Base stations generally consist of a RTK GPS/GNSS receiver that detects the current GPS/GNSS position and compares it to the actually known position of the base station to create what is called correction data. Simply, the correction data is the difference between the known position and the detected position, which is caused by various types of errors in the GPS/GNSS signals and affects all GPS/GNSS signals in a given area, and thus also the signals received by Rovers. The errors are responsible for the GPS/GNSS position deviations.
Through an interface, this correction data is transmitted in a standardized data transfer format called RTCM (Radio Technical Commission for Maritime services) to the Rover(s) to improve their positional accuracy.
2D offers its own mobile base stations (Datasheet), which are very easy to set up, can be easily transported and be used as stationary as well as moving Base Station!
Normally 2D mobile (transportable) Base Stations are used at serval testing grounds and thus are not mounted fix on one point. Therefore, it can work in Survey Mode to use the connected GPS/GNSS antenna to detect its own position from this GPS/GNSS data and use it as “known position” for creating correction data.
| Correction data | Created by Base Stations to correct errors applied to GPS/GNSS signals due to ionospheric errors. Correction data is only valid around 40 km around respective Base Station and transferred via RTK Link to Rover(s) in a standardized data transfer format called RTCM (Radio Technical Commission for Maritime services). |
| Public Base Station | Public institutions such as universities or other research facilities often provide correction data from their own surveyed base stations for a fee. |
| 2D mobile Base Station | 2D offers its own mobile base station with its own power supply due to its robust, waterproof and compact design. Can be used as stationary as well as moving Base Station when RTK should also be available far away from other Base Stations. By Survey Mode own position is detected as “known position”. |
| Survey Mode | Detecting static GPS/GNSS position of Base Station over longer time period (e.g., 5 minutes) to use the position as “known position”. |
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