source:Industry News release time:2022-10-11 Hits: Popular:realtime gps tracker online
The geodesic receiver achieves high accuracy (10-6 ~ 10-8) in static baseline measurements using GPS satellite carrier phase. However, in order to reliably solve the phase ambiguity, stationary observation for one or two hours or more is required. This limits its application in engineering operations. So the search for rapid measurement methods came into being. For example, FARA was used to reduce the baseline observation time to 5 minutes, and stop and go, re-occupation, and kinematic were used to improve the efficiency of GPS operations. The application of these technologies has contributed to the promotion of precise GPS measurements. However, the above operation methods are data processing after the event, which cannot submit the results and evaluate the quality of the results in real time, and it is difficult to avoid the rework phenomenon caused by the unqualified inspection after the event.
The emergence of differential GPS can give the position of the carrier in real time, the accuracy is meter level, to meet the requirements of pilotage, underwater survey and other engineering. Some techniques, such as position difference, pseudo-range difference and phase smoothing, have been successfully used in various jobs. This was followed by a more sophisticated measurement technique called carrier phase difference.
The carrier phase differential technology, also known as RTK technology (real time kinematic), is based on real-time processing of the carrier phase of two measuring stations. It can provide 3D coordinates of observation points in real time, and achieve centimeter level of precision.
The reference station transmits its carrier observation and station coordinate information to the user station in real time through the data link, which is the same as the pseudo-range difference principle. The user station receives the carrier phase from the GPS satellite and the carrier phase from the reference station, and forms the phase difference observation value for real-time processing, which can give real-time positioning results of centimeter level.
The methods of implementing carrier phase differential GPS are divided into two categories: correction method and difference method. The former is the same as the pseudoran difference, the reference station sends the carrier phase correction to the user station to correct its carrier phase, and then solves the coordinates. The latter sends the carrier phase collected by the reference station to the user station to find the difference and solve the coordinates. The former is quasi-RTK technology and the latter is true RTK technology.
Read recommendations:
portable gps tracker wholesaler
G900LM-4G Car Mini GPS Tracker
Key Points for GPS Selection.Car gps tracking Production
What affects the use time of the car GPS positioner.vehicle gps tracker webfleet solutions
Last article:GPS function and use
Next article:The conversion method of GPS coordinates in unit degrees and seconds
Related Information
Gps speed limiter Production
2023-04-23mini gps tracker Solution
2023-04-234G GPS Tracker for vehicles maker
2023-04-234G GPS Tracker for vehicles Manufacturing
2023-04-23fleet gps tracking manufacture
2023-04-23Dog gps tracker wholesale
2023-04-23gps tracker online wholesaler
2023-04-23fleet solution webfleet solutions
2023-03-16Cantrack G05
2023-04-23trailer gps tracker Factory
2023-04-23G200NY -Cow/Camel GPS Tracker
2022-06-21C32Plus (9~90V E-bikes/Motorcycle/Car gps tracker)
2022-06-21P60L Personal gps tracker
2022-06-21G900LM-4G Car GPS Tracker
2025-03-25G183 serials -JOBD GPS Tracker
2022-09-06The GPS system consists of three parts
2022-12-06Why is the GPS tracker inaccurate?
2022-09-16Timing method of GPS synchronous clock
2022-11-18Are the mortgage loan cars installed in the car GPS terminal?mileage tracking webfleet solutions
2023-03-14ODM GPS Solution for Smart Wheelchair Project Launched!
2022-06-18This section describes GPS working modes
2022-11-01Introduction to GPS module.Dog gps tracker manufacturer
2023-07-12Signal from GPS receiver
2022-11-08Introduce how to use the car navigation instrument.gps tracker with magnet distributors
2023-05-10Vehicle GPS
2022-12-08Fire truck installed with GPS global positioning navigation system
2023-02-06Features of GPS navigation map
2022-12-14Second generation satellite navigation system in the United States.4G GPS Tracker for vehicles manuf
2023-08-19The main error and elimination algorithm in GPS positioning
2023-02-10GPS management system-efficient management of your vehicle
2023-02-16