Instead of Ground Control Points, Sirius Pro uses GNSS RTK in combination with precision timing technology to determine the exact location for each of the positions at which a photo is taken. This precise positioning technology allows the image locations to be used as the equivalent of GCPs. As a result, project times can be decreased significantly and high accuracy mapping can now be done in areas without ground access.
The Sirius Basic brings all advantages of the Sirius Pro, except for GNSS-RTK.