What is a virtual reference station and how does it work. Virtualdj provides instant bpm beat matching, synchronized sampler, scratch, automatic seamless loops. This means that instead of using the traditional base station and radio to send correction data to a rover, data is sent using the internet to a cellular modem with a data plan. These reference stations have all been linked together using trimble vrs3net app software, creating a virtual reference station system vrs.
The virtual reference station vrs concept can help to satisfy this requirement using a network of reference stations. Using input from the closest surrounding reference stations, the rtn system then computes and sends corrections as if a real base station were broadcasting from the location of the virtual reference station. For a more detailed explanation of a trimble virtual reference station network, see product summary below. Lambert wanninger, who is a software developer and consultant for precise gps applications. For this position, observation data are created from the data of surrounding reference stations as though they had been observed on that position by a gps receiver. In this issue, the column provides a brief introduction to differential gps based on virtual reference station vrs techniques and presents addresses of several websites containing information on either software to generate vrs observations or networks providing vrs positioning. The rtn system computes a virtual reference station, in close proximity to the rover based on the position sent.
Previously we mentioned max, and virtual reference station as examples of. The network server transmits the rtcm correction stream for vrs position 8 recently, the use of virtual reference station vrs concept has been proposed by many research groups as a more. Each station, as a minimum, requires a receiver, an antenna, a modem for communication and a power supply. Rtk corrections using a cors network and proprietary pivot software. The network server transmits the rtcm correction stream for vrs position 8 recently, the use of virtual reference station vrs concept has been proposed by. Vrs virtual reference station is a system composed of hardware and software designed to facilitate realtime gpsgnss positioning based on a set of. Vrs virtual reference station is simply a method of rtk correction that will be explained further later. These reference stations include sites using trimble gpsbase, gpsnet, and trimble reference station trs software. A virtual reference station vrs is a concept where the existence of a differential reference station located near a mobile rover is simulated by software in. Pdf how well does the virtual reference station vrs system of. This list provides information on over 6500 base stations throughout the world. He proposed the vrs technique for network rtk in 1997. You can use the list to find the reference station that fits your project needs. A virtual reference station is an imaginary, unoccupied reference station which is only a few meters from the rtk user.
The concept of virtual reference stations vrs offers new possibilities. This software facilitates the downloading of the rinex data of the vrs. Virtual reference station vrs connection examples snip support. Quality checks are performed by the software running on the central server on the continuously streamed data delivered by the base stations. Network rtk requires a recommended minimum of five reference stations there is no. Keynetgps is a series of continuously operating, high precision gnss reference stations. Here are a few example connections where a virtual reference station vrs has been used to get slightly different corrections and data types.