Army compass or military compass 45-2A

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Specifications

Model: DC45-2A

Name: outdoor hiking or military compass and army compass, metal compass and marching compass in aluminium material

Product Origin: China

Supply Ability: 40,000 pcs/month

Minimum Order: 100 pcs

MOQ for OEM package: 500pcs

Detailed Product Description

Product Size: 44*36*25 (mm)

Color: Army Green, Military green

Material: Aluminum alloy

Accuracy: ±1°

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Q:For a free installation of GPS car locator?
In addition to the pre installed G book or Jetion car really want to install a GPS car locator to receive a total transmitter GPS bar
Q:Battery car GPS positioning tracker how much money to install?
With the night cat, a car filled, more than and 100 to 300 have
Q:Car positioning display offline is how
The vehicle off-line common reasons are the following: 1, the SIM GPS locator card money; 2, your car is in a signal blind area, equipment can not upload information; communication module 3, GPS locator (GSM module) problem; 4, the GPS antenna is broken; 5, no electricity equipment; 6 the GPS module, can not set a lower sensitivity. For a few reasons
Q:The difference between the built-in antenna and external antenna of GPS positioning equipment
Built in antenna, is a device and an antenna, the antenna in the device, the appearance of such equipment will generally be relatively small, but how much will affect the signal reception;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.
Q:How to design and manufacture of micro GPS tracking locator
you can buy in the market, and then according to their own modules to assemble
Q:Bad weather will affect the GPS locator accept signal
Hello, such as clouds thick fog and haze will affect the situation
Q:What does GPS mean
GPS principle24 GPS satellites orbiting the earth at an altitude of about 12 thousand kilometers from the ground, making it possible to observe more than 4 satellites at any point on the ground at any time, at any point in the.That due to the precise position of the satellite in the GPS observations, we can get the satellite to the receiver distance, the distance formula of three-dimensional coordinates, using 3 satellites, can be composed of 3 equations, solved observation point (X, Y, Z). Considering the error between the satellite clock and receiver clock, in fact there are 4 unknowns, X, Y, Z and clock, which requires the introduction of fourth satellites, the formation of 4 equations to solve, in order to get the observation points of latitude and longitude and elevation.In fact, the receiver can often be locked more than 4 satellites, then the receiver according to the distribution of the satellite constellation is divided into several groups, each group had 4 teeth, and then through the algorithm selected a set of minimum error for positioning, so as to improve the accuracy of.Due to the orbit of the satellite, the satellite clock error, the impact of the atmospheric troposphere and ionosphere on the signal, as well as the artificial SA protection policy, the positioning accuracy of civil GPS is only 100 meters. In order to improve the positioning accuracy, commonly used differential GPS (DGPS) technology, the establishment of base station (differential Taiwan) were observed in GPS, using the known exact coordinates of the base station, compared with the observed values, so that a number of amendments, and released. After receiving the correction, the receiver compares with the observed values, eliminates most of the errors, and obtains a more accurate position. The experimental results show that the positioning accuracy can be increased to 5 meters by using differential GPS.
Q:Where to buy online GPS locator good?
3, cross-border alarm: under the state of defense, the vehicle moves beyond the set range, will trigger the alarm. Alarm information automatically sent to the monitoring center and the owner of the phone. 4, online search car: positioning, monitoring, historical trajectory query, marking locations and other operations, providing the latest electronic maps, GOOGLE maps, three-dimensional satellite map. 5, web alarm: overspeed alarm, regional alarm, web pop-up alarm tips. 6, data statistics: speeding statistics, mileage statistics, speed statistics, alarm statistics. 7, cut off the oil: SMS control car oil circuit. (this feature is not recommended)
Q:What is the principle of automobile positioning system?
It can be seen that the role of the GPS navigation satellite system is to continuously transmit navigation messages. However, because the user receives the clock and satellite machine using a carrier clock may not always synchronized, so in addition to the 3D coordinates of X, y, Z users, but also the introduction of a t that is the time difference between the satellite and the receiver as unknown, and then use the 4 equation the 4 unknowns out. So if you want to know the location of the receiver, at least to receive the signal of 4 satellites.The GPS receiver may receive for accurate timing information to nanosecond time; for forecasting ephemeris in the next few months which the approximate location of the satellite; used to calculate the required positioning satellite coordinates of the broadcast ephemeris, the accuracy of several meters to tens of meters (each satellite is different at any time change) and GPS system information; such as satellite status.The GPS receiver can get the distance from the satellite to the receiver by the measurement of the code, because it contains the receiver satellite clock error and atmospheric propagation error, it is called the pseudo distance. The pseudo distance measured by the 0A code is called the pseudo distance of the UA code, the precision is about 20 meters, the pseudo distance measured by the P code is called the pseudo distance of the P code, and the precision is about 2 meters.
Q:Does UUGPS have an anti - rejection tracking locator?
Portable wireless positioning that is anti disassembly, the car can continue to work after theft.

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