Radarsat-2 image geometric correction & validation using a few GCPs

Inhalt:
Taking advantage of its onboard GPS receiver, Radarsat-2 satellite can determine orbit in real-time with three times RMS less than 60 meters, a rapid geometric correction technique is proposed in this paper. The system error between Radarsat-2 image and the actual reference coordinates can be eliminated by imposing a few Ground Control Points to the RPF coefficients extracted from SAR product. The relative accuracy of this method has been tested by the formulation which got by the principle of SAR imaging. The absolute accuracy has been tested by 11 field collected GPS data. This experiment proofs that this technology can achieve geometric correction accuracy with a mean square error less than 2 pixels.