any ball, 6~9 observation satellite (application observation 11)The construction of the science and technology using a new generation of research and development of 930 chip positioner GPS, Beidou dual-mode positioning GSM, WIFI more than four positioning modes with the environment according to various elements of intelligent switching mode for a wide user positioning positioning the pursuit of perfection -- ultra fast, super quasi two
