GPS RTK
GNSS receiver
Smart and portable RTK system, adopts modularized design, smaller size, build-in integrated transceiver radio, one-button multi-function by RTK.
How RTK Receiver Works
An RTK GNSS receiver system uses the satellite positioning measurement method of RTK (Real-time kinematic) carrier phase difference technology to get high-precision positioning. Figure 3 shows how we set up our RTK GNSS receiver system. Unlike GNSS, RTK has two receivers. One remains static while the opposite moves around freely. These two receivers are called the bottom station and rover respectively. The job of the previous is to remain fixed and send corrected data to the latter. The rover then calculates the space using the info and produces a centimeter-accurate position. One base is often connected to the variety of rovers on if the base’s output setting matches the rover’s input settings. It means for a base station were applied defined coordinates with a variety up to five meters but absolute position (very accurate) is, ‘t known. With such settings you’ll have repeatable precision year by year, so, you’ll be ready to return to an equivalent navigation line but all of this may be shifted consistently with your real field location. It is when it’s possible to define the precise position of the bottom station. In cases when Trip providers or cadastral services are available. For instance, a farmer can have a mark on a field (usually a metal mark) with a cadastral number. During this case, if to place the station during this location and insert coordinates within the Fielded Toolbox app the bottom station starts working in absolute mode. Boundaries of fields, navigation lines, even between different GNSS systems are going to be synchronized, are going to be an equivalent whenever a rancher goes to the world. That’s what absolute accuracy means — repeatable complete precision even between systems, continents, years then on.
GNSS support multiple constellations
Notice that some stations are GNSS only, and a few are labeled as “GNSS” which indicates that they support multiple constellations, usually GNSS and Glonass, but sometimes Galileo also. Ideally, you’ll find a “GNSS” site within 20 kilometers but if not you’ll achieve success generating fixed solutions with stations up to 100 km or more away. If you’re employing a dual-frequency receiver and solving for a stationary rover you’ll usually use more distant stations. Remember that longer baselines will increase accuracy errors so, it’s an honest idea to run longer solutions and average the results from multiple stations if possible. The station sample rate is a smaller amount important than distance and number of constellations but a better sample rate is usually better if you’ve got the selection. RTK may be a technique to enhance the accuracy of the GNSS system. Traditional GNSS receivers, just like the one you will find in your smartphone, or on most of the robotic platforms could only determine their position with 2–4 meters accuracy. RTK can offer you centimeters. The whole GNSS system is predicated on measuring how long does it deem a sign to travel from a satellite to the receiver. Knowing the precise orbits of the space vehicles — the ephemeral, and a minimum of 4 travel times one can determine his position on the earth.” There also are GNSS augmentation systems (DGNSS), like SBAS or WAAS that measure current signal perturbations on many communication system stations everywhere on the planet, build an error propagation model, and broadcast corrections through satellites or radio. Many commercial receivers can use these signals for sub-meter positioning accuracy. But we would like to urge closer to centimeters, right? Commercial grade GNSS receiver usually only calculates coordinates, which are useless for RTK or post-processing. The keyword here is “raw data,” and you’ll need a receiver that outputs it. data include pseud oranges, carrier phase measurement, and ephemeral data, but not coordinates. Among widely available GNSS receivers with data
There be a tremendous paper on the fundamentals of GNSS navigation, which I might highly recommend to anyone curious about the subject. It’s called the GNSS compendium and is out there from the unboxing website. Understanding the working process of RTK is often intimidating. In layman’s terms, the essential function of RTK is to get rid of errors and reduce inaccuracies are employing a base station and a rover. Finally, the rover station outputs positioning data by the interface COM1.
You can visit our website: https://www.satlab.com.se/product_category/gnss/
