A high level of reliability is made possible by processing all of the data from the available reference stations and processing this information using a weighted, least squares solution. The corrections are adjusted for the user’s specific position giving an optimal solution.
OmniSTAR VBS is the foundational "sub-meter" level of service. It is an L1 only, code phase pseudo-range solution. Pseudo-range correction data from OmniSTAR’s regional reference sites is broadcast via satellite link to the user receiver.
This data is used, together with atmospheric modeling and knowledge of the receiver's location, to generate an internal RTCM SC104 correction specific to that location. This correction is then applied to the real time solution.
A typical 24-hour sample of OmniSTAR VBS will show a 2-sigma (95%) of significantly less than 1 meter horizontal position error and the 3-sigma (99%) horizontal error will be close to 1 metre.