source:truck tracking webfleet solutions release time:2022-08-26 Hits: Popular:realtime gps tracker online
1. DGPS function
To minimize the effects of SA and atmospheric refraction, there is a device called a DGPS transmitter. It is a fixed GPS receiver (set within a radius of 100km to 200km of a survey site) to receive the signal from the satellite, it knows exactly what the precise time the satellite signal is theoretically transmitted to, and then correlates it with the actual transmission time. Compare, then calculate the "difference", which is very close to the effect of SA and atmospheric refraction, and send this difference so that other GPS receivers can use it to get a more accurate position reading (5m to 10m or less error).
Many GPS equipment providers set up DGPS transmitters in some areas for their customers to use free of charge, as long as the GPS receivers purchased by customers have DGPS capabilities.
2. Signal interference
To give you a good fix, a GPS receiver needs at least 3-5 satellites to be visible. If you're in a canyon or on a street lined with tall buildings, or in a dense jungle, you may not be able to communicate with enough satellites to be able to locate or get only two-dimensional coordinates. Also, if you're inside a building, you may not be able to update your location, some GPS receivers have separate antennas that can be attached to the windshield, or an external antenna that can be placed on the roof, which helps you receivers get more satellite signals.
3. Physical indicators
When purchasing GPS equipment, physical indicators such as size, weight, display screen, waterproof, shockproof, dustproof performance, high temperature resistance, and power consumption must be considered.
Read recommendations:
Last article:Intelligent GPS anti-theft electronic system
Next article:GPS performance indicators
Related Information
fleet solution webfleet solutions
2023-03-16Dog gps tracker price
2023-04-23Gps speed limiter Manufacturing
2023-04-23simple gps tracking Factory
2023-04-23Gps speed limiter price
2023-04-23gps vehicle tracker manufacturer
2023-04-11GPS Trackers company
2023-04-114G GPS Tracker for vehicles Production
2023-04-23personal gps tracker
2023-04-11Pet GPS Tracker
2023-04-11G05N Vehicle Tracker
2022-06-21G183 serials -JOBD GPS Tracker
2022-09-06TK100B- Accurate Pro version GT06/TK100
2023-10-06VSL100 GPS Speed Limiter, Speed Governor
2022-06-19P901 4G ID Card GPS Tracker Smart Walkie-talkie
2025-07-11What are the costs of buying GPS positioner?obd-II port gps tracker manufacturer
2023-04-06The role of GPS
2022-08-10How to use gps tracker?
2022-09-19Types of GPS
2022-08-17Why is the gps tracker showing offline?
2022-09-08GPS software function
2022-10-10Analysis of GPS antenna principle
2022-12-02GPS navigation phone.portable gps tracker Solution
2023-06-07What are the functions of the driving recorder?obd-II port gps tracker Manufacturing
2023-04-14The advantages and disadvantages of the flat antenna of the GPS vehicle positioning terminal
2023-04-06GPS active ranging and passive range.car gps tracker Solution
2023-04-19GPS monitoring information platform ensures smooth traffic
2022-12-17What are the elements of buying a driving recorder.gps tracker no monthly fee wholesale
2023-05-09Bluetooth GPS.obd2 gps tracker verizon sales
2023-08-03GPS development mode
2022-11-19